The second cohort of The Ion Smart and Resilient Cities Accelerator hosted a day full of thought leadership and startup pitches. Photo by Shobeir Ansari, Getty Images

In light of COVID-19, it is more relevant than ever to discuss and support startups with sustainability and resiliency in mind. At The Ion Smart and Resilient Cities Cohort 2 Demo Day, a virtual audience was reminded of that.

"So, 2020 has certainly been a year of unprecedented uncertainty and change for Houston, for Texas, for our country, and for our world," says Christine Galib, director of the accelerator. "The past few months in particular have been especially difficult as the global pandemic and civil unrest continue to spotlight systemic and structural scars on the face of humanity."

The virtual event was streamed on July 1 and hosted several thought leaders and presenters before concluding with pitches from four of the cohort companies.

"Through it all, and in a virtual world, Cohort 2 startups, the mentors, and our Ion team have been the change we wish to see in the world," Galib continues. "For these startups, failure is simply not an option — and neither is going at it alone."

Earlier this year, Galib announced the second cohort would be focused on solutions for Houston's air quality, water purification, and other cleantech needs. The program, backed by Intel, Microsoft, and TX/RX, launched on Earth Day and commenced shortly after. Cohort 3 is expected later this year.

Here are the four companies that pitched and the problems they are trying to solve.

Re:3D

re:3D was founded just down the street from NASA's Johnson Space Center to address the need for a mid-market 3D printing solution. The Houston-based startup also wanted to create their 3D printer that operates on recycled plastics in order to prevent excess waste.

"Where some see trash, we see opportunity," Charlotte Craff, community liaison at Re:3D says in her presentation.

Re:3D's clients can get their hands on their own Gigabot for less than $10,000, and the printer uses pellets and flakes from recycled plastics —not filament — to print new designs. Clients are also supported by the company with design software and training.

"We can help the city of Houston help meet its climate action and resilient city goals by transforming the way people think about recycling," Craff says about Re:3D's future partnerships with the city.

Water Lens

While two-thirds of the world is covered in water, only 0.7 percent is drinkable. And of that fresh water, 92 percent of it is used in agricultural and industrial settings. This is how Keith Cole, CEO and founder of Water Lens, set the scene for his presentation.

Water Lens, which is based in Houston with a lab located in Austin, wants to solve the problem of cities and countries running out of fresh, drinkable water by equipping huge water-using companies with a water testing tool.

"We've developed a system to let anyone test any water literally anywhere in the world," Cole says, citing clients like ExxonMobil, Shell, and Halliburton.

S2G Energy

S2G Energy, based in Mexico, is focused on optimizing energy management in order to digitize, empower, and unlock potential for cost-saving efforts and technology.

In his pitch, Geronimo Martinez, founder of S2G Energy, points out that restaurants, commercial buildings, and other adjacent industries can save money by implementing energy management solutions that come out of S2G Energy's expertise. In Mexico, Martinez says, clients include the top two restaurant chains that — especially during COVID-19 — need optimization and cost saving now more than ever.

Eigen Control

A refinery's distillation columns are expensive — their fuel use accounts for 50 of operating costs, says Dean Guma, co-founder and CEO of Houston-based Eigen Control.

Guma explains in his pitch how Eigen Control's technology can plug into existing sensors, model networks based on data, and employ the startup's artificial intelligent technology to reduce carbon emissions and save money on operating costs.

Aatonomy sees autonomous vehicles as inefficient and unsafe. That's why the Houston startup is doing something differently. Sean Pavone/Getty Images

This tech startup envisions Houston as a self-driving city

smart cities

When there isn't a global pandemic, nearly 7 million people drive around Houston, and an estimated 77,000 people commute for more than an hour and a half to work. Drivers spend $1,376 and waste 31 gallons of fuel a year — to sit in traffic for what adds up to 75 hours each year.

When Wilson Pulling moved to the city two summers ago, he set out to fix all that traffic-sitting using autonomously driven cars, but not the high-priced ones that Uber and Tesla have designed. These are your regular, three- or four-year-old Honda Civics and Kia Sorentos — the cars you already own.

In 2016, Pulling founded had Aatonomy with his partner, Yang Hu, based on their thesis work from Cornell's Computer Science program. Moving the company south after two years operating out of San Francisco, they aimed not to build the self-driving car of the future, but to make the cars that Houstonians are wading through congested freeways in today drive themselves.

"Everyone doesn't get to buy a Tesla. They're driving their Corollas," Pulling says. "The way autonomy is going right now, that person is never going to benefit. We are the only way."

The company's technology attaches a wireless receiver to the car, which has to be from at least 2016 to work with them. Then, Aatonomy places sensors all along the roads and streetlights. The sensors and receiver communicate with each other, and enable autonomous driving.

Imagine, Pulling says, a 30-mile of I-45 with Aatonomy's sensors. You'd roar up the freeway, handling the controls. Then, the car's computer, under guidance from Aatonomy's network of sensors, would take over. You'd sit back, the car will navigate the traffic along with the other cars — and if all the cars are autonomous, Pulling says, the algorithm could slash congestion. When your car exits the freeway, you'd take back control.

That stretch of freeway would cost $26 million for 200,000 commuters across Houston, Pulling says, but other self-driving cars cost around $250,000 per vehicle — summing up to $50 billion for those same commuters. And Pulling says the Aatonomy system is a safer bet than the way Uber's autonomous driving. Uber's car once killed a pedestrian because, somehow, the company didn't program it to avoid people jaywalking. But because Aatonomy will manage sensors all over the street, the company will be able to monitor potential accidents more quickly than an Uber car would.

"This is a really radically different approach to a technology that, frankly, a lot of people have lost a lot of faith in," Pulling says.

Aatonomy's approach requires a smart city commitment — but the city of Houston is already buying in. First, Aatonomy, a member of the Ion Smart and Resilient Cities accelerator's inaugural cohort, got a short-term project with Aatonomy and Verizon to mount intersection cameras for studying how to prevent collisions with pedestrians on the Northside.

Additionally, the city has also greenlit a two-year pilot with Aatonomy to automate a bus route in downtown Houston. The aim, Pulling says, is making a "proof-of-concept" before rolling out sensors across I-45 — but it's also to use Houston as proof that autonomous driving can be achieved, but from a different angle than Uber.

"Self driving cars don't work. That's our thesis," Pulling says. "That's why we're building self-driving cities."

From entrepreneur networking opportunities to thought-provoking panels, here's where you need to be in December. Getty Images

10+ can't-miss Houston business and innovation events for December

Where to be

Before everyone checks out of 2019, Houston has a couple more weeks filled with exciting entrepreneurial networking opportunities. Scroll through the curated list of innovation events you can't miss.

For a full calendar of Houston innovation events, head to Houston Exponential's page.

If you know of innovation-focused events for this month or next, email me at natalie@innovationmap.com with the details and subscribe to our daily newsletter that sends fresh stories straight to your inboxes every morning.

December 3 — Intro to the Houston Startup Scene & Ask Me Anything with Omair Tariq and Dr. Brittany Barreto

Are you new to the Houston tech startup community? Thinking about moving here? Trying to figure out how to plug in? Come hear a comprehensive overview from local community leaders and get a chance to introduce yourself and ask questions at the Intro to the Houston Startup Scene & Ask Me Anything. Tickets are $10.

Details: The event is from 4 to 7 pm on Tuesday, December 3, at The Cannon (1334 Brittmoore Road). Learn more.

December 3 — Houston Coalition for Equitable Development without Displacement community forum

The Houston Coalition for Equitable Development without Displacement is gathering for a second time to discuss securing a Community Benefits Agreement with Rice Management Company as they develop the 16-acre Innovation District around the old Sears building and Fiesta at the edge of Third Ward.

Details: The event is from 6 to 8 pm on Tuesday, December 3, at Wesley Chapel AME Church (2209 Emancipation Ave.). Learn more.

December 3-4 — InvestH2O 2019 Forum: Investing in Resiliency

With nearly $1 trillion in losses over the past 5-7 years for FEMA and other federal agencies, states-counties-cities, private insurance and reinsurance companies, industry and business operations from water- and weather-related incidents, the need for alternative investment and resource allocation could not be more obvious. The event's programming will be focused on innovating solutions.

InnovationMap readers can attend for free through this link.

Details: The event is from Tuesday, December 3, to Wednesday, December 4, at various locations. Learn more.

December 4 — The Cannon & EPIcenter - Jumpstart your innovation Happy Hour

In partnership with The Cannon, EPIcenter's Incubator and Accelerator will be hosting a six-week seminar using the Wendy Kennedy curriculum, "So what? Who cares? Why you?" for innovators in any industry. Director of the EPIcenter Energy Incubator and Accelerator and certified Business Coach Andi Littlejohn will lead participants through a proven methodology to discover, define and describe the commercial opportunities of innovations.

Details: The event is from 4 to 6 pm on Wednesday, December 4, at The Cannon (1334 Brittmoore Road). Learn more.

December 4 — The Ion Smart Cities Accelerator Demo Day

The Ion Smart Cities Accelerator will present its inaugural cohort of companies that are addressing the needs of Houston's people by deploying technology into the infrastructure and civic fabric that makes Houston so strong.

Details: The event is from 5 to 8 pm on Wednesday, December 4, at ion Accelerator and Prototyping Lab (1301 Fannin Street, Suite 2100). Learn more.

December 5 — Houston Region Economic Outlook

The Greater Houston Partnership's Annual Houston Region Economic Outlook event will feature Partnership Senior Vice President of Research Patrick Jankowski who will deliver the 2020 employment forecast for the region. ConocoPhillips Chief Economist Helen Currie will follow with a presentation on the national economy.

Details: The event is from 9:30 am to 1:30 pm on Thursday, December 5, at the Royal Sonesta (2222 West Loop S.). Learn more.

December 5 — Evening of Pediatric Device Innovation

Please join JLABS @ TMC for the 5th Annual Evening of Pediatric Device Innovation as top experts from Houston and across the country will discuss the latest in pediatric medical device innovation and updates on bringing a pediatric medical device to market.

Details: The event is from 3 to 6:30 pm on Thursday, December 5, at the TMC Innovation Institute (2450 Holcombe Blvd). Learn more.

December 5 — Meet & Greet with Flyover Capital

Meet Flyover Capital's Dan Kerr on his last night in town and learn how they are working to creating the next generation of technology success stories outside the coastal tech hubs.

Details: The event is from 6 to 7:30 pm on Thursday, December 5, at WeWork (708 Main Street, 3rd Floor). Learn more.

December 11 — ENRICH/LEAP Information Session

ENRICH and LEAP are 6-8 week fellowship programs where you and a team of your peers will work directly with established companies on one of a wide scope of projects. These invaluable programs allow people the ability to gain skills and insights that only professional work can offer. Come hear Enventure leadership discuss these programs and learn how you can get involved.

Details: The event is from 5:30 to 8 pm on Wednesday, December 11, at the TMC Innovation Institute (2450 Holcombe Blvd). Learn more.

December 12 — WeWork Labs x NextSeed Launch Event

WeWork Labs, a global acceleration program with a location in downtown Houston, and NextSeed, a Houston-based online investment platform, have announced a partnership set to begin in December. Together, the two entities will build a support system for Houston-based food entrepreneurs to provide workshops, programming, events, and more.

Details: The event is from 6 to 8:30 pm on Thursday, December 12, at WeWork (708 Main Street). Learn more.

December 14 — Smart Infrastructure Hackathon

On Saturday, December 14, join Microsoft and The Cannon for a smart infrastructure hackathon. Bring your own ideas and team, or join a team when you arrive. Everyone is welcome, regardless of skill level.

Details: The event is from to 9 am to 7 pm on Saturday, December 14, at The Cannon (1334 Brittmoore Road). Learn more.

December 14 — TEDxHoustonWomen 2019 : BOLD + Brilliant!

Connect with a locally rooted, globally connected community of people interested in leading the change they wish to see in the world; and sow the seeds to collaborate with innovative thinkers who catalyze ideas toward action.

Details: The event is from 10:30 am to 4 pm on Saturday, December 14, at Unity of Houston (2929 Unity Dr). Learn more.

December 17 — The Future of Work: Closing the Skills Gap

GA gathers Houston industry leaders to share how they approach the challenge of upskilling the workforce. In this discussion, we'll cover how to bridge the gap between current team capabilities and the skills needed to stay competitive. Whether radically reskilling existing teams or onboarding new talent, the companies who adapt fastest will stand the test of time.

Details: The event is from 8:30 to 11 am on Tuesday, December 17, at Station Houston (1301 Fannin Street, 21st Floor). Learn more.

The Ion Smart Cities Accelerator — named for its to-be home, The Ion — announced the 10 companies selected for the first cohort. Courtesy of Rice University

Exclusive: New Houston accelerator reveals its inaugural cohort and announces strategic partner

Smart Cities

The Ion Smart Cities Accelerator launched earlier this year with a goal of engaging startups from around the world to solve some of Houston's most prevalent challenges. Backed by Intel and Microsoft and partnered with the city of Houston and Station Houston, the program has developed a curriculum and selected its first cohort.

Ten startups from around the world — half of which from right here in Houston — were selected to be a part of the program. And narrowing down to 10 was tough for the program's judges, says Christine Galib, director of the Ion Smart Cities Accelerator.

"Selecting the participants for our first cohort was difficult, due to this amazing pool of talent — that's always the problem you want to have," she tells InnovationMap.

The program will be a 10-month process, beginning Wednesday, September 4. The accelerator's Demo Day is scheduled for December 4, and then the participants will complete a pilot program with the city from January to June, Galib says.

Based on the issues the cohort aims to solve — resilience and mobility — the program and the city of Houston decided on Near Northside as a focus for the companies.

"We focused on aligning to the needs of the city of Houston and our spotlight community, Near Northside," Galib says. "We really considered the focus areas that we have identified that were needs or challenges in the area, like aging infrastructure or health and safety."

The entrepreneurs will attend local meetings, connect with the community, and zero in on the neighborhood for solutions. This provides a more accessible avenue of integration for each of the companies' technologies and allows for the entrepreneurs to receive feedback in real time from the community.

"One of my biggest things with the accelerator is technology will be for the people, and not the other way around. We're really hoping that we can build relationships with community members in Near Northside such that they'll be able to have access to our startups and their technology in a very integrated way."

Along with this new neighborhood focus, the program also announced a partnership with the University of Houston.

"We're collaborating with the UH Technology Bridge such that professors, researchers, and startups associated with UH can have a pipeline from the world of academia and research to industry and urban planning," says Galib.

Here are 10 selected startups for the inaugural cohort.

Aatonomy

Houston-based Aatonomy has developed a device that allows for Houston drivers to instal self-driving technology in their own vehicles.

"They're basically Tesla's autopilot — but for cars we already own," Galib says.

The technology makes for safer, smarter driving around town.

AeoShape

Another homegrown company, AeoShape is in the business of compiling data and making it easier to use — from facial analysis to location-based services, the company is taking data and organizing it to more easily use it for finding solutions or strategies.

"Imagine having all the big data served up anywhere at any time in a comprehensive, visual way," Galib says.

BlocPower

Based in New York, BlocPower is connecting the dots in the consumer energy world. The startup links up with government entities, utilities contractors and more to engage IoT, machine learning, and structured finance technology to better provide clean energy in American cities.

"This is pairing the different segments in the building and infrastructure world in a way that makes sense so that they can build in an integrated way," Galib says.

GoKid

Another New York company, GoKid has a solution for carpooling. In a world so conveniently filled with ridesharing technology, busy parents still struggle to find safe rides home for their kids. The free app allows for parents to connect with one another in a way never before been optimized for school pick-up and drop-off.

"We see GoKid really working with our schools here to make ridesharing safer," Galib says. "We really like them because they were a solution for the ridesharing challenge — a lot of parents who might need carpooling services don't necessarily trust an Uber driving that they don't know."

Kriterion

Artificial intelligence company Kriterion is based in South Africa, but will soon call Houston home. The company takes AI a step further in its industry and infrastructure approach.

"We see their platform shaping three areas of Houston: waste management, power system management, and pothole detection and maintenance management," says Galib.

Sensytec

Sensytec comes out of the University of Houston and uses is technology to monitor, analyze, and quantify cement and concrete conditions.

"We thought this was pretty cool to have in our cohort because Houston is quite the concrete jungle," says Galib.

The company was also recently named a top startup in MassChallenge Texas' inaugural Houston cohort.

SlideX

Houston-based SlideX has solutions for everyone's daily struggle: Parking. The company's technology has applications for finding parking in the city — including a 3D map to help direct you — and even for paying for parking.

"They call themselves 'the next generation of intelligent parking,'" Galib says.

Umanity

San Francisco-based Umanity has created a philanthropic supply chain tool. The technology can match and map local nonprofit needs to volunteers and donations, plus provide real-time analytics.

"This is kind of the epitome of doing good and adds a very strong social enterprise and community base component to our startups," says Galib.

Wyzerr

Kentucky startup Wyzerr specializes in easy-to-use surveys.

"We think Wyzerr can provide a good feedback platform where the city of Houston, businesses, and nonprofits can easily engage with people all over the city to find out how satisfied they are with the businesses and services the city provides," Galib says.

The company's technology can be crucial for tracking KPIs and progress.

"When you're creating a Smart City, there are obviously objectives you set for what you consider to be a Smart City, but also there are ways to measure how well you're meeting those objectives," she adds.

Reality IMT

Houston-based Reality IMT is engaging the latest technology tools to digitize infrastructure.

"This really speaks to understanding our infrastructure and ways to make it safer and more efficient, and also understanding the data associated with that," says Galib.

The inaugural Smart Cities accelerator in Houston will have its cohort create solutions for a set of problems the city faces. Sky Noir Photography by Bill Dickinson/Getty Images

5 things you need to know about Houston's Microsoft- and Intel-backed accelerator program

New to town

At a Microsoft IoT in Action event in April, Mayor Sylvester Turner announced that the city would launch the Ion Smart Cities Accelerator — a program that would task a set of startups and entrepreneurs with creating digital and technical solutions to key problems within Houston.

"As a result of incorporating smart technologies, Houston will have the ability to create a more resilient and mobile-friendly city, and in turn accelerate our city's economic growth and prepare for the needs of 21st Century citizens," Mayor Turner says in a release.

While there's still a lot to finalize within this new program before the first cohort begins in September, here are the five things you need to know about the accelerator.

It's an effort from multiple parties.  

There are several major players behind the initiative. Station Houston will host the accelerator — first in its current headquarters and then later from The Ion when it opens in 2020. Station will also team up with TX/RX, a nonprofit makerspace in East Downtown, to be a resource for engineering and design elements.

Microsoft and Intel are backing the program — both monetarily and various other support roles.

"For me, having been doing this for a few years now, it's such a huge step for the city," Gabriella Rowe, CEO of Station Houston, tells InnovationMap. "We are not only talking about major companies in the world of technology to make a significant investment in our startup community, but that investment that they are making is in our city as well. That is not to be underestimated."

The first cohort's goals will be to find solutions within mobility and resilience. 

Key stakeholders within the program identified mobility and resilience as the two focus points the first cohort will work within. Currently, the stakeholders are again narrowing down the topics to identify 10 problems within mobility and resilience, which the cohort will then be tasked with solving.

The accelerator, which is currently set up to have one cohort a year, Rowe says, will then identify other various issues within Houston in subsequent cohorts.

"There will be, what seems at this point, an endless array of challenges the entrepreneurs in the accelerator can address," Rowe says.

Should the opportunity arise, Rowe says, the organization could also launch a concurrent cohort in six months, rather than waiting until next year.

The cohort will come from across the country. 

Once the list of 10 problems to solve has been finalized, the organization will go on a national search to find the cohort.

"Of course we hope we will be able to find some fabulous companies here at home, but we are also hoping we are enabling companies from around the rest of the United States to discover Houston," Rowe says.

A selection committee made up of stakeholders from all the participating organizations will evaluate the applications and selections.

"We not only want to be sure we are bringing in geographic diversity, but we also want to bring in industry diversity because that will allow challenging perspectives when problem solving," says Rowe.

A key part of this process is getting the word out about the program. Station hosted a launch event on May 30 to introduce the program to Houston.

"We can only be successful as the companies we can attract to be a part of the accelerator," Rowe says.

How it will work.

The 10-month program will have 10 startups per cohort, and the programming will be broken down into three phases. The first three months will be a time of discovery and ideating with a structured curriculum designed around mobility and resiliency. Next, the startups will prototype and validate their products. The second half of the accelerator will be pilot programs within the city of Houston.

The ultimate goal is to better Houston as a whole.

The Ion Smart Cities Accelerator is different than anything else Houston has to offer, Rowe says, mainly because its primary goal is creating solutions for some of Houston's biggest problems.

"We now finally for Houston to take the advancements we've made in innovation — especially in tech — and bring it into the lives of everyone," Rowe says. "It's wonderful in so many ways, but it puts a tremendous amount of responsibility on our shoulders to make sure we are doing this with the communities of Houston as opposed to doing it to the communities of Houston."

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Houston medtech startup clears FDA approval for new surgical tool

precision surgery

Houston-based Prana Surgical will soon bring a new electrosurgical tool to operating rooms around the country. The Prana System officially cleared U.S. Food and Drug Administration (FDA) approval earlier this month.

"Receiving FDA clearance for the Prana System represents a defining milestone for our company," Joanna Nathan, CEO and co-founder of Prana Surgical, said in a news release. "Surgeons today are increasingly focused on achieving precise outcomes while minimizing disruption to healthy tissue. The Prana System was designed to support that shift by integrating targeting and excision into a single, streamlined tool."

Prana Surgical began as Prana Thoracic in 2022. Back then, the company primarily focused on developing screening tools for lung cancer diagnosis. It raised $6 million in series A funding rounds in 2023 and 2024 before transitioning to broader surgical needs in 2025.

The Prana System is a minimally invasive, image-guided, single-use tissue extraction tool designed to retrieve samples without damaging healthy tissue. The tool is still designed with the respiratory system in mind, helping Prana in the fight against lung cancer and other thoracic diseases.

Reducing the impact of tissue extraction via electrosurgery and enhanced image scanning can significantly reduce complications. The Prana System combines localization and tissue-cutting capabilities in one, which keeps surgeons from having to swap out components during a procedure, making for a smoother process. It can core, cut and feel blood vessels on the way toward the intended target, giving surgeons greater control over tissue preservation.

"Electrosurgery is foundational to modern surgery, but there is still opportunity to improve how energy-based tools are applied in minimally invasive settings," Nathan added. "Our goal is to introduce a new class of image-guided surgical tools that enable more precise intervention across a range of procedures."

The company projects sales of $7.5 billion from the Prana System in the United States, estimating that 2.5 million surgical modules will be able to use the new tool. While starting out focused on biopsies, the company plans to evolve the system into other procedures, such as ablation, in the future. It is also planning for a controlled U.S. clinical rollout as it moves toward commercialization

Texas still ranks as No. 1 in U.S. for inbound moves, but growth dips

by the numbers

Texas continues to be the country’s No. 1 magnet for newcomers from other states, giving a boost to the state’s economy. However, Texas’ appeal weakened in 2024 compared with the previous year, due in large part to spiking home prices.

An analysis of U.S. Census Bureau data by self-storage platform StorageCafe shows Texas saw net interstate migration of 76,000 people in 2024. Texas’ net interstate migration dropped nearly 50 percent from 2023, according to the analysis. Net migration refers to the number of incoming residents minus the number of outgoing residents.

California remained the top source of newcomers for Texas, sending nearly 77,000 residents to the Lone Star State in 2024, the analysis says. Florida ranked second, followed by New York, Colorado and Illinois.

“These trends reveal Texas’ continued pull from both high-cost coastal markets and other large Sun Belt states, resulting in a mix of affordability-driven and job-driven relocation,” StorageCafe says.

Putting a damper on the influx of new residents: a roughly 124 percent surge in Texas home prices over the past decade, according to StorageCafe.

“While the state remains significantly more affordable than California, its top feeder state, the once-wide pricing gap has narrowed,” says StorageCafe. “For many movers, Texas is still a relative bargain, but no longer an undisputed one.”

Nonetheless, Texas keeps attracting young, highly educated people, which bodes well for the state’s long-term economic outlook, StorageCafe says. More than half of new arrivals to Texas in 2024 held at least a bachelor’s degree, and the age of newcomers averaged 32.

Where are most of these young, highly educated newcomers settling?

Lloyd Potter, former Texas state demographer, tells StorageCafe that population growth in Texas is happening most rapidly in suburban “ring counties” at the expense of slowing growth in urban cores. Ring counties are on the outskirts of major metro areas.

“Many people are moving from urban cores to suburban rings seeking lower costs, newer housing, better schools, and more space,” Potter says. “Typically, a move to a suburban county will be within commuting or hybrid‑commuting distance of major metro economies.”

Artemis II makes historic call to space station with help from Houston Mission Control

History in the making

Still aglow from their triumphant lunar flyby, the Artemis II astronauts made more history Tuesday, April 7: calling their friends aboard the International Space Station hundreds of thousands of miles away as they headed home from the moon.

It was the first moonship-to-spaceship radio linkup ever. NASA's Apollo crews had no off-the-planet company back in the 1960s and 1970s, the last time humanity set sail for deep space.

"We have been waiting for this like you can’t imagine,” Artemis II commander Reid Wiseman called out.

For Christina Koch on Artemis II and Jessica Meir aboard the space station, it marked a joyous space reunion despite being 230,000 miles (370,000 kilometers) apart. The two teamed up for the world's first all-female spacewalk in 2019 outside the orbiting lab.

Koch told her “astro-sister” that she'd hoped to meet up with her again in space “but I never thought it would be like this — it's amazing.”

“I'm so happy that we are back in space together,” Meir replied, “even if we are a few miles apart.”

Houston's Mission Control arranged the cosmic chitchat between the four lunar travelers and the space station's three NASA and one French residents.

Koch described being awe-struck by not just the beauty of Earth, “but how much blackness there was around it.”

“It just made it even more special. It truly emphasized how alike we are, how the same thing keeps every single person on planet Earth alive,” she told the space station crew. “The specialness and preciousness of that really is emphasized” when viewing the home planet from the moon.

By late Tuesday afternoon, the Artemis II astronauts had beamed back more than 50 gigabytes' worth of pictures and other data from the previous day's lunar rendezvous, which set a new distance record for humanity. The highlight: an Earthset photo reminiscent of Apollo 8's Earthrise shot from 1968.

"While they are inspirational and, I think, allow all of us to really feel a little bit of what they were feeling, there's also a lot of science hidden inside of those images," said Mission Control's lead lunar scientist Kelsey Young. “The conversations and the science lessons learned are just beginning."

During a debriefing with Young, the astronauts recounted how they spotted a cascade of pinpricks of light on the lunar surface from impacting cosmic debris. The flashes lasted mere milliseconds and coincided by chance with Monday evening's total solar eclipse.

Young said it was too soon to know whether the crew witnessed an actual meteor shower or more random, run-of-the-mill micrometeoroid hits. Either way, there were “audible screams of delight” in the science operations center, she said.

Koch described being awe-struck by not just the beauty of Earth, “but how much blackness there was around it.”

“It just made it even more special. It truly emphasized how alike we are, how the same thing keeps every single person on planet Earth alive,” she told the space station crew. “The specialness and preciousness of that really is emphasized” when viewing the home planet from the moon.

The first lunar explorers since Apollo 17 in 1972, Wiseman and his crew are aiming for a splashdown off the San Diego coast on Friday to wrap up the nearly 10-day test flight. The recovery ship USS John P. Murtha left port Tuesday for the target zone.

It sets the stage for next year's Artemis III, a lunar lander docking demo in orbit around Earth. Artemis IV will follow in 2028 with two astronauts attempting to land near the lunar south pole.

As for the Orion capsule’s pesky potty, Mission Control assured the astronauts that no maintenance was required Tuesday. The toilet has been on-and-off limits to the crew ever since last week’s launch, prompting them to rely on a backup bag-and-funnel system for urinating.

NASA Administrator Jared Isaacman told the crew following the lunar flyby Monday night: “We definitely have to fix some of the plumbing” ahead of the next Artemis mission. Engineers suspect a clogged filter in the overboard flushing system.

Aside from the toilet and other relatively minor matters, the mission has gone well, Isaacman noted at a news conference Tuesday, “but I'll breathe easier when we get through reentry and everybody's under chutes and in the water.”