Here are three of the latest updates on new hires and promotions from these Houston organizations. Photos courtesy

It's been a busy year so far for Houston organizations — three of which have made new appointments to their leadership.

In this round up of movers and shakers in Houston innovation, a venture capital firm names its newest principal, an astronaut gets a leadership role here at ground control, and a VR studio snags a leader to steer its growth.

Joe Acaba, chief of NASA's Astronaut Office at Johnson Space Center

Joe Acaba was promoted to a new role and will be responsible for crew assignments for future spaceflight missions. Photo via NASA

NASA tapped Joe Acaba as its chief of the Astronaut Office based in Johnson Space Center in Houston. He's served on multiple spaceflights and is a former U.S. Marine and former educator. According to NASA, he's the first person of Hispanic heritage selected to lead the office.

Acaba replaces Drew Feustel, who spent two years as deputy chief and has been acting chief of the office since NASA astronaut Reid Wiseman left the post late last year.

"Joe is an experienced space flyer and a proven leader, and he will undoubtedly inspire the next generation of NASA astronauts," says NASA Administrator Bill Nelson in a news release. " As we build on the International Space Station’s unparalleled success in low-Earth orbit with our eyes on the Moon and then Mars, Joe will play an integral role in ensuring our NASA astronauts are prepared for the challenges ahead."

Acaba, who spent a total of 306 days in space, has already supported the astronaut office in a few of roles, including director of operations in Russia and chief of the Vehicle Integration Test Office. In this new role, he will be oversee astronaut resources and operations and help develop astronaut flight crew operation concepts. Additionally, Acaba will make crew assignments for future spaceflight missions, including astronauts assigned to fly on Artemis missions.

“Our Johnson Space Center team congratulates Joe Acaba on his selection to chief of the Astronaut Office. We wish him well as he takes on this new and exciting leadership role,” says NASA Johnson Space Center Director Vanessa Wyche.

Samantha Lewis, partner at Mercury Fund

Samantha Lewis was promoted to partner at Mercury Fund. Photo courtesy of Mercury Fund

Samantha Lewis was promoted to partner from principal at Houston-based venture capital firm Mercury, per her LinkedIn. She previously was the investment director of investor network GOOSE Capital before joining the Mercury team just over two years ago.

Last year, Lewis — who also served on the board of two Houston-founded startups, Syzygy and Topl — was named a member of the Class 27 of the Kauffman Fellows Program, a group of global innovation investors.

Lewis is focused on what she calls the "power theme" at Mercury, which includes fintech, blockchain, web3, and more. She told InnovationMap on a recent episode of the Houston Innovators Podcast that these industries have been hit in particular within market uncertainty.

Bob Kleinhample, senior vice president of growth at HTX Labs

Bob Kleinhample joins HTX Labs at a time of strategic growth. Photo courtesy of HTX Labs

Virtual reality studio HTX Labs has named Bob Kleinhample as the company’s senior vice president of growth. He has more than 15 years leading business efforts in the tech space. A 20-year Army veteran, Kleinhample will oversee all aspects of HTX Labs' growth — including business development, product strategy, and marketing.

“Bob brings the right balance of market knowledge and product strategy, in combination with the commitment to bring immersive training and simulation to the warfighter, to really drive our EMPACT offering into the market,” says Scott Schneider, CEO and co-founder of HTX Labs. "We’re very excited to be adding this incredibly important role to our organization and having Bob lead these efforts as we expand the usage and adoption of EMPACT across the Department of Defense."

The appointment comes after the startup raised $3.2 million in its first outside capital round.

“Last year we secured funding from Cypress Growth Capital for the sole purpose of accelerating the growth of our EMPACT platform and our customer base, and we immediately began a search for the right person to lead these growth efforts," Schneider continues. "After performing an extensive search, we are fortunate to have connected with Bob Kleinhample who is coming on board to lead our company’s growth efforts“.

Here are three of the latest updates on new execs and advisory appointments from two Houston startups and a local venture group. Photo via Getty Images

3 Houston organizations announce strategic appointments across biotech and VC

short stories

Five Houston innovators have new roles they're excited about this spring. From new advisory board members to c-level execs, here's who's moving and shaking in Houston innovation.

The Artemis Fund names new vice president of finance and operations

Adrienne Mangual has a background in finance and consulting. Photo courtesy of Artemis

The Artemis Fund, a venture capital firm that funds female-founded startups with technology solutions in fintech, e-commerce tech, and care-tech, has announced a new member of its leadership.

Adrienne Mangual is the new vice president of finance and operations at the firm, joining Artemis's co-founders and general partners, Stephanie Campbell, Leslie Goldman, and Diana Murakhovskaya, along with Austin-based Juliette Richert, a senior analyst.

Mangual received her MBA from Rice University in 2019 after working 15 years in finance roles at J.P. Morgan and Key Energy Services. Over the past few years, she's worked in consulting positions with startups and technology.

"This is an exciting time to join The Artemis Fund as the fund is growing and our reach is expanding and continuing to make an impact on female founders," Mangual tells InnovationMap. "I am looking forward to supporting existing and future female founders and working with Diana, Stephanie, and Leslie as part of the team making investment decisions for the fund."

FibroBiologics appoints scientific advisory board member

Former astronaut Kate Rubins, who's spent a total of 300 days in space, has joined the a Houston company's scientific advisory board. Photo courtesy of FibroBiologics

Houston-based clinical-stage therapeutics company FibroBiologics announced the appointment of Kathleen “Kate” Rubins, Ph.D., to its scientific advisory board. A microbiologist and NASA astronaut, Rubins has conducted medical research on earth at academic institutions as well as on board the International Space Station.

“We are honored to welcome Dr. Rubins to our SAB,” says Pete O’Heeron, CEO and chairman of FibroBiologics, in a news release. “She has distinguished herself in both terrestrial research at the Salk and Whitehead Institutes and through her ethereal work on the International Space Station.

"It’s rare to have such a unique perspective on microbiology," he continues. "Dr. Rubins joins a board of world-renowned scientists who will help to guide us as we advance fibroblast cell-based therapeutics through preclinical and clinical development. We are the only company focused on this unique opportunity in leveraging fibroblasts as treatments for chronic diseases and Dr. Rubins will be a key advisor in our pursuit to bring relief to the patients.”

In 2016, Rubins completed her first spaceflight on Expedition 48/49, where she became the first person to sequence DNA in space. Most recently, she served on the ISS as a flight engineer for Expedition 63/64. Across her two flights, she has spent a total of 300 days in space, the fourth most days in space by a U.S. female astronaut, according to the release.

Cemvita Factory hires, promotes within its leadership team

Tara Karimi, co-founder and CTO, stands with Cemvita Factory's two new hires and recently promoted employee. Photo courtesy of Cemvita

Cemvita Factory has made big moves in its leadership team. The low-carbon biotech and synthetic biology solution provider has recently made three strategic appointments: Charles Nelson was hired as chief business officer, Roger A. Harris was promoted to chief commercial officer, and Alex Juminaga was recruited as head of strain development.

“Scaling to meet market demand requires the right team at the right time,” says Tara Karimi, co-founder and CTO of Cemvita, in a news release. “With Charlie, Roger, and Alex’s leadership, we’re well-positioned for growth at a time when the demand for decarbonization solutions is greater than ever.”

With over 10 years in product development, engineering, and technology commercialization experience, Nelson will oversee all aspects of sales, business development, and customer success.

“At Cemvita, we create sustainable solutions to challenges across heavy industries,” says Nelson in the release. “Our goal is to reinvent heavy industries in ways that speak to the future, reduce companies’ carbon footprints, and even create jobs; I’m delighted to help lead the charge.”

Harris originally joined Cemvita as vice president of technology commercialization a year ago and has over two decades of experience in research and development, and engineering. In his new role, he is responsible for scaling and commercializing the startup's technology.

“Cemvita is positioned incredibly well to support heavy industry in efforts to innovate, and to help oil and gas diversify offerings and reduce dependency on carbon-intensive products,” says Harris in the release. “It is an exciting time and I’m thrilled to be with Cemvita.”

Lastly, Alex Juminaga will lead the Cemvita biofoundry’s production of novel biomolecules. He brings over a decade of laboratory experience — specializing in metabolic engineering, protein expression/purification, enzyme kinetics and binding assays, analytical chemistry, and more.

“The field of synthetic biology is just getting started, with thousands of microbes yet to be discovered,” says Juminaga. “I’m excited to work alongside the brilliant scientists at Cemvita as we uncover new microbiomes and new uses for these tiny treasures.”

Cart.com and Topl — two growing Houston startups — have made strategic appointments. Photos courtesy

2 Houston startups announce new execs to their leadership

short stories

A pair of Houston tech startups have recently announced new appointments to their leadership staff. An e-commerce company has a new chief people officer and a blockchain company named a new president to lead commercialization.

Meet Cart.com's new C-suite hire

Sara Patterson is a human resources veteran. Photo courtesy of Cart.com

Houston-based Cart.com, an end-to-end ecommerce services provider, appointed Sara Patterson as chief people officer. She will lead all aspects of the company's talent acquisition and employee experience of the fast-growing startup.

As the company grows its team and its ecommerce-as-a-service platform, it's Patterson job to forge a strong, unified culture and develop a compelling talent acquisition strategy to support continuing growth, according to a press release from Cart.com.

"Sara is one of the most accomplished and experienced HR leaders in the business. She has a real gift for talent management, and unrivaled expertise driving success for fast-growing companies across a wide range of industries," says Omair Tariq, CEO of Cart.com, in the release. "Her experience and dedication are exactly what we need as we forge a unified workforce to support our end-to-end ecommerce platform. After all, we aren't just growing our workforce at record speed. We're also building a unified culture and delivering incredible employee experiences to ensure that our entire team — from office workers to warehouse pickers — can stay laser-focused on our core goal of helping ecommerce brands to thrive."

She has three decades of experience in human resources, including serving as CPO of Lemonade, which included managing over 500 employees. She also worked as vice president of HR and head of talent management at Walmart eCommerce, which had more than 15,000 employees. She has also held senior leadership positions at Bonobos, Tribune Media, Conde Nast, Coach, and Gilt.

"People are the key to success for any growing company, and I'm thrilled to be joining one of the fastest-growing and most transformative companies in the ecommerce space," Patterson says in the release. "Cart.com's leaders have made it clear that they see a strong culture as the key to lasting success, and I couldn't agree more. I'm delighted to be joining such a talented team, and supporting their continuing mission to unlock scalable growth for ecommerce brands."

Here's who will lead commercialization for Topl

Tim Marx has transitioned from adviser to employee at Topl. Photo courtesy of Topl

Tim Marx has joined Topl as president, the company recently announced. Marx will lead Topl's commercialization efforts and scaling. He previously supported the blockchain company as adviser.

A Fulbright Scholar, Stanford MBA, and former Boston Consulting Group partner and managing director, Marx has consulted on the ground in more than 20 countries, including those of Latin America, Europe, and Asia. He will continue to support Baird Capital as a venture partner, which he has since 2018.

"My overall thesis for getting involved in Topl is that I finally saw a really solid business use case versus a classic solution looking for a problem to solve," Marx says.

To learn more about him, read his recent Topl team member blog.

Optellum, Liongard, and Cart.com have hired new members to their executive teams. Photos courtesy

Updated: 3 Houston startups make strategic C-suite hires

short stories

A handful of Houston tech startups have recently announced new appointments to their C-suites. A med tech company with its national headquarters in Houston has a new leader, a Houston software has a new exec focused on strategy, and a e-commerce company has a new chief revenue officer.

Optellum names new CEO

Jason Pesterfield will lead United States operations for Optellum. Photo courtesy of Optellum

Optellum, a medical software startup based in the United Kingdom and has its United States HQ in Houston, has appointed Jason Pesterfield as CEO to lead growth in the U.S. clinical market. Optellum AI-based software enhances early lung cancer diagnosis and therapy with its medical device software platform, Virtual Nodule Clinic.

Pesterfield was previously the president and CEO of Veran Medical Technologies, a leader in image-guided lung cancer diagnosis. He brings 25 years of leadership experience in the medtech sector. Optellum was founded by Václav Potěšil, Lyndsey Pickup, Timor Kadir, Professor Sir Mike Brady, and Jérôme Declerck.

"It took us almost a year to find the right successor who shares our vision and has the right expertise to take Optellum on to the next stage of growth," says Potěšil in a news release. "I am really excited to work with Jason, to make Optellum's platform available to every clinician in the USA and around the world, and to help them diagnose their lung cancer patients as early as possible. With Jason on board, I can focus on advancing Optellum's vision to transform early lung cancer therapy through partnerships that harness the power of AI software combined with molecular diagnostics, robotics and interventional devices, and drugs."

Liongard announces chief strategy officer

Patrick Schneidau is the chief strategy officer for Liongard. Photo courtesy

​Houston software-as-a-service company, Liongard, has named Patrick Schneidau as chief strategy officer. The company, founded in 2015, was a 2021 InnovationMap Awards finalist and reported that the team was looking to expand by around 70 new hires over the next year.

"Liongard is an incredible Houston growth story," Schneidau tells InnovationMap. "Our founders, Joe Alapat and Vincent Tran, have built a first-class team that allow technology service providers to operate at 10x by providing unprecedented insight and data into the systems deployed in the modern IT stack. In a rapidly growing market, they are quickly becoming 'must have' technology. I'm excited to join to team to accelerate their growth into new markets and with new products."

Schneidau spent over a decade at Houston-based PROS before serving in C-level positions at two other Houston startups — Commtrex and Truss. He's also previously served as talent committee chair for Houston Exponential.

Cart.com hires a new chief revenue officer

Randy Ray is Cart.com's first chief revenue officer. Photo courtesy of Cart.com

Fresh off its $98 million series B, Cart.com has named its first chief revenue officer. Randy Ray is tasked with driving sales growth across the company. He has over 15 years of sales and operations experience and was previously senior vice president at supply-chain solution provider High Jump.

"I've worked with the world's biggest retail and SaaS brands, and I've seen the need for a unified Ecommerce-as-a-Service hub to create operational efficiencies and unlock scalable success," Ray says in a press release. "I'm a firm believer in the Cart.com mission to drive success for online brands, and I'm looking forward to tripling our sales organization and building out a world-class revenue infrastructure as we take the company global over the next 6 to 9 months."

Here are three of the latest updates on new execs and advisory appointments from Houston startups. Photo via Getty Images

3 Houston startups announce strategic appointments across health tech, materials, and software

short stories

Three Houston tech startups have new hires they're excited about this summer. From new board members to c-level execs, here's who's moving and shaking in Houston innovation.

Former Memorial Hermann CEO joins board of ZIBRIO

This Houston medical device startup has added a big name to its board. Photo courtesy of ZIBRIO

Dan Wolterman, who served as president and CEO of Memorial Hermann Health System for 15 years, has been named to the board of directors of Houston-based ZIBRIO. The health tech company, which was founded based on NASA technology, has developed a device that measures balance.

"We're delighted to have Dan on the team," says Katharine Forth, ZIBRIO CEO and co-founder, in a news release. "He understands ZIBRIO's vision to work across the full continuum of care, empowering older patients and clinicians with quantifiable fall prevention. His experience and enthusiasm will be invaluable in helping us to achieve it."

Falling is the top cause of trauma injury and trauma death across all age groups, according to ZIBRIO's release, and the current cost of falls in people over 65 is $50 billion – which is expected to double.

"ZIBRIO is coming to market at a time when population health and prevention are key for Healthcare systems to generate outcomes. They have a strong team and an elegant solution to a complex problem that will help millions," Wolterman says in the release.

Inhance adds to its C-suite

Inhance Technologies has added an integral member to its leadership. Photo via inhancetechnologies.com

Inhance Technologies, an international provider of polymer material science solutions based in Houston, has named its new CFO. Andrew Leeser, previously at Cimarron Energy, has joined the company to lead global finance, accounting and treasury functions, as well as human resources and information technology.

"I'm delighted to welcome Andrew to the Inhance Technologies family. He has an excellent track record in organizations spanning a range of industries, and I'm sure that his experience will help us continue on our upward trajectory," says Andrew Thompson, president and CEO of Inhance Technologies, in a news release. "We look forward to working with him to build a bright future for the company and our customers as we help them make a conscious choice towards more sustainable plastics."

The company just recently announced its expansion, including another new C-level exec and a new 75,000-square-foot site in St. Louis.

"I'm very pleased to have joined Inhance Technologies and I look forward to helping the organization achieve its goals over the next few years. With the significant growth in demand for our fully recyclable barrier technology Enkaseä, as well as our global expansion, there is no doubt I'm joining the company at an exciting time," says Leeser in the release.

Houston fintech unicorn names new council

Meet the new council dedicated to supporting HighRadius's new platform. Photo via LinkedIn

HighRadius, a Houston-based fintech company that reached unicorn status last year, has announced the members of its advisory council for its new microlearning and community platform Highako Academy.

Bob Shultz, managing partner of Quote-to-Cash Consulting, will serve as chairman of the council.

Other council members include:

  • John LaRocca, Sr. Director of Global Credit, Hitachi Vantara
  • Roger Torneden, Director of Business, Management and Legal Programs for UCLA Extension
  • R. Britt Hastey, Chair, Business Administration Department, Los Angeles City College
  • Bruce Lynn, Managing Partner, the FENG LLC
  • Scott Blakeley, Partner, Blakeley LLP

The council "will identify and improve courseware, certification programs and the methods of delivery based on current and future industry and professional trends," according to an email from the company. Highako Academy is aimed at helping teams and customers develop critical industry skills.

"Our customers have asked us for an online self-service learning platform, and that led us to launch highako.com as a beta platform last year," says Urvish Vashi of HighRadius in a recent release. "With 10,000+ users on the platform and a vibrant partner ecosystem consisting of credit groups, collection agencies, attorneys and industry associations, we see this echoing a larger trend of millennials and Gen Z gravitating towards microlearning platforms."

These fast-growing companies have new personnel announcements to share. Photos courtesy

3 Houston tech startups name new leadership members

SHORT STORIES

Three Houston startups have new hires they're excited about. From new board members to C-level execs, here's who's moving and shaking in Houston innovation.

Software company hires new product exec

Photo courtesy of Cart.com

Cart.com, an end-to-end e-commerce services provider, announced Michael Svatek as the company's first chief product officer. Formerly, Svatek served as chief product and strategy officer at Bazaarvoice and then co-founded and served as the CEO and head of product at Rivet Works, a cloud software platform.

"Michael's deep expertise across the e-commerce technology value chain coupled with his experience in M&A, strategic alliances, and entrepreneurship are one-of-a-kind in this industry, and a testament to our growth and trajectory at Cart.com," says Omair Tariq, Cart.com co-founder and CEO, in a news release. "We are so pleased to welcome Michael, a proven leader with an innate understanding of the Cart.com mission to unify and streamline the fragmented e-commerce value chain for brands of any size."

Earlier this year, Cart.com raised a $25 million series A funding round and emerged from stealth mode.

Fast-growing e-commerce startup lawyers up

Photo courtesy of GoExpedi

Houston-based GoExpedi, another tech company disrupting e-commerce, once again expanded its executive board, naming Julie Gremillion as general counsel. She has more than 10 years of experience in working with energy companies, and will lead the company's legal strategy, managing compliance and risk throughout the organization, and more.

"We are thrilled to have found Julie, one of the most experienced, savvy and well-rounded legal counsels in the industry," says Tim Neal, GoExpedi CEO, in a news release. "Her legal background in the energy space is beyond reproach. As we enter this next critical phase of growth, Julie's combined commercial and legal expertise will provide us with a platform for long-term and sustainable success."

GoExpedi also recently fundraised a $25 million round last fall.

Recently acquired therapeutics company adds board member

Photo via aiche.org

Clinical-stage biotechnology company, Coya Therapeutics Inc. has appointed Ann Lee., senior vice president of Cell Therapy Development and Operations at Bristol Myers Squibb, to the company's board of directors.

"Dr. Lee is one of the leading cell therapy technical development, supply chain and manufacturing executives in the biopharmaceutical industry," says Howard Berman, Coya CEO, says in a release. "At Coya, we are revolutionizing cell therapy manufacturing and supply chain management via proprietary cryopreservation to overcome prior limitations of Treg cell therapies. Dr. Lee's expertise will be instrumental as we advance in the clinic and build out manufacturing partnerships."

The company, which focuses on creating therapeutics for neurodegenerative and autoimmune diseases, announced earlier this year that it has completed a merger with Nicoya Health Inc. and raised $10 million in its series A.

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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.”