NASA Astronaut. Scientist. Mother. Explorer. Nature lover. Currently living on-board the @Space_Station supporting Expeditions 74 and 75.
Joined June 2013
- Tweets 1,444
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- Followers 266,142
- Likes 635
644 Photos and videos
Jessica Meir retweeted
☎️ On June 9, at 7:57 a.m. CT, the Expedition 74 crew called the payload operations team at @NASA_Marshall to celebrate a major milestone. The Microgravity Science Glovebox aboard station has hit 100,000 hours of crew science and autonomous operations!
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Jessica Meir retweeted
Microbe DNA and chemistry topped Thursday's health research schedule as the Expedition 74 crew also tested a new spacesuit, packed a U.S. cargo spacecraft, and kept up lab maintenance. More... go.nasa.gov/4uAoXDB
ALT NASA astronauts Jack Hathaway and Jessica Meir, both Expedition 74 flight engineers, pose together as Hathaway shows off a pair of Advanced Space Experiment Sample Processor-4 cassettes being used aboard the International Space Station to study how weightlessness affects drug crystals possibly leading to new pharmaceutical formulas.
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Jun 11
Recognize this striking feature in the U.S.? It’s Great Salt Lake in Utah. The scale of this gem and its two‑tone color contrast make quite an impression when viewed from above. The north part of the lake is hypersaline thanks to the railroad causeway that cuts across it.
Turns out these are perfect conditions for salt-loving microbes (halophilic archaea) and pink-pigmented algae to thrive, turning the water this burgundy color – life always finds a way! The southern part of the lake receives fresh water from rivers, keeping its salinity lower, where the variety of algae is more diverse. The second photo (with Earth limb) illustrates the scale of this unique ecosystem.
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Jun 9
The Moon looks even more beautiful when it’s bathing in some Earthglow – let’s hear it for Earth Joy! Congratulations to my friends and colleagues on the Artemis III crew: @AstroKomrade, Frank Rubio, @astro_luca, and @Astro_AndreD. This mission in low Earth orbit will pave the way for our subsequent @NASAArtemis missions to land humans on the Moon.
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Jessica Meir retweeted
Expedition 74 crew members aboard the International Space Station including @NASA astronauts Jack Hathaway, Jessica Meir, and Chris Williams, as well as @ESA astronaut Sophie Adenot send their congratulations and well wishes to the four Artemis III crew members. This mission will test critical rendezvous and docking capabilities between Orion and commercial human landing systems needed to deliver astronauts to the lunar surface. More... go.nasa.gov/4ewaZ0t
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Jun 8
Even the simple act of drinking water is more fun in microgravity. Surface tension in action, science in every sip!
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Jun 7
A timelapse view from our @SpaceX Dragon of the spectacular southern aurora seen in yesterday’s post, a result of a recent solar event. As opposed to the previous aurora I’ve seen, this one danced and snaked its way directly below us, putting on quite a show. I am in awe of this ethereal and emotionally evocative phenomenon.
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Jun 6
There is a lot going on right now on the @Space_Station, but fortunately we are all safe and witnessed a spectacular southern aurora show yesterday thanks to a recent solar event.
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Jun 3
Happy hump day! Wishing all on our home planet a graceful pirouette into the rest of the week. Lookin’ good down there, Mother Earth!
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Jun 2
This photo illustrates three phenomena that surprised me when I arrived on board the @Space_Station. I didn’t realize before seeing it with my own eyes that the Earth’s atmosphere would be so visible in the night sky, seemingly even more obvious at nighttime than daytime, nor that it would be so colorful! These orange and green colors on the horizon are airglow, a faint emission of light caused by chemical reactions and interactions between UV radiation and gases in our atmosphere (unlike aurora, which is caused by solar wind particles interacting with Earth’s magnetic field, airglow is present everywhere, all of the time). I was also surprised to see how blue and well lit the Earth can be at night, when a bright Moon illuminates it (Moonglow!). This photo was taken on May 30, the day prior to the full Moon. I hope that this provides a bit more @NASAArtemis Moon Joy for all of us!
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Jessica Meir retweeted
Stem cell research, hardware installs, plant maintenance, and more topped Monday’s Expedition 74 microgravity research schedule. More… go.nasa.gov/43HUEj6
ALT NASA astronaut Jessica Meir nourishes stem cell samples inside the Kibo laboratory module’s Life Science Glovebox to help researchers learn how to manufacture space‑designed therapies to treat cancer and blood disorders. Credit: NASA/Chris Williams
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Jessica Meir retweeted
Growing stem cells in space to treat cancer and disease. 🩸🚀
Researchers are working to produce high-quality stem cells in larger quantities in space. This could improve patient outcomes for people on Earth that have blood cancers, immune diseases, and other blood disorders. go.nasa.gov/4ealC8b
ALT Jessica Meir wears a headset while handling samples inside of the Life Sciences Glovebox. The image is framed by darkness on the left and right, with the light from the glovebox illuminating Jessica's face and the work area inside the box. Her hands are inserted into the clear box through gloves, and she holds a thin, plastic rectangle with red interior.
ALT Dozens of small, white cells cover a dark grey background. There are clusters of cells that are touching, and some are spread apart. Some of the circles have brighter areas in the middle, and some appear dull as if they are further away.
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Jessica Meir retweeted
May 31
Day 106, orbit 1655 — Hello, hi to all the mums on Earth from the mums in space! We’re sending you lots and lots of love 🫶 from up here.
Happy Mother’s Day in France and across Europe!
📸 @esa / @NASA
#εpsilon • @esaspaceflight • @Space_Station
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May 29
In this timelapse of the night sky, you can see lightning storms (beginning and end), and one of my favorite night scenes – as we cross over Africa from west to east, it is very dimly lit until the snaking spectacle of light along the Nile appears (worth the wait), erupting into the brilliance of Cairo and the river delta. It’s a perfect illustration of the vitality of our planet’s water sources and how our human cultures have developed along them.
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Jessica Meir retweeted
Robotics teams installed new science gear from Dragon over the weekend, the crew advanced biotech and botany on Tuesday, and a spacewalk is set for Wednesday. More... go.nasa.gov/49qbgzn
ALT Roscosmos cosmonauts Sergey Kud-Sverchkov (left) and Sergei Mikaev (right), Expedition 74 commander and flight engineer respectively, are pictured inside the Poisk module's airlock trying on their Orlan spacesuits as NASA flight engineer Jessica Meir (center) assists them. The duo was preparing for a spacewalk to install a solar radiation experiment and remove biological exposure hardware on the outside of the International Space Station.
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May 27
Another glimpse inside the @Space_Station Life Sciences Glovebox (LSG). It was time to provide the neocartilage mentioned in last week’s post with some fresh nutrients, so yesterday I conducted a media exchange. This nifty chamber designed for space has septa on each side, so I can attach 2 syringes – one to withdraw the old media, while simultaneously injecting fresh media. The glovebox helps us prevent contamination in the chamber and also protects us and the space station atmosphere from any potentially harmful chemicals.
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May 27
Congratulations to the @BrownUniversity graduating class of 2026 from all of us on the @Space_Station! Wishing all of you and all @brown_alumni celebrating this weekend the very best of times. Fly high Brunonia, fly high!
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May 26
Behold the “space cake.” Making cakes on the @Space_Station with our rather limited “baking” supplies is an art, requiring creativity and resourcefulness. I loved making cakes for my crewmates on my first mission and considered myself adept, but our cosmonaut colleagues on Expedition 74 have certainly taken it to the next level. Here’s an example of their recent work, in celebration of 100 days in space for @astro_hathaway and @Soph_astro, and my 300th day. It tasted even better than it looked!
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Jessica Meir retweeted
May 14
I got to connect with the @Space_Station crew when I was at @NASA_Johnson. Good people doing incredible work up there.
And for the record, @StationCDRKelly’s gorilla suit is accounted for. He’ll be relieved.
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May 22
Houston, we have alfalfa! Meet the latest “Veg” experiment on-board the @Space_Station. This study is investigating interactions between plants and microbes that facilitate nitrogen fixation, a process that provides plants with the nitrogen it needs to grow. As we explore further with the @NASAArtemis program, develop a @NASAMoonBase and eventually reach Mars, such experiments will help us become sustainable space gardeners.
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