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First all-female spacewalk: Two stars shining bright

I'm not crying, you're crying.

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NASA astronauts Jessica Meir and Christina Koch prepare on the International Space Station for the first all-female spacewalk.

NASA

As astronauts Christina Koch and Jessica Meir made history on Friday during the first all-female spacewalk, people on social media got seriously emotional. The hashtag #AllFemaleSpacewalk trended on Twitter, and NASA's livestream of the spacewalk trended on YouTube. The pair spent more than seven hours outside the International Space Station working to replace a failed power unit, among other tasks. 

Some people noted they were surprised by the emotional impact of seeing Koch and Meir work outside the ISS, while others shared pictures of their daughters watching the spacewalk.

"I didn't expect to be emotionally affected by the #AllWomanSpacewalk, but when I just tuned in to hear female voices paired with the sight of people working in space suits, it got real dusty in this room - I'd never seen that before," said one person on Twitter. "These women are role models, and that matters."

Many people, including President Donald Trump, took time to note the historic nature of this spacewalk and how it'll affect the future. 

"I just want to congratulate you, what you do is incredible," Trump told the astronauts in a surprise call from the White House. 

Fellow astronauts also offered up words of encouragement and congratulations. 

"So proud of my astrosisters @Astro_Christina and @Astro_Jessica," tweeted fellow NASA astronaut Andrew Morgan. "We've been training together since our selection in 2013, and now they're out on a history-making spacewalk!" 

Some in the tech world also took note of the spacewalk.

"Very inspiring to see the historic #AllWomanSpacewalk - hopefully just the first of many to come. Congrats @Astro_Christina and @Astro_Jessica on your success today!," tweeted Google CEO Sundar Pichai

Their work officially started at 4:38 a.m. PT. and concluded around 11:50 a.m. PT. This was Koch's fourth spacewalk, and Meir's first.

Originally published Oct. 18, 8:13 a.m. PT.
Update, 12:58 p.m.: Adds more reactions and notes that the spacewalk was completed.