Koch's contributions to science could be even more far-reaching.
As NASA gears up for the next generation of lunar missions and eventual Mars missions, studying how microgravity affects the body will be crucial as longer spaceflights could become the norm. But how much any one person is affected varies, due in part to their weight.
An electrical engineer who also has a degree in physics, she said she was "lucky" to have adapted to life back on earth without any issues.More news: Landmark case says Aboriginal Australians cannot be deported
"It just looked exactly like you might see in the pictures except way more brighter, way more real, and I literally exclaimed, I just said, 'Oh my goodness!' It was just phenomenal, and it was that moment when I realized I had just left our planet", Koch said.
Since her return to earth February 6th, Koch said she has enjoyed reuniting with her family and dog and eating chips and salsa. But overall, she described it as a "pretty easy transition back". In 2016, NASA astronaut Scott Kelly returned to Earth after 340 days on the ISS.
For almost 20 years, astronauts have continuously lived and work on the space station, testing technologies, performing science and developing the skills needed to explore farther from Earth. Scientists also found microgravity can damage DNA, thicken artery walls and change the microbiome from their research on the Kelly brothers.More news: Child dies from the flu at Ruby Memorial Hospital over the weekend
"We are celebrating our 20th year of continuous presence aboard the International Space Station in low Earth orbit this season, and we are on the point of sending the first girl and next guy to the moon 2024", said NASA Administrator Jim Bridenstine.
During a NASA press call Wednesday, Koch recalled what it was like to see Earth from space. The astronaut deserved the warm welcome, considering that she had just made history for the longest space mission ever performed by a woman.More news: NASA looking for astronauts to expand its crewed space missions
This time, when she saw the ocean, she wasn't floating above it 200 miles away in space.