This is the last tweet at ISS astronaut Christina Koch made just before coming back to Earth. Referring to a US poet’s poem and a beautiful starry night sky, she expressed her feeling of going to space and coming back to Earth. Happy 50th Earth Day on April 22!

“We saw to the edge of all there is—
So brutal and alive it seemed to comprehend us back.”
-Tracy K. Smith, US Poet Laureate

Credit: Christina Koch, NASA

Reference: Christina Koch’s Tweet
See earthview photo gallery: LiVEARTH