A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen on the launch pad at Launch Complex 39A at sunrise as preparations continue for the Demo-2 mission, Wednesday, May 27, 2020.

In this iconic image, Staion Commander Leroy Chiao of NASA watches a water bubble float between him and the camera.

A SpaceX Falcon 9 rocket with the company’s Crew Dragon spacecraft onboard is seen as it is rolled out of the horizontal integration facility at Launch Complex 39A as preparations continue for the Demo-2 mission.

Annie and John Glenn arrive at the Mission Control Center for the Gemini IV launch on June 4, 1965. John Glenn was the first American to orbit the Earth.

Chemist Audrey Miyamoto preparing an Apollo lunar sample to analyze for amino acids at NASA’s Ames Research Center.

The crew of the International Space Station snapped this image of this typhoon in the South Pacific Ocean on May 13, 2020.

Nancy Grace Roman (1925-2018), NASA’s first chief astronomer, is known as the ‘Mother of Hubble.’

NASA’s Juno mission captured this look at Jupiter’s tumultuous northern regions during the spacecraft’s close approach to the planet on Feb. 17, 2020.

Northrup Grumman’s Cygnus resupply ship is pictured in the grips of the Canadarm2 robotic arm moments before its release ending its 83-day stay at the International Space Station on May 11, 2020.

Iowa native astronaut Raja Chari was selected by NASA to join the 2017 Astronaut Candidate Class.