Several hundred million years ago, two galaxy clusters collided and then passed through each other. via NASA https://ift.tt/2LlhrcC

NASA astronaut Ricky Arnold takes an out of this world “space-selfie” while conducting a spacewalk on March 29, 2018. via NASA https://ift.tt/2YJCzRy

This composite of the Crab Nebula was made with data from the Chandra X-Ray Observatory (blue and white), Hubble Space Telescope (purple), and Spitzer Space Telescope (pink). via NASA https://ift.tt/2WIqny3

It’s Teacher Appreciation Week and teachers and space travel go hand-in-hand. via NASA https://ift.tt/3c0QaaU

Sang Choi has worked for NASA for nearly 40 years. Since beginning work at the Langley Research Center in October 1980, Choi has received 71 awards from the agency. via NASA https://ift.tt/2WkG8uA

Dark matter, although invisible, makes up most of the universe’s mass and creates its underlying structure. via NASA https://ift.tt/35i4vgE

The Mars Helicopter, a small, autonomous rotorcraft, will travel with NASA’s Mars Perseverance rover, currently scheduled to launch in July 2020. via NASA https://ift.tt/3bOe0GT

On April 25, 1990, the Hubble Space Telescope was deployed from the cargo bay of space shuttle Discovery. via NASA https://ift.tt/2y6EiFF

On Friday, April 24, 2020, NASA Administrator Jim Bridenstine visited the White House to brief President Trump on NASA’s fight to alleviate COVID-19. via NASA https://ift.tt/2KDmoNp

The Susquehanna River cuts through the folds of the Valley-and-Ridge province of the Appalachian Mountains in this photograph taken by the crew of the International Space Station. via NASA https://ift.tt/2xVzL90