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

On the northwestern coast of Madagascar, the salty waters of the Mozambique Channel penetrate inland to join with the freshwater outflow of the Betsiboka River, forming Bombetoka Bay. via NASA https://ift.tt/34X6O8G

This image is one of several global images of the Earth at night released in 2017. via NASA https://ift.tt/3eFAT0Z

This image shows a small portion of the Gulf Stream off of South Carolina as it appeared in infrared data collected by the Landsat 8 satellite in April 2013. via NASA https://ift.tt/2RY6Zvj

Fifty years ago, on April 22, 1970, people around the world marked the first Earth Day. via NASA https://ift.tt/3eCY1xa

NASA astronaut Jessica Meir gives a thumbs up after she, Roscosmos cosmonaut Oleg Skripochka and NASA astronaut Andrew Morgan landed in their Soyuz MS-15. via NASA https://ift.tt/3ajabYu