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#OTD 16 years ago, NASA's Lunar Reconnaissance Orbiter launched to the Moon. Since then, it has created a 3D map of the entire Moon, detected deposits of water ice, and is paving the way for future lunar exploration with #Artemis. More about the Moon: go.nasa.gov/4lbTrr2

"I consider exploring as central to life as breathing." —Sally Ride #OTD in 1983, Space Shuttle Challenger roared into the heavens for its second space expedition. Among STS-7's five-person crew, Challenger carried the first female American astronaut, Sally K. Ride, a true

Take a minute to enjoy the view It's the solstice today... again! Didn't we just have one? What better reminder to pause and reflect on where we are. 📷 View of the Hawaiian Islands seen from the deck of space shuttle Discovery taken 40 years ago during the STS-51G mission.

Staring at the Sun ☀️ 50 years ago today, OSO-8, the final spacecraft in NASA's Orbiting Solar Observatory series was launched. The OSO set of satellites were the first dedicated to going beyond the atmosphere to study our Sun. About the history of studying the Sun from space:

Making tough choices In every organization, leaders must step up to make critical decisions for the future. In our brand new edition of NASA History News & Notes, go.nasa.gov/3G0hR8b, the History Office highlights examples of leadership and decision-making from NASA's past.

When STS-51G touched down #OTD 40 years ago, Shannon Lucid's first spaceflight came to an end. But it was not her last! Dr. Lucid completed four more spaceflights and logged 223 days in space. She also served as NASA's Chief Scientist. 👩‍🚀 go.nasa.gov/4l9AaXp

John Casani was a true deep space pioneer 💫 After joining JPL in 1956, John worked as an electronics engineer on some of the nation's earliest spacecraft. Later, he served as project manager for Voyager, Galileo, and Cassini. More on his legacy: jpl.nasa.gov/news/john-casa…

Before the full-sized M2-F2 and Hyper III experimental aircraft took to the skies, engineers at what is now NASA Armstrong tested models launched from a remote-control mothership (yellow). Can you distinguish the Hyper III shapes from the M2-F2 in this photo taken #OTD in 1968?

When the beach is your research laboratory 🏖️ 80 years ago #OTD: The first rocket launch from Wallops Island, Virginia. This 1945 event marked the dawn of the site's important role in aerospace research and exploration. More NASA Wallops history go.nasa.gov/4n0puMB

Untangling the mysteries of our planet 🌏 STS-4, launched #OTD in 1982, was the final test flight of the space shuttle Columbia. As part of the mission, commander T.K. Mattingly used this camera (after untangling the cord) to record lightning strikes ⚡ on Earth. Scientists

60 years ago today, 32-year-old Joe Engle flew the X-15 to 280,600 feet (53 mi or 85.5 km), becoming the youngest US pilot to qualify as an astronaut (according to the US Armed Forces definition). Engle was selected as a NASA astronaut the next year: go.nasa.gov/4keHGzu

Failure was not an option "Apollo 13," Ron Howard's movie based on the actual events of NASA's Apollo 13 mission in 1970, was released in theaters 30 years ago today! NASA helped out during the making of the film, including lending its KC-135 aircraft or "Vomit Comet" to film

This #AsteroidDay (on the anniversary of the Tunguska Event), why not take a deep dive into the history of asteroid studies and planetary defense? Check out the free e-book: A History of Near-Earth Objects Research ☄️ go.nasa.gov/44htHTy

Happy birthday to us! 🎈🎈🎈 #OTD in 1976, we opened our Museum in DC in style: A signal from the Viking 1 spacecraft orbiting Mars triggered the ribbon cutting!

Today marks 65 years of #NASAMarshall 🎉 Since we opened our doors #OTD in 1960, Marshall teams have pursued science, engineering, and human spaceflight advances for the benefit of all. 🥳 Celebrate our anniversary with us: go.nasa.gov/44ovDti

30 years ago this week, a space shuttle docked with the Mir space station for the first time. In this photo taken from Mir, we see Atlantis's aft cargo bay with the Spacelab science module. Inside, STS-71 and Mir-18 crews were busy performing life science research.

Happiest of birthdays to Apollo 17 moonwalker Harrison "Jack" Schmitt, who turns 90 today! 🥳 60 years ago, Schmitt was announced as one of NASA's fourth group of astronaut candidates: "The Scientists." Schmitt's geology expertise combined with the unique features of the

On the 4th of July in 1982, thousands of spectators flocked to the California desert for a special event! Astronauts TK Mattingly and Hank Hartsfield made a perfect landing of the Columbia orbiter as STS-4, the final test flight of the Space Shuttle, ended #OTD in 1982.