In this Exploring Space Lecture, Caltech astronomer Mike Brown will discuss the recent suggestion of evidence of a massive ninth planet in the outer solar system and the massive worldwide search to find this latest member of our planetary family.

Tune in to the live webcast on Air and Space Live.
In this Exploring Space Lecture Caltech astronomer Mike Brown will discuss the

Live Webcast - Planet Nine From Outer Space

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We're live from our Udvar-Hazy Center talking about World War I. Ask your questions in the comments section, and we'll get to as many as we can!
Jack Macray
Jack Macray
27 Years Ago Today: the Hubble Space Telescope was placed in orbit from Space Shuttle Discovery: [ S.si.edu Link ]

Image Credit: NASA
27 Years Ago Today the Hubble Space Telescope was placed in orbit
Bill Toomey
Maxwell D Taylor
This plane, the Nemesis NXT was designed by Jon and Patricia Sharp and is also known as the "pink beast." It dominated the competition at the 2009 National Championship Air Races with a “record a day, and two on Sunday.” With a top speed of 415.75 mph, it was retired from competition after earning four world speed records in 2015.

The Sharps will be at the Museum in Washington, DC on May 3...
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This plane the Nemesis NXT was designed by Jon and Patricia Sharp
Joseph Arias
The Hubble Space Telescope was launched on Space Shuttle Discovery (STS-31) this day in 1990. This full-scale engineering test model was built for testing purposes before construction of the Hubble Space Telescope now in orbit. Hubble has shown us dramatic images of planets, distant stars, and galaxies, and enabled discoveries that have changed our theories about the universe. Have images...
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The Hubble Space Telescope was launched on Space Shuttle Discovery STS31 this
Jason C. Loewen
Bill Osborne
Michael Davis
This week's Ask an Expert on Facebook Live will explore the early history of American military aviation and its unpreparedness for participation in World War I. Tune in on the National Air and Space Museum, Steven F. Udvar-Hazy Center, Smithsonian Facebook page this Wednesday at 12:30 ET.
This weeks Ask an Expert on Facebook Live will explore the early

Ask an Expert on Facebook Live: WWI Aviation

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Happy #EarthDay! This photo was taken by the Apollo 17 astronauts while en route to the Moon on December 7, 1972. This first view of the whole Earth from space has become one of the most iconic and widely distributed images in existence. It has been used by environmental activists, politicians, and scientists to illustrate the fragility of our home planet and the need to protect it and the...
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Happy EarthDay This photo was taken by the Apollo 17 astronauts while
Sherry Snyder
Ryan O' Connell
Gregory Eberly
Our new exhibition, “Artist Soldiers: Artistic Expression in the First World War,” reveals the compelling, and very human, story of WWI through rarely-seen artwork created by the people who lived through it.

Now, you can explore part of the exhibition online: [ S.si.edu Link ]
Howard Hughes spent three years and nearly four million dollars creating his aviation classic "Hell's Angels". Production included a recast lead and a plane crash by Hughes. Read about the making of one of the first blockbuster actions films on our website: [ S.si.edu Link ].

Join us tomorrow night for a screening of the film at the Museum in Washington, DC, and the Udvar-Hazy Center in...
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Howard Hughes spent three years and nearly four million dollars creating his
Paul A. Seelentag
Ross Gerard
Did you know that Jupiter is wider than 11 Earths side by side and has more mass than all the other seven planets combined? Learn more about this giant among giants in our latest blog post: [ S.si.edu Link ]

Or tune in live for our lecture "Juno: Mission to Jupiter" tonight at 8:00 pm (ET) - [ S.si.edu Link ]
Did you know that Jupiter is wider than 11 Earths side by
Sunni Huffhines Nix
Jim Aleshire
Jim Aleshire
We’re live for Ask an Expert talking about the very first Earth Day
National Air and Space Museum, Smithsonian Institution
Pawan Kumar Verma Lally
Glenn Chatfield
Celebrate Earth Day early today with two live online programs. Right here on our Facebook page and on Air and Space Live: airandspace.si.edu/live
Celebrate Earth Day early today with two live online programs Right here
Beau E. Gros
Afaf Alawneh
Five years ago today, we welcomed Space Shuttle Discovery to the Smithsonian. The first orbiter retired from NASA’s shuttle fleet, Discovery completed 39 missions, spent 365 days in space, orbited the Earth 5,830 times, and traveled 148,211,675 miles.

Image Caption: Space Shuttles Enterprise, left, and Discovery, right, are pictured here meeting nose-to-nose at the beginning of a transfer...
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Five years ago today we welcomed Space Shuttle Discovery to the Smithsonian
Patti Rodgers
Barry Thomas
Andrew Boyce
75 Years Ago Today: Legendary pilot Jimmy Doolittle led sixteen B-25 bombers on the first American aerial assault against the Japanese mainland during World War II– known as the Doolittle Raid. For this high-risk mission, Doolittle received the Medal of Honor.

Learn more about Jimmy Doolittle: [ Bit.ly Link ]
75 Years Ago Today Legendary pilot Jimmy Doolittle led sixteen B25 bombers
Dee Force
Federico Hill
Gary Prost
Live webcast tomorrow at 1 pm ET. Kathy Sullivan, a former astronaut and recent administrator of the National Oceanic and Atmospheric Administration (NOAA), will share her perspective on visual observations of our changing planet, the importance of satellite technologies in looking at Earth through multiple lenses, and how all that data can be combined and shared on a global scale.
Live webcast tomorrow at 1 pm ET Kathy Sullivan a former astronaut

Celebrating Earth Day with Kathy Sullivan

s.si.edu
Luciano Scandelli
Afaf Alawneh
Abigail Cobb
Tomorrow at 12:30, join us for this week's Ask an Expert on Facebook Live about the first Earth Day in 1970. Tune in on our Facebook page.
Tomorrow at 1230 join us for this weeks Ask an Expert on

Ask an Expert on Facebook Live: The First “Earth Day”

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Today in 1964: Jerrie Mock became the first woman to pilot an aircraft around the world. She departed from Columbus, Ohio, on March 19, 1964 in the Cessna 180 "Spirit of Columbus" and arrived back home after flying 36,964 kilometers (23,103 miles) in 29 days, 11 hours, and 59 minutes. See her aircraft on display at our Udvar-Hazy Center: [ Bit.ly Link ]
Today in 1964 Jerrie Mock became the first woman to pilot an
Carlos Garcia
Shirley Sanchez
Sherry Wells
This Thursday, watch our live webcast as Scott Bolton, principal investigator for the Juno mission to Jupiter, talks about the orbiter’s quest to unlock Jupiter's secrets and understand the origin and evolution of the gigantic planet.
This Thursday watch our live webcast as Scott Bolton principal investigator for

Live Webcast - Juno: Mission to Jupiter

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Howard Paul
Did you #spottheshuttle? Five years ago today, Space Shuttle Discovery atop NASA's Shuttle Carrier Aircraft (SCA) flew over the National Mall in Washington, DC and then made several low passes over our Udvar-Hazy Center in Chantilly, VA before landing at Washington Dulles International Airport.

Image Credit: NASA
Did you spottheshuttle Five years ago today Space Shuttle Discovery atop NASAs
Danny Durward
Yvonne J Destout
Jonathan Miksch
45 Year Ago Today: Apollo 16 launched carrying astronauts John Young, Ken Mattingly, and Charlie Duke to the Moon. Apollo 16 was the fifth mission to land people on the Moon and return them to Earth. It was also the second flight of the Lunar Roving Vehicle. Learn more about the mission: [ Bit.ly Link ]

Image Credit: NASA
45 Year Ago Today Apollo 16 launched carrying astronauts John Young Ken
John Chambers
Stuart Goodburn
Sal Aguirre