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Space Shuttle Discovery, a plane-like object used in space which is attached to three large rockets, is soaring in the atmosphere towards space.

Discovery Launches on Final Flight STS-133

Video

Celebrating A Century of Airmail: A Discussion of the Wiseman Cooke Flight with Smithsonian Curators

February 19, 2011
A close-up view of two groups of sunspots on the Sun.

Sunspot Groups 1161 and 1162 - February 18, 2011

Disc view of the sun, with multiple groups of sunspots visible.

Sun - February 16, 2011

Disc view of the sun, with multiple prominences of plasma floating away from the Sun as well as sunspot clusters.

Sun - February 15, 2011

Balding elderly man wearing glasses stands beside a silver reflective airplane nose.

Ronald R.E.G. Davies

An image of craters on the Moon labeled with the names of the lost crew of Space Shuttle Challenger. From the top of the image to the bottom they are Scobee, Smith, McAuliffe, Resnik, Jarvis, McNair, and Onizuka.

Challenger Astronauts Memorialized on the Moon

A close perspective of the "Santa Maria" crater, a large impact-created hole, on Mars.

Color Panorama of Mars Crater 'Santa Maria'

View of full semisphere of Sun with focus on prominences of plasma across the edge of the disc.

Sun - January 19, 2011

Video

Mars Program Update

January 13, 2011
A partial view of the Sun with multiple large filaments visible as reddish-brown lines. Yellow and white spots around the sun represent areas with stronger magnetic fields.

Sun - January 1-5, 2011

Photo of the Lunar Region Explored during the Apollo 17 Mission

Lunar Region Explored during the Apollo 17 Mission

Photo of the Location of the Apollo 17 Lunar Landing Site

Location of the Apollo 17 Lunar Landing Site

Satellite image of Yellowstone

Yellowstone National Park 2011

curator Chris Moore (left) looks on as Steve Henninger (center), assisted by Paul Moore, frees the E-2C on the model of the USS Enterprise.

Curator Chris Moore with model builder Steve Henninger

A collage of the various phases of the December 2010 lunar eclipse.

Lunar Eclipse - December 2010