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Before 1995, astronomers were only certain of the nine planets in our solar system. Since then, they have found dozens of planets orbiting other stars.
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+ More NASA Facts...
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Odd Twist Near Milky Way Center
03.15.06 - Astronomers report an unprecedented elongated double helix nebula near the center of our Milky Way galaxy, using observations from NASA's Spitzer Space Telescope. The part of the nebula the astronomers observed stretches 80 light years in length.
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+ Full release from UCLA
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| Wide Field Planetary Camera 2
Launches: April 24, 1990; December 2, 1993
These two instruments served as the main camera capturing pictures on NASA's Hubble Space Telescope.
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| Keck Interferometer
First light: March 2001
The Keck Interferometer links two 10-meter (33-foot) telescopes, forming the world's most powerful optical telescope system.
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| Galaxy Evolution Explorer
Launch: April 28, 2003
This mission uses ultraviolet wavelengths to measure the history of star formation.
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| Spitzer Space Telescope
Launch: August 25, 2003, ET (August 24 PT)
Formerly known as the Space Infrared Telescope Facility, Spitzer is using infrared technology to study celestial objects that are hidden from view. The mission is part of NASA's Great Observatories Program.
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Spitzer Captures Echo of Dead Star
An enormous light echo etched in the sky by a fitful dead star was spotted by the infrared eyes of NASA's Spitzer Space Telescope.
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Galaxy Evolution Explorer Turns Two
See the universe in the ultraviolet.
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