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A chronology of the Hubble Space Telescope Illustrates the mission's history from conception through its 25 years of ground-breaking observations and discoveries.
Significant Image
Barred spiral galaxy NGC 1300
Barred spiral galaxy NGC 1300
Release date: January 10, 2005

The Hubble telescope captures a display of starlight, glowing gas, and silhouetted dark clouds of interstellar dust in this beautiful image of NGC 1300. NGC...

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HubbleSite press release
Milestone Release
Hubble celebrates 15 years in orbit
Hubble celebrates 15 years in orbit
April 24, 2005

During the 15 years NASA’s Hubble Space Telescope has orbited the Earth, it has taken more than 700,000 photos of the cosmos; images that have awed,...

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HubbleSite press release
Significant Image
Whirlpool Galaxy (M51)
Whirlpool Galaxy (M51)
Release date: April 25, 2005

The Whirlpool's most striking feature is its two curving arms, a hallmark of so-called grand-design spiral galaxies. The arms are star-formation factories,...

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HubbleSite press release
Historical Context
Deep Impact mission impacts comet Tempel 1
Deep Impact mission impacts comet Tempel 1
July 4, 2005

After 172 days and 431 million kilometers (268 million miles) of deep space stalking, Deep Impact successfully reached out and touched comet Tempel 1. The...

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NASA press release
Historical Context
Shuttle fleet returns to flight
Shuttle fleet returns to flight
July 26, 2005

Space shuttle Discovery mission STS-114 launches from NASA's Kennedy Space Center, ending a two-and-a-half year wait for the historic "Return to Flight"...

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NASA Space Shuttle Discovery Mission STS-114
Mission Event
Hubble begins "two-gyro" science operations
Hubble begins "two-gyro" science operations
Release date: August 31, 2005

Hubble engineers shut down one of the three operational gyroscopes aboard the observatory to preserve the operating life of the third gyro and extend...

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HubbleSIte press release
Science Discovery
Two moons discovered around Pluto
Two moons discovered around Pluto
Release date: October 31, 2005

Two new moons, Nix and Hydra, are roughly 5,000 times fainter than Pluto and are about two to three times farther from Pluto than its large moon, Charon,...

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HubbleSite press release
Significant Image
Mosaic of the Crab Nebula
Mosaic of the Crab Nebula
Release date: December 1, 2005

The Crab Nebula is a six-light-year-wide expanding remnant of a star's supernova explosion. The colors in the image indicate the different elements that were...

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HubbleSite press release
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