A hundred million years ago, a triple-star system was traveling through the bustling center of the Milky Way when it made a life-changing misstep.
Behind the Scenes Videos
Watch what it was like behind the scenes during Servicing Mission 4 with Mary Estación.
Astronauts Upgrade Hubble
STS-125: Atlantis
Images, videos and an interactive feature on the historic mission.
Featured Stories
Hyperfast Star Booted From Milky Way
NASA Finds Super-Hot Planet with Comet-Like Tail
Astronomers using Hubble have found a gas-giant planet outside our solar system that is so hot its atmosphere is escaping into space, giving it a peculiar comet-like tail.
Starburst Cluster Shows Celestial Fireworks
Like a July 4 fireworks display a young, glittering collection of stars seen by Hubble resemble an aerial burst.
Mission News
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NASA Releases Stunning Hubble Telescope 20th Anniversary Book
NASA set out on a monumental journey with the launch of the Hubble Space Telescope in April 1990. Since then, it has captured the minds and imaginations of people around the world.
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IMAX Premieres Hubble 3D on March 19
The Herschel Space Observatory has revealed the chemical fingerprints of potentially life-enabling organic molecules in the Orion nebula.
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NASA Provides Venerable Hubble Hardware to Smithsonian
Two key instruments from Hubble have a new home in the Smithsonian's National Air and Space Museum after being returned to Earth aboard space shuttle Atlantis in May 2009.
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Servicing Mission Observatory Verification (SMOV) Update
Hubble is getting closer to completing the calibrations for most of its instruments, and each day it draws nearer to becoming a fully functioning observatory again. In fact, in the upcoming weeks, Hubble will concentrate on making high-priority science observations and then finish the remaining instrument calibrations by early fall.
Hubble Accomplishments
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Age of the Universe →
Thanks in part to the Hubble Space Telescope, we know the universe is 13.7 billion years old.
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At Galaxies' Cores →
Nearly all galaxies may harbor supermassive black holes.
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How Planets Form
The Hubble Space Telescope has helped scientists determine the process of how planets are born.
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Extrasolar Organic Matter
The Hubble Space Telescope detected the first organic molecule discovered on a planet outside our solar system.
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Dark Energy →
The Hubble Space Telescope detected a distant supernova that suggests the universe only recently began speeding up.
Related Multimedia
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Return to Hubble
Coming soon to a telescope near you ...
› View This Video -
Hubble Gallery →
Hubble images of planets, stars, galaxies and more.
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Tonight's Sky →
Your guide to constellations, planets, events and more.
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Behind the Pictures →
Do Hubble pictures look like the objects would if we saw them ourselves?
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HubbleWatch →
Learn more about astronomy in our weekly Hubble Podcasts!
 "Hubble Servicing Mission 4")
World Book at NASA
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Edwin P. Hubble
The work of American astronomer Edwin Powell Hubble revolutionized our understanding of the size and structure of the universe.
Hubble Tweets
20th Anniversary Resources
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Hubble 20th Anniversary Resources
Hubble's discoveries over the course of its 20 years in orbit have made this telescope a household name. Visit this page for material related to Hubble's 20th anniversary.
