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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
The Cygnus Loop supernova remnant (Veil Nebula)
The Cygnus Loop supernova remnant (Veil Nebula)
Release date: January 6, 1993

This is an image of a small portion of the Cygnus Loop supernova remnant, taken with the Wide Field and Planetary Camera. The Cygnus Loop marks the edge of a...

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hubbleSite press relese
Science Discovery
Double nucleus discovery
Double nucleus discovery
Release date: January 7, 1993

A double nucleus is revealed in the core of active galaxy Markarian 315.

OBJECT: Markarian 315, a so-called Seyfert galaxy

CREDIT: J. MacKenty (STScl),...

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HubbleSite press release
Historical Context
First Keck Observatory opens
First Keck Observatory opens
March 1993

Keck 1, first of the twin Keck telescopes, begins science operations atop Mauna Kea in Hawaii. Keck 2 opens in January, 1996. Both are 10-meter (33 ft)...

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About the Keck Observatory
Mission Event
First Servicing Mission (STS-61)
First Servicing Mission (STS-61)
December 2-13, 1993

As their main objective, mission astronauts install two devices—the Corrective Optics Space Telescope Axial Replacement (COSTAR), and the Wide Field...

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NASA Space Shuttle Endeavour Mission STS-61: Hubble Servicing Mission 1
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