Gamma Ray Burst GRB990123

A NASA/ESA Hubble Space Telescope view of the rapidly fading visible-light fireball from the most powerful cosmic explosion recorded to date. For a brief moment the light from the blast was equal to the radiance of 100 million billion stars. The initial explosion began as an intense burst of gamma-rays which happened on Jan. 23, 1999.

The blast had already faded to one four-millionth of its original brightness when Hubble made observations on February 8 and 9. Space Telescope captured the fading fireball embedded in a galaxy located 2/3 of the way to the horizon of the observable universe.


Andrew Fruchter (STScI) and NASA/ESA

About the Image

NASA press release
NASA caption
Release date:11 March 1999, 06:00
Size:508 x 509 px

About the Object

Name:Gamma Ray Burst, GRB 990123
Type:• Early Universe : Cosmology : Phenomenon : Gamma Ray Burst
Distance:z=1.6 (redshift)

Image Formats

Large JPEG
163.8 KB
Screensize JPEG
279.6 KB

Colours & filters

585 nm Hubble Space Telescope

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