Black-hole system GRO J1655-40 in Scorpius

NASA/ESA Hubble Space Telescope image shows the Year 2001 observation of the black hole system GRO J1655-40 in the constellation of Scorpius. Hubble's high resolution has allowed astronomers to measure the motion of this black-hole system across the sky using this image and an image taken in 1996. Scientists combined the Hubble data with those obtained from ground-based telescopes and found that the black hole is moving through space with a velocity of 400 000 kilometres per hour. This has provided possibly the best evidence yet that stellar-mass black holes are made in supernova explosions. The 720-second exposure was taken through a red filter.


European Space Agency, NASA and Felix Mirabel (the French Atomic Energy Commission & the Institute for Astronomy and Space Physics/Conicet of Argentina)

About the Image

Release date:18 November 2002, 15:00
Related releases:heic0211
Size:1192 x 1013 px

About the Object

Name:GRO J1655-40
Type:Milky Way : Star : Evolutionary Stage : Black Hole
Milky Way : Star : Grouping : Binary
Distance:5500 light years
Category:Quasars and Black Holes

Image Formats

r.titleLarge JPEG
54.4 KB
r.titleScreensize JPEG
35.9 KB

Colours & filters

Hubble Space Telescope

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