Hubble probes ‘ghost’ galaxy

Astronomers used the NASA/ESA Hubble Space Telescope to unmask the dim, star-starved dwarf galaxy Leo IV. This Hubble image demonstrates why astronomers had a tough time spotting this small-fry galaxy: it is practically invisible. The image shows how the handful of stars from the sparse galaxy are virtually indistinguishable from the background.

Residing 500 000 light-years from Earth, Leo IV is one of more than a dozen ultra-faint dwarf galaxies found lurking around our Milky Way galaxy. These galaxies are dominated by dark matter, an invisible substance that makes up the bulk of the Universe’s mass.

Credit:

NASA, ESA, and T. Brown (STScI)

About the Image

Id:heic1211a
Type:Observation
Release date:10 July 2012, 19:00
Related releases:heic1211
Size:6515 x 6615 px

About the Object

Name:Leo IV dwarf galaxy
Type:• Local Universe : Galaxy : Size : Dwarf
• X - Galaxies Images/Videos
Distance:500000 light years

Colours & filters

BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
ACS
Optical
i
814 nm Hubble Space Telescope
ACS

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