Faint Red Star in NGC 6397

The image shows the faintest red dwarf star spied by Hubble in globular cluster NGC 6397 (right above the very bright star in the centre of the image). The Advanced Camera found the faintest red dwarf stars (26th magnitude), which are cooler and much lower in mass than our Sun, and the dimmest white dwarfs (28th magnitude), the burned-out relics of normal stars. The light from the dimmest white dwarfs is equal to the light produced by a birthday candle on the Moon as seen from Earth.

Credit:

NASA, ESA and H. Richer (University of British Columbia)

About the Image

NASA caption
Id:heic0608d
Type:Observation
Release date:17 August 2006, 20:00
Related releases:heic0608
Size:404 x 404 px

About the Object

Name:NGC 6397
Type:• Milky Way : Star : Grouping : Cluster : Globular
• X - Star Clusters Images/Videos
Distance:9000 light years

Colours & filters

BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
ACS
Infrared
I
814 nm Hubble Space Telescope
ACS

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