Cepheid Variable Star in Galaxy M100

This NASA/ESA Hubble Space Telescope image of a region of the galaxy M100 shows a class of pulsating star called a Cepheid Variable. Though rare, these stars are reliable distance indicators to galaxies. Based on the Hubble observation, the distance to M100 has been measured accurately as 56 million light-years (+/- 6 million light-years), making it the farthest object where intergalactic distances have been determined precisely.

Credit:

Dr. Wendy L. Freedman, Observatories of the Carnegie Institution of Washington, and NASA/ESA

About the Image

NASA press release
Id:opo9449d
Type:Observation
Release date:26 October 1994, 19:00
Size:1524 x 1087 px

About the Object

Name:Messier 100
Type:Local Universe : Star : Type : Variable
Local Universe : Galaxy : Type : Spiral
Distance:50 million light years
Constellation:Coma Berenices
Category:Galaxies
Stars

Image Formats

Large JPEG
495.2 KB
Screensize JPEG
227.4 KB

Wallpapers

1024x768
266.6 KB
1280x1024
422.2 KB
1600x1200
571.1 KB
1920x1200
413.2 KB
2048x1536
537.4 KB

Coordinates

Position (RA):12 23 0.55
Position (Dec):15° 49' 22.16"
Field of view:2.52 x 1.80 arcminutes
Orientation:North is 164.7° right of vertical

Colours & filters

BandTelescope
Optical Hubble Space Telescope
WFPC2

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