Cepheid variable star in galaxy M100

This sequence of images taken with the Hubble Space Telescope chronicles the rhythmic changes in a rare class of variable star (located in the center of each image) in the spiral galaxy M100. This class of pulsating star is called a Cepheid Variable. The Cepheid in this Hubble picture doubles in brightness (24.5 to 25.3 apparent magnitude) over a period of 51.3 days.


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

About the Image

NASA press release
NASA caption
Release date:26 October 1994, 19:00
Size:800 x 600 px

About the Object

Name:Messier 100
Type:Local Universe : Star : Type : Variable
Local Universe : Galaxy : Type : Spiral
Distance:50 million light years

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165.3 KB
Screensize JPEG
210.2 KB

Colours & filters

Optical Hubble Space Telescope

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