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Article Images
How to find an extrasolar planet
 
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The planet passes in front of the parent star
As the planet passes in front of its parent star, the brightness of the star decreases.

Figure based on image by Hans Deeg, from ' Transits of extrasolar planets'.

Credits: Hans Deeg

 
  Radial velocity
 
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Radial velocity measurements for the star 51 Pegasi
Astronomers interpret the regularity of these measurements as indications of the presence of a planet-sized object orbiting the star.

Credits: ESA
 
  Last update: 14 May 2007 
 
More about...
Gaia overviewDarwin overviewSearching for the 'real' waterworldHow many planets are outside our Solar System?Searching for planets with lifePlanet discoverer: An interview with Didier Queloz
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Extrasolar Planets Encyclopedia
 
 
 
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