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Search for keywords (earth-mass) returned 18 results.

Discovered: First rocky planet outside our solar system
CoRoT-7b has a density similar to that of Mercury, Venus, Mars, and Earth.
By Provided by European Space Agency, The Netherlands
Published: 09/16/2009

A dying star gives birth to planets
Astronomers have long known that planets form in dusty disks around newborn stars. Now, researchers suspect that planets also can develop in debris disks surrounding exploded stars.
By Richard Talcott
Published: 05/26/2009

A trio of super-Earths
Astronomers have found a triple system of super-Earths around the star HD 40307.
By Provided by the ESO
Published: 06/16/2008

Small planet, small star
Astronomers have discovered an extrasolar planet only three times more massive than our own, the smallest yet observed orbiting a normal star.
By Provided by the NSF
Published: 06/02/2008

Finding earthlike worlds
New laser technology could find the first planets that resemble Earth.
By Provided by the Harvard-Smithsonian CfA
Published: 04/08/2008

When worlds collide
Have astronomers observed the aftermath of a distant planetary collision?
By Provided by Harvard-Smithsonian CfA
Published: 01/10/2008

28 new extrasolar planets found
Astronomers announce the discovery of 28 new extrasolar planets, bringing the total known to 236.
By David J. Eicher
Published: 05/30/2007

Earthlike exoplanet found
Astronomers have discovered the most earthlike planet to date.
By Provided by ESO
Published: 04/25/2007

Protoplanetary disk circles Mira B
Astronomers discover Mira B is capturing material from its dying companion star, potentially revealing a new generation of planets.
By Provided by California Institute of Technology
Published: 01/22/2007

A solar-system fairy tale
Once upon a time, two giants roughed up the neighborhood.
By Francis Reddy
Published: 12/21/2006

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