planetesimals

“Marstinis” Could Help Explain Why the Red Planet is So Small

by Nancy Atkinson February 2, 2011

Want to stay on top of all the space news? Follow @universetoday on Twitter Mars is a small planet. In fact, for scientists who do solar system modeling, the planet is too small. “This is an outstanding problem in terrestrial planet formation,” said Dr. David Minton from the Southwest Research Institute. “Everyone who does simulations […]

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Protoplanets

by Abby Cessna August 9, 2009

Protoplanets are small celestial objects that are the size of a moon or a bit bigger. They are small planets, like an even smaller version of a dwarf planet. Astronomers believe that these objects form during the creation of a solar system. The most popular theory of how a solar system is formed says that […]

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Planetesimals

by Abby Cessna July 26, 2009

A planetesimal is an object formed from dust, rock, and other materials. The word has its roots in the concept infinitesimal, which indicates an object too small to see or measure. Planetesimals can be anywhere in size from several meters to hundreds of kilometers. The term refers to small celestial bodies formed during the creation […]

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