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Farthest, Faintest Solar System Objects Found Beyond Neptune

distant worlds

Baltimore - Sep 08, 2003
Astronomers using NASA's Hubble Space Telescope have discovered three of the faintest and smallest objects ever detected beyond Neptune. Each object is a lump of ice and rock -- roughly the size of Philadelphia -- orbiting beyond Neptune and Pluto, where the icy bodies may have dwelled since the formation of the solar system 4.5 billion years ago. They reside in a ring-shaped region called the Kuiper Belt, which houses a swarm of icy rocks that are leftover building blocks, or "planetesimals," from the solar system's creation.

The results of the search were announced by a group led by astronomer Gary Bernstein of the University of Pennsylvania at today's meeting of the Division of Planetary Sciences in Monterey, Calif.

The study's big surprise is that so few Kuiper Belt members were discovered. With Hubble's exquisite resolution, Bernstein and his co- workers expected to find at least 60 Kuiper Belt members as small as 10 miles (15 km) in diameter -- but only three were discovered.


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Europan Ice Domes Could Be First Place To Look For Life
Boulder - Sep 03, 2003
A new University of Colorado at Boulder study of Jupiter's moon Europa may help explain the origin of the giant ice domes peppering its surface and the implications for discovering evidence of past or present life forms there.

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