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SpaceA comet doubleheader
Astronomers have discovered the first comet that appears to be a contact binary — two chunks somehow held together by a narrow neck of material.
By Ron Cowen -
SpaceAskew in the outer solar system
A chunk of ice orbiting backwards around the sun could offer hints about the mysterious origin of some comets.
By Ron Cowen -
SpaceSniping at Jupiter
Giant Jupiter, often thought to protect the inner planets from space debris, may sometimes acts as a sniper, hurling material toward Earth.
By Ron Cowen -