Solar System
Life Beyond Earth
An ocean on Mars. An Earth-like planet light years away. The evidence is mounting, but are astronomers ready to say we're not alone?
Clues from a Comet
The first mission to collect space matter from beyond the moon offers insights into the solar system's creation
Celestial Sightseeing
From Triton's active geysers to the Sun's seething flares, newly enhanced images from U.S. and foreign space probes depict the solar system as never before
Caution, Planets Ahead
The world's largest (maybe) 9-planet solar system model goes up along Route 1 in northern Maine
Look! Up in the Sky! It's a Bird! It's a Planet. It's a Very Large Ball of Ice!
It's Pluto, with its moon, Charon
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