The sun may have captured thousands or even millions of asteroids from another planetary system during an encounter more than 4 billion years ago, astronomers report today. Such an interstellar ballet ...

When the distant planetoid Sedna was discovered on the outer edges of our solar system, it posed a puzzle to scientists. Sedna appeared to be spinning very slowly compared to most solar system objects ...

Astronomers studying 35 NASA Hubble Space Telescope (HST) images of the solar system's farthest known object, unofficially named Sedna, are surprised the object does not appear to have a companion ...

New Hubble images of the most distant object ever spotted in the Solar System are perplexing astronomers. They show that the planetoid Sedna does not seem to have a moon as they expected. “I’m ...

The distant planetoid Sedna appears to be covered in a tar-like sludge that gives it a distinctly red hue, a new study reveals. The findings suggests the dark crust was baked-on by the Sun and has ...

Space is infinite and so are its wonders, as shown by the announcement of the discovery of icy-cold Sedna, a planetoid three times farther away from the sun than even lonesome Pluto. Sedna, named for ...