Sedna is a solar system body that is one of the most distant bodies found in our solar system. The object's closest approach to the sun is far greater than Pluto's distance away from Earth — at a spot ...

The astronomers who discovered Sedna were so certain that a satellite accompanied the object that when they announced its existence, they released an artist’s rendition of the supposed moon. It ...

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 ...

Planetary scientists continue to debate what Sedna’s presence says about the history of our solar system. Now, S. Alan Stern of the Southwest Research Institute in Boulder, Colorado, says large bodies ...

In 2003, scientists discovered an object beyond Neptune that was unlike any other: Sedna. While there were larger dwarf planets beyond Neptune, and comets that would travel farther from the Sun, Sedna ...

Scientists say they have found the first example of a new breed in the solar system's menagerie: a planetoid that spends all its time far beyond Pluto, in a chilly region that was once thought to be ...

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 ...

A probe will be sent to investigate Pluto - a planet or not Astronomers are to rethink the system for classifying planets following the discovery of what some claim is the 10th in the Solar System. A ...

Astronomers have detected what could be the Solar System's 10th planet. It was first seen by astronomers using California's Palomar Observatory, and has been given the name "Sedna" after the Inuit ...

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 ...

One of Pluto's distant neighbors just got downsized: According to new observations, the remote object known as Sedna is even smaller than previously believed. When astronomers discovered Sedna in 2003 ...