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01 December 2010, 06:56 AM ET
Our sun may have a companion that disturbs comets from the edge of the solar system.
08 November 2010, 10:37 AM ET
A newly discovered comet that has caught the attention of skywatchers around the world appears to be undergoing some dynamic changes.
22 October 2010, 02:42 PM ET
Will the World End in 2012?
20 July 2010, 08:11 AM ET
Some astronomers believe a hidden mini star nicknamed Nemesis is orbiting the sun, and causing a regular cycle of mass extinctions. New research purportedly rules this idea out.
11 March 2010, 08:16 AM ET
Is our Sun part of a binary star system? Some have suggested an unseen companion star, nicknamed "Nemesis," is sending comets towards Earth.
12 November 2009, 04:26 PM ET
The latest doomsday movie is entertaining and packs a lot of science.
22 October 2009, 08:44 AM ET
Will the World End in 2012?
08 May 2009, 07:48 PM ET
However, big Earth-threatening solar storms could still kick up at any time, the researchers cautioned today.
11 December 2008, 09:11 AM ET
New research says nearby stars and the galaxy influence Earth-bound comets.
18 June 2008, 10:21 AM ET
Its existence would satisfy the long-held hopes and hypothesis for a "Planet X" envisioned by scientists and sci-fi buffs alike.
19 January 2006, 01:03 PM ET
Debris disks discovered around two nearby stars look strikingly like the Kuiper Belt in the outer part of our solar system, astronomers said today.
29 July 2005, 07:59 PM ET
In a landmark discovery, a new world is found.
15 February 2005, 07:00 AM ET
Pluto was discovered 75 years ago this week, and astronomers still don't know what to make of the frigid rocky world.
01 December 2004, 03:00 PM ET
The outer reaches of our solar system may have been shaped long ago by a close encounter with another star that might even have deposited an alien world into our midst.
22 November 2004, 06:24 AM ET
A fabled tenth planet out beyond Neptune, often referred to as Planet X, hasn't been found despite years of searching. But astronomers involved in the hunt are beginning to speculate that something like Planet X will be discovered, along with Y and Z.
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