sâmbătă, 10 aprilie 2010

NewScientist: 'Dark sun' is one of our nearest neighbours

- A dim object less than 10 light years from Earth appears to be the closest brown dwarf yet found. The "star" is so cold that any residents on an orbiting planet would see a dark sun in their starry "daytime" sky. Full story:

* NASA: Sun's Nemesis Pelted Earth with Comets, Study Suggests... Is our Sun part of a binary star system? An unseen companion star, nicknamed “Nemesis,” may be sending comets towards Earth... Astronomers Take Close-Up Pictures of Mysterious Dark Object:
* New Scientist: Is there a Planet X?:
* New Scientist: The mystery of Planet X: