aug 062012
 
How Accurate are the Models of Star- and Planet Formation?

  Stars form when gravitational forces coalesce the gas and dust in interstellar clouds until the material forms clumps dense enough to become stars. Precisely how this happens, however, is still very uncertain. The infall of matter is probably not symmetric, it may be inhibited by the pressure of very hot radiation around the young [continue reading]

jun 102012
 
Globular Star Clusters: The Survivors of a Massacre

  Our Milky Way galaxy is surrounded by some 200 compact groups of stars, containing up to a million stars each. At 13 billion years of age, these globular clusters are almost as old as the universe itself and were born when the first generations of stars and galaxies formed. A team of astronomers from [continue reading]

mei 032012
 
Star Being Ripped Apart By A Black Hole

  Astronomers have gathered the most direct evidence yet of a supermassive black hole shredding a star that wandered too close. Supermassive black holes, weighing millions to billions times more than the Sun, lurk in the centers of most galaxies. These hefty monsters lay quietly until an unsuspecting victim, such as a star, wanders close [continue reading]