ScienceDaily: Galaxies News |
| The search for seeds of black holes Posted: 26 Mar 2014 02:03 PM PDT How do you grow a supermassive black hole that is a million to a billion times the mass of our sun? Astronomers do not know the answer, but a new study using data from NASA's Wide-field Infrared Survey Explorer, or WISE, has turned up what might be the cosmic seeds from which a black hole will sprout. The results are helping scientists piece together the evolution of supermassive black holes -- powerful objects that dominate the hearts of all galaxies. |
| Closest milemarker supernova in generation observed Posted: 25 Mar 2014 11:31 AM PDT Researchers have intently studied the closest type Ia supernova discovered in a generation. The proximity to Earth could yield better understanding of this particular type of supernova that astronomers use to gauge distances in the universe and learn about its expansion history. Type Ia supernovae may begin as a carbon/oxygen white dwarf star that feeds off a neighboring normal star. Once the white dwarf star accretes enough material to reach a mass that's 1.4 times the size of our sun compressed into a ball about the size of Earth, it becomes unstable and explodes into a supernova in a process that still isn't fully understood. |
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