Jan
02
2008

White Dwarf Pulses Like a Pulsar

New observations from Suzaku, a joint Japanese Aerospace Exploration Agency (JAXA) and NASA X-ray observatory, have challenged scientists’ conventional understanding of white dwarfs. Observers had believed white dwarfs were inert stellar corpses that slowly cool and fade away, but the new data tell a completely different story. At least one white dwarf, known as AE… Continue reading »

Oct
09
2007

Major Step Toward Knowing Origin of Cosmic Rays

Recent observations from NASA and Japanese X-ray observatories have helped clarify one of the long-standing mysteries in astronomy – the origin of cosmic rays. Outer space is a vast shooting gallery of cosmic rays. Discovered in 1912, cosmic rays are not actually rays at all; they are subatomic particles and ions (such as protons and… Continue reading »