CALIFORNIA | LOCAL
July 13, 2000
Most pulsars--spinning, super-dense neutron stars that emit powerful beams of radio waves and light--are much older than researchers previously believed, a discovery that challenges the standard theory about how pulsar signals are produced. Astronomers from MIT and the National Radio Astronomy Observatory have tracked a pulsar thought to be 16,000 years old since 1993.
CALIFORNIA | LOCAL
July 23, 1998
MIT scientists believe they are observing the birth of a millisecond radar pulsar more than 12,000 miles away in the constellation Sagittarius. The star, spotted by NASA's Rossi X-Ray Timing Explorer satellite during a monthlong burst of X-rays that began in April, could be a "missing link" in the evolution of stars, they report today in Nature.
July 3, 2003 |
Gravitational radiation -- the ripples in the fabric of space-time predicted in Einstein's General Theory of Relativity -- may be what saves the universe's fastest-rotating stars from spinning to death. Scientists said Wednesday at a NASA news conference that pulsars -- rapidly spinning stars that emit pulses of electromagnetic radiation like rotating lighthouse beacons -- have a speed limit of about 760 rotations per second.
January 17, 1991 |
In what has turned into a marathon lesson in humility, astronomers have discovered that something is terribly wrong with their understanding of pulsars, those mysterious radio beacons that were born during some of the universe's most violent moments. Until recently, astronomers thought they knew where to look for pulsars, which are remnants of exploding stars.
July 25, 1991 |
Scientists have discovered a distant planet where virtually no one would have expected it to be, orbiting a pulsar star that was born during one of the most violent events the universe has to offer, according to research published today. If confirmed, this would be the first planet discovered beyond our solar system.
July 26, 2012 |
Like celebrities who never travel without a companion, the brightest stars in the universe generally have their own companion: a second star that orbits close by. At least three-quarters of these extremely bright, exceptionally hot stars have such companions, according to the first survey of so-called O-type stars. An estimated 20% to 30% of the binary pairs will eventually merge, astronomers reported Thursday in the journal Science, and as many as another 50% of the O-type stars will have much of their hydrogen stripped away by their companions, which are commonly called vampire stars.