spacetoday.net: space news from around the webin association with SpaceNews


Astronomers observe life cycle of black hole jets
Posted: Mon, Oct 7, 2002, 7:16 AM ET (1116 GMT)
Astronomers announced last week that they have observed for the first time the full life cycle of jets of material emitted from the vicinity of a black hole. Astronomers first detected the jets from the double star system XTE J1550-564, which is thought to include a stellar-mass black hole, in 1998 using the Rossi X-ray Timing Explorer. Astronomers measured the two jets over next four years using Rossi and, later, the Chandra X-ray Observatory. By June of this year one of the jets began to fade as both jets of electrons, originally traveling near light speed, encountered interstellar gas and decelerated. The observations are useful since supermassive back holes emit similar jets, but over timescales of thousands of years. Stephane Corbel, the French scientist who led the team whose results were published in the latest issue of the journal Science, likened the observations to "watching a time-lapse movie of the rise and fall of the Bronze Age."
<<previous article   next article>>
news in brief

"Monster" planet puzzles astronomers
Posted: Sun, Nov 5 10:14 AM ET (1514 GMT)

Chairman of House Science Committee to retire
Posted: Sun, Nov 5 10:13 AM ET (1513 GMT)

news links
Friday, November 24
Instant rockets: How ISRO is developing a niche in the global space market
The Economic Times (India) — 2:47 am ET (0747 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list