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One-way trip into black hole takes 200,000 years
(Reuters)
Updated: 2006-01-10 08:56
The one-way journey from the heart of a galaxy into the oblivion of a black
hole probably takes about 200,000 years, astronomers said on Monday.
The ring of stars circling the Milky Way's
central black hole is seen in this artist's concept released October 13,
2005. [Reuters] | By tracking the death spiral of
cosmic gas at the center of a galaxy called NGC1097, scientists figured that
material moving at 110,000 miles an hour would still take eons to cross into a
black hole.
Black holes are drains in space that have gravitational pull so strong that
nothing, not even light, can escape. Huge ones are believed to lurk at the
centers of many galaxies including the Milky Way, which contains the sun.
"It would take 200,000 years for gas to travel the last leg of its one-way
journey," Kambiz Fathi of Rochester Institute of Technology told reporters at a
meeting of the American Astronomical Society.
No one has ever seen a black hole, but astronomers study the way matter and
energy behave around them.
An international team led by Fathi studied the black hole at the middle of
NGC1097, a behemoth with 100 million times the mass of the sun.
The team managed to observe behavior 10 times closer to the black hole than
ever before, Fathi said, seeing clouds of material within 10 light-years of the
galactic core, where the black hole is believed to reside.
Previous research has detected gas clouds from 100 to 1,000 light-years from
the galaxy's heart.
A light-year is about 6 trillion miles, the distance light travels in a year.
The galaxy is about 47 million light-years away from Earth, relatively close in
cosmic terms.
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