Object leaves Earth-sized impact site on Jupiter
Jupiter
was recently struck by a large object possibly a stray comet or a block
of ice which left a dent in its gaseous atmosphere the size of Earth,
NASA officials said.
The impact site was discovered by chance by an amateur astronomer in
Australia, Anthony Wesley, at about 1330 GMT Thursday, New Scientist
magazine said on its website Tuesday, quoting NASA. Wesley reported his
observations to scientists at NASA's Jet Propulsion Laboratory in
Pasadena, California, who ruled out a weather event as the cause of the
"black scar" now seen on the atmosphere surrounding the gaseous planet.
"It was completely unlike any of the weather phenomena that we
observe on Jupiter," said Glenn Orton from the California lab, who
studied the image for about six hours using an infrared telescope
located in Hawaii.
"Our first image showed a really bright object right where that black
scar was, and immediately we knew this was an impact," Orton said.
"There's no natural phenomenon that creates a black spot and bright
particles like that," he said.
It is the first time since 1994 that an impact has been observed on
the planet which is 11 times bigger than Earth and whose atmosphere is
saturated with gas.
In July 1994 21 fragments of the Shoemaker Levy 9 comet slammed into
the planet's atmosphere.
"This has all the hallmarks of an impact event, very similar to
Shoemaker-Levy 9," said NASA scientist Leigh Fletcher.
WASHINGTON, AFP
|