DMB
05 Apr 2009, 07:50 AM
http://edition.cnn.com/2009/TECH/space/04/02/jupiter.red.spot.shrinking/index.html
The spot, which is actually an ancient monster storm that measures about three Earths across, lost 15 percent of its diameter between 1996 and 2006, scientists at the University of California, Berkeley, have found.
It shrank by about 1 kilometer (about 0.6 miles) a day during that time period, said Xylar Asay-Davis, a postdoctoral researcher who was part of the study.
...Astronomers have been tracking it since the 1870s, said Glenn Orton, a senior research scientist at NASA'S Jet Propulsion Laboratory who investigates planetary atmospheres. It is possible that the spot may one day disappear, he added.
"It's just a storm that, like many things, has a natural growth and disintegration rate," Orton said.
Astronomers see a dramatic difference in the spot's shape when comparing photos of Jupiter taken more than a century ago to recent images of the planet. Orton joked that the Great Red Spot used to be so long that its acronym should have stood for the "Great Red Sausage."
"I just happened to look at an old picture and said to myself, 'That looks like a breakfast sausage.' It's very long. I mean, if you look at one of those pictures back from then and a picture now, you think, 'My God, this thing is going on a diet," Orton said.
This thing has been observed for centuries. I had always assumed it must have some sort of stability.
The spot, which is actually an ancient monster storm that measures about three Earths across, lost 15 percent of its diameter between 1996 and 2006, scientists at the University of California, Berkeley, have found.
It shrank by about 1 kilometer (about 0.6 miles) a day during that time period, said Xylar Asay-Davis, a postdoctoral researcher who was part of the study.
...Astronomers have been tracking it since the 1870s, said Glenn Orton, a senior research scientist at NASA'S Jet Propulsion Laboratory who investigates planetary atmospheres. It is possible that the spot may one day disappear, he added.
"It's just a storm that, like many things, has a natural growth and disintegration rate," Orton said.
Astronomers see a dramatic difference in the spot's shape when comparing photos of Jupiter taken more than a century ago to recent images of the planet. Orton joked that the Great Red Spot used to be so long that its acronym should have stood for the "Great Red Sausage."
"I just happened to look at an old picture and said to myself, 'That looks like a breakfast sausage.' It's very long. I mean, if you look at one of those pictures back from then and a picture now, you think, 'My God, this thing is going on a diet," Orton said.
This thing has been observed for centuries. I had always assumed it must have some sort of stability.