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Nice interview of astrophysicist Saul Perlmutter on his work in the 1990s revealing how the universe's expansion rate is accelerating.

If he were still alive, Fr. Georges Lemaitre would have been thrilled at this discovery.
(Not that he would have stuck his tongue out at Einstein or Fred Hoyle or anything...)

Labels: astronomy, science

posted by John Farrell at 1:07 PM

 
Extra solar watery world:

The planet, named GJ 1214b, is 2.7 times as large as Earth and orbits a star much smaller and less luminous than our sun. That's significant, Charbonneau said, because for many years, astronomers assumed that planets only would be found orbiting stars that are similar in size to the sun.
Because of that assumption, researchers didn't spend much time looking for planets circling small stars, he said. The discovery of this "watery world" helps debunk the notion that Earth-like planets could form only in conditions similar to those in our solar system.
"Nature is just far more inventive in making planets than we were imagining," he said.
In a way, the newly discovered planet was sitting right in front of astronomers' faces, just waiting for them to look. Instead of using high-powered telescopes attached to satellites, they spotted the planet using an amateur-sized, 16-inch telescope on the ground.

Labels: astronomy, science

posted by John Farrell at 10:30 AM