Today's date: 21 November 2009
This Week: Death of the mastadon
In the News: Antarctic ozone hole: 10th largest on record!
Coming Thursday: Return of the wild: Coyotes, bears and turkeys are back!
Archive for the ‘Physical Science’ Category
Star-Burst Fills Empty Hole - Thursday, June 15th, 2006
Where did all the dust come from? If you are interested in the origin of planets and human beings, here’s evidence that a star explosion made mucho dust.
Time to Reconsider the Leap Second - Thursday, September 29th, 2005
The solar clock doesn’t quite line up with the atomic clock. We use leap seconds to make them match. Should we dump the leap second?
Time for Time: What’s an Atomic Clock? - Thursday, August 25th, 2005
How does an atomic clock work? How does an atomic fountain work? Is there a limit to the accuracy of an atomic clock?
Space Astronomy’s Coolest Pix - Thursday, May 5th, 2005
In astronomy, it helps to get above it all. Three cool orbiting telescopes are collecting visible, infrared and X-ray light. We ogle their greatest hits.
Planet-making: What Happens First? - Thursday, March 17th, 2005
Before planets, there was dust. But gravity doesn’t affect dust. So how did the planets form before solar wind blew all the dust away? Experiment shows that dust in planetary nebulas was coated with sticky ice.
Neutrinos: Seeing the Invisible Particle - Thursday, February 10th, 2005
Neutrinos are everywhere, but catching these tiny particles is one of the toughest tasks in physics. A giant neutrino experiment is starting up in Illinois. Want to go visit?
Saturn’s Secret: Lightning - Wednesday, December 22nd, 2004
Cassini finds lightning strikes on Saturn, haze on moon Titan, dust between the rings, and new rotation rate.
Planet Formation - Wednesday, November 24th, 2004
New view of crystals that form into planets in protoplanetary disks. Which came first, the planet or the crystals?
Cool Science Images
Virtual Science!
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