The Inconstant Sun
If you thought the sun was an unwavering beacon, you're wrong. Its brightness varies--only by a small amount, but perhaps enough to influence Earth's climate. An experiment called SOLCON on board shuttle mission STS-107 is monitoring the sun's brightness high above Earth's cloudy atmosphere. Researchers say it's crucial data for studies of climate change. :: This NASA Science News report is submitted for your signs in the sun (Luke 21:25) files.