A new model for generating a global magnetic field in the ancient moon could help solve a 40-year-old mystery. The Earth has a magnetic field because it has a spinning solid core surrounded by hot metallic liquid, which churns around lava-lamp style and generates magnetism. But the moon is too small and cool to possess such a molten interior and therefore lacks a global magnetic field.
If you don’t succeed the first 18 times, try, try again. That might be the motto of the Russian space agency Roscosmos, which is preparing to launch its first new probe to Mars after a long string of failures and a 15-year hiatus on planetary science exploration.
NASA wants you and your smartphone to help it address global problems. On Sept. 20, the agency announced the International Space Apps Competition asking scientists, engineers, and ordinary citizens to develop apps that use publicly released scientific data to study things like weather-related hazards and other pressing issues.
Source: news.harvard.edu — Saturday, September 17, 2011Harvard Museum of Natural History 26 Oxford St. Cambridge, MA 02138 Wed., Oct. 12, 2011, 9 a.m. – 5 p.m. The National Park Service and the American Geological Institute are partnering to ho…