单词:radiation dominated universe
单词:radiation dominated universe 相关文章
This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Five very old galaxies are now known to astrophysicists, thanks to Albert Einstein. A century ago, Einstein predicted an effect called cosmic gravitational lensing. Pictur
The first stars in our Milky Way were fearsome high-octane stars, burning their hydrogen fuel at tremendous rates, rushing through their life cycle. They like the rockslides. They live fast and die young. They run out of their fuel very quickly and e
By Deborah Block Washington, DC 05 December 2006 watch Nobel Prize Science Winners On Sunday, (December 10, 2006) this year's Nobel Prizes are being presented in Stockholm, Sweden. The annual awards are given to people who have made outstanding cont
NEW DELHI, March 16 (Xinhua) -- The Indian government has ordered food originating from(发源于) Japan to be tested for radiation in the wake of explosions at a Japanese nuclear plant following a devastating earthquake-tsunami last Friday, repo
WASHINGTON, March 30 (Xinhua) -- A trace amount of radioactive(辐射性的) iodine(碘) has been found in a sample of milk from the west state of Washington, the U.S. Environmental Protection Agency and the Food and Drug Administration (FDA) sai
本期内容: Something is happening out there, and astronomers sure wish they knew what it was. For the last several years, they have been teased and baffled by mysterious bursts of radio waves from the distant universe: pops of low-frequency radi