North Star Is Rapidly Changing
June 2, 2004
The North Star (Polaris) has brightened by 150% since Ptolemy observed it 2000 years ago, says the American Astronomical Society (see report on Science Now). If the differences from those in ancient times are real, “these changes are 100 times larger than predicted by current theories of stellar evolution.” Polaris is also a pulsating Cepheid […]
