This event, known as an occultation (derived from the Latin word occultāre, which means "to conceal", can be a startling spectacle, especially if it involves a bright star. But unlike a planet ...

This is the conclusion of astronomy professor Charles Steinhardt ... falling outside the usual neat dichotomy of young, actively star-forming blue galaxies and their older, inactive red counterparts.

The Hubble Space Telescope has discovered a rare "blue lurker" star that has been feeding on material from its two conjoined siblings. The fast-spinning star provides a detailed look at the ...