A total solar eclipse that darkened much of Asia on July 22 was the 21st century's longest and gave scientists and sky-watchers an observational bonanza [...]
Merging galaxies that forcefully eject supermassive black holes have theoretically created a class of "rogue" objects—and now scientists think they know how to find them. [...]
After five successful spacewalks that have left the Hubble Space Telescope more capable than ever, astronauts on the space shuttle Atlantis hold a space-based press conference. [...]
Finding the source of a faint "shh" sound could help scientists better predict space weather, which can bombard satellites, spacecraft, and spacewalking astronauts with dangerous radiation. [...]
The same process that drives auroras on Earth is ten times more intense on tiny Mercury, where it creates invisible whirlwinds of particles, data from a NASA craft have revealed. [...]