Astronomers have long known that powerful cosmic winds can sometimes blow through galaxies, sweeping out interstellar material and stopping future star formation. Now they have a clearer snapshot of how it happens.
When two different sized galaxies smash together, the larger galaxy stops the smaller one making new stars, according to a study of more than 20,000 merging galaxies.
NASA's New Horizons spacecraft reached its closest approach to Pluto on Tuesday, swooping to within 7,800 miles of the dwarf planet out beyond Neptune, snapping pictures and gathering data.
The Stratosphere Observatory for Infrared Astronomy (SOFIA) is a modified Boeing 747SP aircraft that makes celestial observations with its German-built 100-inch telescope. The telescope is enhanced to collect infrared radiation, ...