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Galactic tendrils shed light on evolution of spiral galaxies
For the first time, a new survey has detected the telltale structures of spiral galaxies swallowing smaller dwarf companions in star cities more distant than our immediate galactic neighborhood, opening up the possibility of testing our current views of galaxy evolution in a new way.
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Two asteroids pass by Earth Wednesday
An asteroid designated 2010 RF12 is expected to pass within approximately 49,000 miles of Earth at 5:12 p.m. EDT. Another asteroid, 2010 RX30, passed within approximately 154,000 miles overnight. Neither is a threat to Earth.
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Astronomers say it's possible to spot volcanoes on alien worlds
An eruption sends out fumes and various gases, so volcanic activity on a rocky exoplanet might leave a telltale atmospheric signature.
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