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AstronomyNew sky map: Look, Ma, no Milky Way!
Using a radio telescope to record emissions from hydrogen gas, astronomers have penetrated the murk of the Milky Way to map the entire southern sky.
By Ron Cowen -
EarthBursting in Air: Satellites tally small asteroid hits
On average, a small asteroid slams into Earth's atmosphere and explodes with the energy of 1,000 Hiroshima-size blasts once every thousand years or so, a rate that is less than one-third as high as scientists previously supposed.
By Sid Perkins -
Planetary ScienceLeapin’ Lava! Volcanic eruption on Io breaks the record
Pointing a ground-based telescope at Jupiter's moon Io, astronomers have recorded the most powerful volcano ever observed in the solar system.