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New Hubble image of Mars
New Hubble Space Telescope image of Mars, in honor of the planet's May 22 opposition, when our planet Earth will sweep between the Red Planet and the sun.
May 21, 2016
New clues about ancient asteroid strike
New evidence from Australia of an enormous asteroid that struck Earth 3.4 billion years ago, triggering earthquakes and tsunamis and causing cliffs to crumble.
May 21, 2016
Blue Moon and red Mars on May 21
The moon is blue in name only, but spectacular near the red planet Mars tonight, just one day before Mars' first opposition in two years!
May 21, 2016
New Horizons, heading out, spies 1994 JR1
New Horizons imaged this distant Kuiper Belt Object twice. It has learned its location and spin, and dispelled a theory that 1994 JR1 is a quasi-satellite of Pluto.
May 20, 2016
Seagulls on an iceberg
A group of ivory gulls - a threatened species of seagull - has made a colony in an unusual place: On an iceberg.
May 20, 2016
Tonight … nearly a Blue Moon
The moon - nearly full on May 20 - will be sweeping past Mars and Saturn this weekend.
May 20, 2016
Look for M13 in Hercules
M13 is a densely packed globular cluster made of about 300,000 stars, more than 25,000 light-years from Earth. It's one of our galaxies most ancient inhabitants.
May 19, 2016
Are these non-humans conscious?
Lots of non-humans – octopuses, crows, monkeys, machines – are intelligent. Could some also be conscious?
May 18, 2016
Giant impacts typical for Earth-like worlds
An advanced computer simulation suggests that newly forming Earth-like worlds are likely to suffer a giant impact, like that thought to have created our moon.
May 18, 2016
Milky Way over the Outer Banks
Jeff Berkes captured this image earlier this month, during a night sky photography workshop.
May 18, 2016
