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Posts by EarthSky

mars-MAVEN-cp
Science Wire | Sep 22, 2014

Success! MAVEN spacecraft enters Mars orbit

NASA’s MAVEN spacecraft – first spacecraft dedicated to exploring Mars’ upper atmosphere – successfully entered orbit on September 21, 2014 at 10:24 p.m. EDT.

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Science Wire | Sep 19, 2014

Supermassive black hole in a galaxy only 300 light-years wide

It’s an unlikely object in an improbable place — a monster black hole lurking inside one of the tiniest galaxies ever known.

Image via Flickr user Kelly DeLay
Science Wire | Sep 17, 2014

Tornado Alley storm season starting and ending earlier

Peak tornado activity typically occurs in the region from early May to early July. It has moved an average of seven days earlier over the past six decades.

Image credit: Davide Bonadonna
Science Wire | Sep 15, 2014

Bigger than T. rex, this dinosaur hunted in water

Spinosaurus was the largest known predatory dinosaur to roam the Earth. Scientists now say that it was also the first truly semiaquatic dinosaur.

Image credit: University of Birmingham
Science Wire | Sep 12, 2014

New scans reveal hidden monuments of Stonehenge

The startling results of a new survey include 17 previously unknown monuments and dozens of burial mounds surrounding Stonehenge.

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Tonight | Sep 12, 2014

Look for Cassiopeia the Queen in northeast after sunset now

Cassiopeia the Queen has the distinct shape of a W, or M.

Ozone hole over Antarctica at the peak of this year's season of ozone depletion, October, 2013.  Image via NASA/Ozone Hole Watch.
Science Wire | Sep 08, 2014

What’s the source of a mysterious ozone-depleting chemical?

The Montreal Protocol put the brakes on ozone-depleting chemicals 30 years ago. But one compound is still abundant in Earth’s atmosphere. Where’s it coming from?

Artist's concept via NASA
Science Wire | Sep 07, 2014

Small asteroid to sweep safely past Earth Sunday

Asteroid passes near Earth on September 7. At its closest (18:18 UTC / 2:18 p.m. EDT), it’s about the same distance from Earth as weather and communications satellites.

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Science Wire | Sep 03, 2014

Astronomers define boundaries of our home supercluster and name it Laniakea

Our supercluster is 500 million light-years in diameter and contains the mass of a hundred million billion suns. Its new name is Hawaiian for “immense heaven.”

Photo credit: Anthony Quintano/Flickr
Science Wire | Sep 02, 2014

U.S. Southwest may face mega-drought this century

With ongoing climate change, the long view of future drought risk in the U.S. Southwest is not a pretty picture, say scientists.