Outer Space

The planet has lost much of its former amounts of water and even today, hydrogen continues to escape into space.  (Image: via   pixabay  /  CC0 1.0)

New Water Cycle on Mars Discovered

Approximately every two Earth years, when it is summer on the southern hemisphere of Mars, a window opens: Only there and only in this season can water vapor efficiently rise from the lower into the upper atmosphere. There, winds carry…

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Ghosts of Ancient Explosions Live on in Stars Today

When small, dense stars called white dwarfs explode, they produce bright, short-lived flares called Type Ia supernovae. These supernovae are informative cosmological markers for astronomers — for example, they were…

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New Water Cycle on Mars Discovered

Approximately every two Earth years, when it is summer on the southern hemisphere of Mars, a window opens: Only there and only in this season can water vapor efficiently rise…

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Hubble’s Dazzling Display of 2 Colliding Galaxies

Located in the constellation of Hercules, about 230 million light-years away, NGC 6052 is a pair of colliding galaxies. They were first discovered in 1784 by William Herschel and were originally classified as…

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What Exactly Is a Black Hole?

What is a black hole? In an article that has just appeared in the journal Nature Astronomy, LMU philosopher Erik Curiel shows that physicists use different definitions of the concept,…

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X-ray Pulse Detected Near Event Horizon

On Nov. 22, 2014, astronomers spotted a rare event in the night sky: A supermassive black hole at the center of a galaxy, nearly 300 million light-years from Earth, ripping…

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Citizen Scientists Find New World With NASA Telescope

Using data from NASA’s Kepler space telescope, citizen scientists have discovered a planet roughly twice the size of Earth located within its star’s habitable zone, the range of orbital distances where…

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Gaia Spots a ‘Ghost’ Galaxy

An international team of astronomers, including from the University of Cambridge, discovered the massive object when trawling through data from the European Space Agency’s Gaia satellite. The object, named Antlia…