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Astronomy 15 hours ago

Assessing the habitability of planets around old red dwarfs

A new study using data from NASA's Chandra X-ray Observatory and Hubble Space Telescope gives new insight into an important question: how habitable are planets that orbit the most common type of stars in the Galaxy? The target ...

Astronomy 16 hours ago

The scariest things in the universe are black holes—and here are three reasons

Halloween is a time to be haunted by ghosts, goblins and ghouls, but nothing in the universe is scarier than a black hole.

Astronomy 16 hours ago

Most isolated massive stars are kicked out of their clusters

A pair of University of Michigan studies reveals how some massive stars—stars eight or more times the mass of our sun—become isolated in the universe: most often, their star clusters kick them out.

Astronomy Oct 29, 2020

How many habitable planets are out there?

Thanks to new research using data from the Kepler space telescope, it's estimated that there could be as many as 300 million potentially habitable planets in our galaxy. Some could even be pretty close, with several likely ...

Astronomy Oct 29, 2020

Measuring the expansion of the universe: The importance of measuring velocity

Ever since the astronomer Edwin Hubble demonstrated that the further apart two galaxies are, the faster they move away from each other, researchers have measured the expansion rate of the universe (the Hubble constant) and ...

Astronomy Oct 29, 2020

How star formation is 'quenched' in galaxies

Galaxies die quickly—that is the conclusion of a new study that examines the mechanism that switches galaxies from an active star-forming phase to one of quiescence.

Astronomy Oct 29, 2020

An early dark energy model could solve an expanding cosmological conundrum

Much mystery surrounds dark energy and the cosmological constant, the proxies used to explain the accelerating expansion of the Universe. New research suggests that an early model of dark energy presents a competing theory ...

Astronomy Oct 29, 2020

Hubble finds 'Greater Pumpkin' galaxy pair

Sorry Charlie Brown, NASA's Hubble Space Telescope is taking a peek at what might best be described as the "Greater Pumpkin," that looks like a Halloween decoration tucked away in a patch of sky cluttered with stars. What ...

Astronomy Oct 29, 2020

Where were Jupiter and Saturn born?

New work led by Carnegie's Matt Clement reveals the likely original locations of Saturn and Jupiter. These findings refine our understanding of the forces that determined our Solar System's unusual architecture, including ...

Astronomy Oct 29, 2020

An Earth-sized rogue planet discovered in the Milky Way

Our galaxy may be teeming with rogue planets, gravitationally unbound to any star. An international team of scientists, led by Polish astronomers, has announced the discovery of the smallest Earth-sized free-floating planet ...

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