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Milky Way Has 17B Planets the Size of Ours

And that's a conservative estimate

(Newser) - Before we start feeling too special about our home planet, scientists have a message: There are at least 17 billion planets the size of Earth in the Milky Way alone, Space.com reports. About 17% of our galaxy's stars have Earth-size exoplanets closely orbiting them—so 100 billion stars... More »

Milky Way: Home to 100B+ Planets

New study comes up with conservative estimate

(Newser) - Scientists have done a sort of "cosmic census," completing a new study that finds the Milky Way galaxy is home to 100 billion alien planets—and maybe even many more than that. "It's a staggering number, if you think about it," says the lead author.... More »

Massive Black Hole Stumps Scientists

Its mass equals 17B suns, turning previous theory on its head

(Newser) - An enormous, newly discovered black hole has scientists questioning what they thought they knew about black holes to begin with. Usually, supermassive black holes make up about 0.1% of the mass of the stars at a galaxy's center, known as a stellar bulge. But in this case, the... More »

Hubble 'Travels' Back 13.2B Years

'Time-tunnel' composite bares space 'just' after Big Bang

(Newser) - An out-of-this-world composite photo of Hubble Space Telescope shots peers back to a time a "mere" 450 million years after the Big Bang. Dubbed the eXtreme Deep Field, or XDF, the photograph—made up of 2,000 snaps taken by the Hubble over 10 years—reveals nearly 5,500... More »

Strange New Kind of Galaxy Spotted

Infrared survey uncovers 'menagerie of hidden objects'

(Newser) - After two years of scanning the night sky, NASA's WISE infrared telescope has spotted millions of supermassive black holes and a type of galaxy never seen before. The hot, dust-obscured galaxies—hot DOGs—are very rare. Each emits as much light as 100 trillion suns, hidden behind a vast... More »

Oldest Spiral Galaxy Shocks Astronomers

'Grand-design' spiral formed only 3B years after Big Bang

(Newser) - An ancient galaxy has flabbergasted astronomers. The perfectly formed spiral galaxy was born eons ago, a mere 3 billion years after the Big Bang. But this galaxy type was considered impossible so early on, when the cosmos was too chaotic to mold a "grand-design" spiral. How did it appear?... More »

Big Find: Dark Matter Strand Connecting Galaxy Clusters

Find confirms theories on universe's formation

(Newser) - This is shaping up to be one hell of a week for scientists trying to figure out the mysteries of the universe. Hot on the heels of the apparent Higgs boson discovery , an international team of astrophysicists has revealed that it has spotted a filament of dark matter connecting two... More »

Oddly Close Alien Planets Witness Huge 'Planetrise'

Kepler Space Telescope spots them 1,200 light-years away

(Newser) - Two far-flung planets are orbiting the same star so closely that they can appear to each other as giant, colorful moons, Space.com reports. Spotted by the Kepler Space Telescope, a craggy "super-Earth" and a gaseous, Neptune-size world are 1,200 light-years away, but just 1.2 million miles... More »

Japanese Team Spots 'Oldest Galaxy'

Astronomers believe galaxy is nearly 13 billion years old

(Newser) - A long time ago, in a galaxy far, far away, light was apparently emitted that has now been detected by Japanese astronomers using telescopes at the summit of Hawaii's Mauna Kea volcano. The team says the galaxy is 12.91 billion light years away and is the oldest one... More »

Milky Way Has Tens of Billions of Habitable Planets

These super-Earths are all over the galaxy, say scientists

(Newser) - Could aliens be hanging out in the Milky Way? A new discovery by astronomers shows they'd have plenty of possible homes in the galaxy, reports Reuters . The researchers found that tens of billions of planets reside in a habitable zone close to a star, allowing water to flow on... More »

Rare 'Rectangular' Galaxy Spotted

'Emerald cut' shape probably the result of two galaxies colliding

(Newser) - The vast majority of galaxies fall into one of three categories—football-shaped, irregular, or a disc with spiral arms. But LEDA 074886 is a strange one. When viewed from our planet, the dwarf galaxy has a strange, rectangular, "emerald cut" shape. Its discoverers believe the galaxy is shaped like... More »

Astronomers: Yep, Milky Way Is White

And it has a lot of planets

(Newser) - What does the Milky Way look like, from outside the Milky Way? It seems like an impossible question to answer, but astronomers found a way—and discovered in the process that the Milky Way is, as one might have guessed, white. "If you looked at new spring snow, which... More »

Dark Matter Map Unveils Cosmic Mystery

Data from Hubble telescope reaches back billions of years

(Newser) - Invisible matter may be holding us all together after all. Researchers have unveiled the biggest-ever map of dark matter in the universe, which shows large clumps and wispy filaments of the stuff nestling galaxies like jewels, the BBC and Space.com report. "We've seen the first glimpse of... More »

Astronomers Triple Universe's Star Count

'Billions of Earths' may orbit vast number of newly spotted stars

(Newser) - The known universe just got a lot more crowded. Astronomers studying distant, elliptical galaxies say they spotted many more red dwarf stars than anticipated, suggesting that the number of stars in the universe is triple earlier estimates, the Daily Mail reports. The researchers now believe there are three septillion stars... More »

Alien Planet Discovered in Milky Way

HIP 13044B and its star originated in different galaxy

(Newser) - As planets go, HIP 13044B is one hell of a survivor. Astronomers say the planet—the first one originating from another galaxy ever found in the Milky Way—is part of a solar system that once belonged to a dwarf galaxy that was cannibalized by our own. The planet has... More »

Milky Way Emits Huge Gamma Ray Bubbles

Massive bubbles of energy stump astrophysicists

(Newser) - Scientists say they have discovered two vast and mysterious bubbles of gamma-ray energy coming from the center of our galaxy. The bubbles, which extend an incredible 25,000 light years above and below the galaxy's plane, were discovered by scientists analyzing data from NASA's Fermi telescope, the Los Angeles Times... More »

Astronomers Spot Most Distant Galaxy

The stars are 13.1B light years

(Newser) - Astronomers in Chile have spotted the most distant galaxy in the universe—some 13.1 billion light years away. Its light has taken almost the whole life of the universe to get to us: The light photons detected by the astronomers started their journey when the universe was just 4%... More »

Universe's Fate: Cold, Dead Wasteland

Amount of dark energy suggests it will expand forever

(Newser) - Scientists say they've learned "exactly what the fate of the universe will be," and it doesn't sound pleasant. A team led by a NASA astronomer predicts the universe will continue to expand forever and eventually will become a cold, dead wasteland, the BBC reports. How did they arrive... More »

Space Telescope Captures Big Bang Radiation

Planck beams back microwave map of entire sky

(Newser) - The European Space Agency’s Planck space telescope has beamed back its first, much-anticipated image: a map of the entire sky, composed of microwave light. That bright line in the center of the image is our own Milky Way galaxy, and the lights surrounding it represent not stars but the... More »

Black Hole 'Hurled' From Galaxy

Object with the mass of a billion suns spotted moving at high speed

(Newser) - Astronomers believe they have spotted a supermassive black hole being flung out of its galaxy. Supermassive black holes—which have a mass roughly a billion times that of the sun—are usually found at the center of galaxies, but this one is traveling away from the core of its galaxy... More »

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