The intense gravity of a supermassive black hole can be tapped to produce immense power in the form of jets moving at millions of miles per hour. Continue reading
Share on FacebookMay 15, 2013
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Tag Archives: Galaxy
May 12, 2013
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Hubble tells a tale of galactic collisions
When we look into the distant cosmos, the great majority of the objects we see are galaxies: immense gatherings of stars, planets, gas, dust, and dark matter, showing up in all kind of shapes. A new Hubble picture registers several, but the galaxy cata… Continue reading
Share on FacebookMay 6, 2013
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NASA’s Spitzer puts planets in a petri dish
Our galaxy is teeming with a wild variety of planets. In addition to our solar system’s eight near-and-dear planets, there are more than 800 so-called exoplanets known to circle stars beyond our sun. One of the first “species” of exoplanets to be disco… Continue reading
Share on FacebookApril 23, 2013
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Galaxy goes green in burning stellar fuel
Astronomers have spotted the “greenest” of galaxies, one that converts fuel into stars with almost 100-percent efficiency. The findings come from NASA’s Wide-field Infrared Survey Explorer (WISE), NASA’s Hubble Space Telescope and the IRAM Plateau de B… Continue reading
Share on FacebookMarch 27, 2013
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Young, hot and blue: Stars in the cluster NGC 2547
The Universe is an old neighborhood — roughly 13.8 billion years old. Our galaxy, the Milky Way, is also ancient — some of its stars are more than 13 billion years old (eso0425). Nevertheless, there is still a lot of action: new objects form and othe… Continue reading
Share on FacebookMarch 12, 2013
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Astronomers discover extremely rare triple quasar
For only the second time in history, astronomers have discovered an extremely rare triple quasar system. Quasars are extremely bright and powerful sources of energy that sit in the center of a galaxy, surrounding a black hole. In systems with multiple … Continue reading
Share on FacebookMarch 7, 2013
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Astronomers find ‘lost’ supernova
Supernova explosions of massive stars are common in spiral galaxies like the Milky Way, where new stars are forming all the time. They are almost never seen in elliptical galaxies where star formation has nearly ceased. As a result, astronomers were su… Continue reading
Share on FacebookMarch 6, 2013
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Universe measured more accurately than ever before: New results pin down distance to galaxy next door
After nearly a decade of careful observations astronomers have measured the distance to our neighboring galaxy, the Large Magellanic Cloud, more accurately than ever before. This new measurement also improves our knowledge of the rate of expansion of the Universe — the Hubble Constant — and is a crucial step towards understanding the nature of the mysterious dark energy that is causing the expansion to accelerate. Continue reading
February 6, 2013
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Earth-size planets may be next door, Kepler data suggest
Using publicly available data from NASA’s Kepler space telescope, astronomers have found that six percent of red dwarf stars have habitable, Earth-sized planets. Since red dwarfs are the most common stars in our galaxy, the closest Earth-like planet co… Continue reading
Share on FacebookFebruary 5, 2013
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New ‘retention model’ explains enigmatic ribbon at edge of solar system
Since its Oct. 2008 launch, NASA’s Interstellar Boundary Explorer has provided images of the invisible interactions between our home in the galaxy and interstellar space. Particles emanating from this boundary produce a striking, narrow ribbon, which h… Continue reading
Share on FacebookJanuary 26, 2013
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Hubble finds appearances can be deceptive: Looking at the stars in NGC 411
Globular clusters are roughly spherical collections of extremely old stars, and around 150 of them are scattered around our galaxy. Hubble is one of the best telescopes for studying these, as its extremely high resolution lets astronomers see individua… Continue reading
Share on FacebookJanuary 24, 2013
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Dung beetles follow the milky way: Insects found to use stars for orientation
An insect with a tiny brain and minimal computing power has become the first animal proven to use the Milky Way for orientation. Scientists from South Africa and Sweden have published findings showing the link between dung beetles and the spray of star… Continue reading
Share on FacebookJanuary 10, 2013
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Cloudy mystery solved: A puzzling cloud near the galaxy’s center may hold clues to how stars are born
It’s the mystery of the curiously dense cloud. And astronomers are on the case. Despite being very dense, the cloud — situated near the crowded galactic center — does not form many stars. But now astronomers have discovered why. Continue reading
Share on FacebookJanuary 9, 2013
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Mapping the Milky Way: Radio telescopes give clues to structure, history
Surveys of the Milky Way are vastly increasing the number of known sites of massive star formation, tracing the structure of the Galaxy and giving clues to its history, including evidence of possible past mergers with other galaxies. Continue reading
Share on FacebookJanuary 8, 2013
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Earth-size planets common in galaxy: Perhaps 17 percent of sun-like stars have Earth-size planets within the orbit of Mercury
Last year, astronomers were excited to discover that the number of exoplanets increases towards smaller sizes, which suggests that there are many Earth-size planets in the galaxy. A new analysis of three years of Kepler data shows that this increase st… Continue reading
Share on FacebookJanuary 7, 2013
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Galaxy’s gamma-ray flares erupted far from its black hole
In 2011, a months-long blast of energy launched by an enormous black hole almost 11 billion years ago swept past Earth. Using a combination of data from NASA’s Fermi Gamma-ray Space Telescope and the National Science Foundation’s Very Long Baseline Arr… Continue reading
Share on FacebookJanuary 7, 2013
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Hubble image: The galaxy puzzle in the constellation of Centaurus
The Universe loves to fool our eyes, giving the impression that celestial objects are located at the same distance from Earth. A good example can be seen in a new spectacular image produced by the NASA/ESA Hubble Space Telescope. The galaxies NGC 5011B… Continue reading
Share on FacebookJanuary 3, 2013
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Planets abound: Astronomers estimate that at least 100 billion planets populate the galaxy
Look up at the night sky and you’ll see stars, sure. But you’re also seeing planets — billions and billions of them. At least. That’s the conclusion of a new study by astronomers that provides yet more evidence that planetary systems are the cosmic no… Continue reading
Share on FacebookJanuary 2, 2013
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Our galaxy’s ‘geysers’ are towers of power
“Monster” outflows of charged particles from the centre of our Galaxy, stretching more than halfway across the sky, have been detected and mapped. Continue reading
Share on FacebookJanuary 2, 2013
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Galactic geysers fueled by star stuff
Enormous outflows of charged particles from the center of our galaxy, stretching more than halfway across the sky and moving at supersonic speeds, have been detected and mapped with CSIRO’s 64-m Parkes radio telescope. Continue reading
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