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Latest Activity: yesterday
Cosmology - Astrophysics - Astronomy
Hubble Wallpaper - Awesome Hubble Images
Started by Michel. Last reply by Michel May 15.
Started by doone. Last reply by doone Apr 19.
Started by Dallas the Phallus. Last reply by Onyango Makagutu Apr 15.
Started by Dallas the Phallus. Last reply by Dallas the Phallus Apr 14.
Started by Michel. Last reply by Onyango Makagutu Apr 9.
That is a beautiful picture doone. I saved it for later use (maybe a screensaver). The aurora coming from true north makes sense since that's where the weakest magnetic field is.
Traveling through time and space has never sounded so badass. Let's open this time vortex up
Moon, Milky Way, and ALMA TelescopeCredit: ESO/S. Guisard (www.eso.org/~sguisard)This amazing panorama depicts the site of ALMA, the Atacama Large Millimeter/submillimeter Array, in the Chilean Andes. When ALMA is complete, it will have 54 of the 12-meter-diameter dishes shown. Above the array, the arc of the Milky Way glistens while the moon bathes the scene in an eerie light. ESO Photo Ambassador Stéphane Guisard took the shot, released April 23, 2012. Click the picture to see a larger version of the astounding image.
This is spectacular!!
I've been to the north of Iceland for a few days but it was snowing heavily... no sky to speak of.
What a beautiful photo!
Explanation: It was all lined up even without the colorful aurora exploding overhead. If you follow the apex line of the recently deployed monuments of Arctic Henge in Raufarhöfn in northern Iceland from this vantage point, you will see that they point due north. A good way to tell is to follow their apex line to the line connecting the end stars of the Big Dipper, Merak and Dubhe, toward Polaris, the bright star near the north spin axis of the Earth projected onto the sky. By design, from this vantage point, this same apex line will also point directly at the midnight sun at its highest point in the sky just during the summer solstice of Earth's northern hemisphere. In other words, the Sun will not set at Arctic Henge during the summer solstice in late June, and at its highest point in the skyit will appear just above the aligned vertices of this modern monument. The above image was taken in late March during a beautiful auroral storm.
Explanation: On planet Gliese 876d, sunrises might be dangerous. Although nobody really knows what conditions are like on this close-in planet orbiting variable red dwarf star Gliese 876, the above artistic illustration gives one impression. With an orbit well inside Mercury and a mass several times that of Earth, Gliese 876d might rotate so slowly that dramatic differences exist between night and day. Gliese 876d is imagined above showing significant volcanism, possibly caused by gravitational tides flexing andinternally heating the planet, and possibly more volatile during the day. The rising red dwarf star shows expected stellar magnetic activity which includes dramatic and violent prominences. In the sky above, a hypothetical moon has its thin atmosphere blown away by the red dwarf's stellar wind. Gliese 876d excites the imagination partly because it is one of the few extrasolar planets known to be in or near to the habitable zone of its parent star.
From the Mars-size object that slammed into our planet 4.5 billion years ago, forming the moon, to a bombardment that boiled off early oceans as recently as 2.5 billion years ago, Earth has taken some massive stonings in its lifetime. Now scientists think they know where the rocks were coming from. In a paper published online today in Nature, planetary dynamicists finger the now-depleted inner edge of the asteroid belt, located just outside the orbit of Mars. Researchers had previously proposed that Jupiter and Saturn wandered toward the sun about 4 billion years ago, gravitationally slinging asteroids toward Earth as they went. But new computer simulations suggest that these planets would have also flung some innermost asteroids into inclined, but not perfectly stable, orbits. Slowly, these asteroids escaped from these orbits, pummeling Earth for billions of years to come.
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