Tuesday, October 25, 2011

Three Astronomy Articles

Universe Today wrote Earth Vs. Stuff from the Sun "The Sun is big. And comparatively, Earth is a tiny Lilliputian. We’ve all seen images comparing the size of Earth to the Sun, but here are two images from October 10, 2011 that really bring home the size-scale of features on the Sun when compared to the size of Earth."

Ars Technica wrote Astronomers take first-ever image of turbulent gas between the stars "Astronomers have known for decades that turbulent motion mixes and heats the interstellar medium (ISM), the dust and gases between the stars. But until now no one had been able to actually photograph this motion. An article published yesterday in Nature by a team of astronomers not only reveals this turbulent gas, but also that it moves at a low but supersonic velocity."

io9 wrote One of the most intensively studied objects in space has been identified as an impossibly powerful neutron star "The frequency of these pulses, and the intensity of their emission, varies from pulsar to pulsar. Now, more than 40 years after its initial discovery, astrophysicists have observed a neutron star pumping out radiation at energies far greater than current astrophysical models can explain. The neutron star in question is located at the center of the Crab Nebula — the brilliant, gaseous remnant of a massive supernova so bright, residents of Earth back in 1054 are believed to have been able to see it even during the daytime."

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