Saturday 12 November 2016

NGC 891 vs Abell 347

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Galaxies abound in this well-chosen field of view that spans about 1 degree on the sky toward the northern constellation Andromeda. At top right is large spiral galaxy NGC 891, 100 thousand light-years across and seen almost exactly edge-on. About 30 million light-years distant, NGC 891 looks a lot like our own Milky Way with a flattened, thin, galactic disk. Its disk and central bulge are cut along the middle by dark, obscuring dust clouds. Scattered toward the lower left, and beyond a foreground of Milky Way stars, are members of galaxy cluster Abell 347. Nearly 240 million light-years away, Abell 347 shows off its own large galaxies in the sharp telescopic image. They are similar to NGC 891 in physical size but located almost 8 times farther away, so Abell 347 galaxies have roughly one eighth the apparent size of NGC 891.
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The Supermoon and Other Moons That Are Super in Their Own Ways

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To the casual observer, the coming week’s supermoon won’t look that special. Here’s a look at what causes the supermoon and other lunar phenomena.
via New York Times

Meteorites reveal lasting drought on Mars

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The lack of liquid water on the surface of Mars today has been demonstrated by new evidence in the form of meteorites on the Red Planet examined by an international team of planetary scientists.
via Science Daily
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Novel analysis technique helps solve Beagle 2 mystery

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The Mars lander Beagle 2 deployed at least three or all four of its solar panels, scientists report. The probe was discovered on the Red Planet in November 2014, but uncertainty surrounded what had caused its failure to communicate with Earth. Now researchers say that Beagle 2 did not crash, but landed and probably deployed most of its panels.
via Science Daily
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