A Supercomputer On the Moon To Direct Deep Space Traffic

I think Chang’s idea is a very good one. Saw this on Slashdot

“Ouliang Chang floated his lunar supercomputer idea a few weeks ago at a space conference in Pasadena, California. The plan is to bury a massive machine in a deep dark crater, on the side of the moon that’s facing away from Earth and all of its electromagnetic chatter. Nuclear-powered, it would process data for space missions and slingshot Earth’s Deep Space Network into a brand new moon-centric era.”

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Thierry Legault: Moonbow and Meteor over Australia’s Wallaman Falls

Astrophotographer extraordinaire Thierry Legault traveled to Australia for the Transit of Venus this past June, but he didn’t stop with just taking incredible images of the Transit and then head home to France. He’s just published an wonderful collection of night sky images he took from his time in Australia, including this beautifully stunning image of a ‘Moonbow’ over Wallaman Falls…”

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Source: Universe Today

A systematic search for massive black hole binaries in SDSS spectroscopic sample. (arXiv:1106.1180v1 [astro-ph.CO])

The movie shows a merger of two galaxies (simulation) that forms a single galaxy with two centrally located supermassive black holes surrounded by disks of hot gas. The black holes orbit each other for hundreds of millions of years before they merge to form a single supermassive black hole that sends out intense gravitational waves. (Animation: NASA/CXC/A. Hobart Simulation: Josh Barnes (U. of Hawaii)/John Hibbard (NRAO)

I like just about anything that has to do with Black holes, but to find an article about binaries black holes… well hot diggitty dog. The image/movie does not represent the contents of the article, but is included ’cause I think it is cool and it shows a merging binary system. Below is a synopsis of the article provided by the authors.

We present the results of a systematic search for massive black hole binaries in the Sloan Digital Sky Survey spectroscopic database. We focus on bound binaries, under the assumption that one of the black holes is active. In this framework, the broad lines associated to the accreting black hole are expected to show systematic velocity shifts with respect to the narrow lines, which trace the rest-frame of the galaxy. For a sample of 54586 quasars and 3929 galaxies at redshifts 0.1

To download a PDF of the full article follow the link here.