Wednesday, January 15, 2014

astro video for the day/ more Mars flyby videos!

There's a previous mars flyby video posted on Monday, Jan 13, 2014, 4:17 P.M. on my blog.

- Science extra,

BOSS measures the universe to one percent accuracy

Or, at least, BOSS measures the distances to galaxies six billion lights years out to one percent accuracy. “Twenty years ago astronomers were arguing about estimates that differed by up to fifty percent. Five years ago, we’d refined that uncertainty to five percent; a year ago it was two percent. One-percent accuracy will be the standard for a long time to come.”  . . . the Inflationary generalization of the Big Bang universe theory predicts the universe is extremely flat; the BOSS measurements supports this to a high degree.

Astronomer's have plans to go far beyond BOSS; "The proposed Dark Energy Spectroscopic Instrument (DESI), based on an international partnership of nearly 50 institutions led by Berkeley Lab, would enable the Mayall Telescope on Kitt Peak in Arizona to map over 20 million galaxies, plus over three million quasars, in 14,000 square degrees of the northern sky. By filling in the missing eons that BOSS can’t reach, DESI could sharpen and extend coverage of the expansion history of the universe from the first appearance of the cosmic background radiation to the present day."

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