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Amazing astronomical measurements

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Rigil Kent
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Three men make a tiger.

« on: August 25, 2016, 14:46:31 PM »

The planet is called Proxima b, but the lack of nomenclatural creativity is soon forgiven when considering the precision of the astrometry. Here they measure the speed at which a star, 4-something light years away, move relative to us ... to a precision of a few km/hr! It is based on such measurements (which almost certainly have to be at the limit of what can ever be detected), that the new  planet around Proxima was announced this week.  

Nice write-up here.
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« Reply #1 on: August 25, 2016, 16:41:33 PM »

The planet's got an 11 day year. It takes 11 of our days for it to orbit its star. We need something like that. Zuma's two terms would be a distant bad memory by now.
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