The Gaia spacecraft view of the whole sky: it’s measured the motion of two billion stars (ESA/Gaia/DPAC, CC BY-SA 3.0 IGO) We all know Edmond Halley because he’s immortalised by the comet that bears ...
The stars are constantly moving across the sky. Known as proper motion, this motion is imperceptible to the unaided eye but is being measured with increasing precision by Gaia. This animation shows ...
Despite my Ph.D. bona fides, at heart I still consider myself to be an amateur astronomer—someone who gazes at the night sky for the sheer joy of it, whether through a telescope’s eyepiece or a ...
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