Betelgeuse remains dim. The red supergiant Betelgeuse in Orion's shoulder has always been slightly variable, but for the last month or so it's been in an unusually low dip. As of January 22nd it was still about visual magnitude +1.5 instead of its more typical +0.5, It's clearly fainter than similarly-colored Aldebaran, magnitude +0.9, with […]
The ancient pole star known as Thuban turns out to be an eclipsing binary. If you're up for a challenge, you can see the eclipses for yourself. The post See Ancient “North Stars” Eclipse Each Other appeared first on Sky & Telescope.
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