Why it’s cool to wait for Betelgeuse to blow…

On clear nights I make a point of looking for Betelgeuse – Alpha Orionis, an M2Iab class red supergiant. It’s the bright red star in Orion, below the belt from the New Zealand perspective. It’s naked-eye bright – magnitude 0.42, which is duller than it was in the 1930s but still one of the top eight brightest … More Why it’s cool to wait for Betelgeuse to blow…