EarthSky reports
The first of this month’s two full moons fell on October 1, and the second one – for most of the world – falls on October 31 (Halloween). Halloween also marks 2020’s fourth and final cross-quarter day – the spookiest of the four – known in earlier times as All Hallows Eve and to us in North America as Halloween. By popular acclaim, the second of two full moons in a single calendar month is called a Blue Moon. Thus we have a Blue Moon this Halloween, but that’s not all. On this Halloween, bright red Mars – now just past its closest approach to Earth in two years – will appear in the sky near the full moon.
Read more at Blue Moon and red Mars on Halloween | Tonight | EarthSky
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