Winter is a great time to view the night sky, and AstroBob has a few things to look for. Right now, Jupiter is visible at dusk in the south. Venus and Mercury can be seen at dawn. In the night sky, ...
Even rarer than a twice-in-a-month full moon, is a month with no full moon. This can happen only in February. It turns out there are many ways to define a moon period, and our modern calendar month is ...
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