PENNSYLVANIA, USA — You may have heard the phrase 'once in a blue moon', which refers to something rare, just like the event it's named after: two full moons in a single month. But this August, we're ...

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A blood red moon anchors a month of planetary meetups, dark-sky delights, and improved chances to catch the northern lights around the spring equinox. The Moon turns a deep copper red during the total ...

The month brings a spectacular lineup of celestial sights—including a rare chance to see Mercury without a telescope and a "micro" new moon. A super “beaver moon” rises behind Monte Prena in Italy’s ...