Science ❯ Astronomy

Celestial Navigation

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Tonight the Moon Will Hide Regulus Across Parts of the Americas

The precise alignment offers a rare naked‑eye lesson in the Moon’s motion.

Comet Pan‑STARRS Reaches Perihelion Sunday, Closing a Brief Pre‑Dawn Viewing Window

SR-71 Retrospectives Revisit the Blackbird’s True Speed Limits

Rare Comet Pan‑STARRS Now Glows Before Dawn for a Short Northern Viewing Window

Crescent Moon Pairs With Venus on the Vernal Equinox

Crescent Moon Brushes Past Saturn Tonight, With Neptune Nearby

Orionid Meteor Shower Peaks Oct. 21–23 Under New-Moon Skies

Twin Green Comets Enter Prime Viewing Week Before Closest Approaches

Bogong Moths Navigate 1,000-Kilometer Spring Migration by Starlight