✦ Today's cosmos

Perseids from Perseus

NASA Astronomy Picture of the Day · August 18, 2026
Perseids from Perseus
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Image credit & copyright: Jakub Kuřák · via NASA APOD
◆ What you're looking at
This was a good year for the Perseids meteor shower. A key reason was the Moon was absent from lighting up Earth's night sky so that more meteors were visible than usual. Where was the Moon? It was busy visiting the Sun. Near the Perseids peak, the Moon moved directly in front of the Sun and created a total solar eclipse visible from Greenland and Spain. The Perseids occur when the Earth collides with a stream of Sun-orbiting debris cast off by Comet Swift-Tuttle. Perseid meteors, although typically only the size of a sand grain, tend to be fast and bright because Swift-Tuttle's debris orbits the Sun in a direction partly opposite Earth's orbital motion. In the featured image compilation, accumulated over several nights from Jizerka in the Czech Republic, the Perseids meteor streaks can be traced back to a single location on the sky -- its radiant in Perseus. Gallery: Perseids Meteor Shower of 2026
◆ Over the High Country tonight
🌓 First Quarter · 32% lit. Half-lit moon: planets and bright constellations show well, the dimmest stuff hides. Sky's truly dark after 9:46 PM. From a dark spot the Milky Way arcs overhead, and the Summer Triangle (Vega, Deneb, Altair) climbs the east. Give your eyes about 20 minutes away from the fire to adjust, then look up.