When something’s going to hit — or just put on a show — you’ll know first.

Real-time alerts for asteroid close approaches, fireballs, meteor showers and aurora.

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Close approach

Train car-sized asteroid 2026 TV8 to pass by in 3 days

October 21, 2026

Meteor shower

Orionids peak Wednesday — here's how to watch

Peaks October 21 · up to ~20 meteors/hour in dark skies

October 21, 2026

Mission update

Hera: Final approach to Didymos begins

ESA · Didymos & Dimorphos · expected ~October 20

October 20, 2026

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What’s passing, what’s visible, what hit.

Want the raw numbers? Every close approach and tracked threat, straight from the Minor Planet Center and NASA Sentry: live data & tables →