Space Calendar

Select the categories you want and subscribe in any calendar app that supports ICS feeds — Google Calendar, Apple Calendar, Outlook, and more.

Your Location

or select your hemisphere

Northern Hemisphere Southern Hemisphere

To find your latitude, search my latitude in Google, or open Google Maps, long-press your location, and read the first number.

Sky Events

Moon Phases

New moon and full moon

Meteor Showers

Peak activity nights for annual showers

Solar Eclipses

Total, annular, and partial solar eclipses worldwide

Lunar Eclipses

Total, partial, and penumbral lunar eclipses worldwide

Solstices & Equinoxes

The four astronomical seasons

Aurora Forecasts

Events when a storm is forecasted to be visible at your latitude, based on NOAA's 3-day Kp forecast. ⚠️ Calendar apps sync every few hours — aurora events 1–3 days out will appear in time, but same-day storms may not. For real-time alerts, supplement with SpaceWeatherLive.

Requires location

Planetary Events

Planetary Oppositions

Best nights to view Mars, Jupiter, Saturn, and more

Mercury & Venus Elongations

Best windows to spot inner planets

Planetary Conjunctions

Close naked-eye planet pairs (≤ 5° apart)

Planetary Alignments

Planet parades and Mars launch windows

Lunar Occultations

When the Moon passes in front of a bright planet or star

Asteroid Close Approaches

Significant Earth flybys worth tracking

Comets

Perihelion, closest approach, and naked-eye visibility windows

Launches & History

Rocket Launches

Crewed missions, maiden flights, heavy-lift vehicles, and flagship science payloads — no routine launches

Mission Milestones

Gravity assists, orbital insertions, spacecraft arrivals, and notable flybys for active missions

Space History Milestones

20, 25, 50, 75, and 100-year anniversaries of landmark moments in spaceflight

Deep Sky

Messier Marathon

The annual new-moon night in March when all 110 Messier objects can be observed in one night — best from mid-northern latitudes

Milky Way Viewing Windows

Nights when the galactic core is above the horizon during astronomical darkness with no moon — requires your location

Local Clubs

Local Astronomy Club Programs

Public observing programs and events from your local astronomy club

Don't see your club? Open an issue or submit a PR to add it.

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