Astronomy Central

Day and Night World Map

Where is the Sun directly overhead right now?

Twilight, Dawn, and Dusk

What are the three stages of twilight?

Perihelion and Aphelion

When is Earth nearest and farthest from the Sun?

Read more about the Sun

Moon Light World Map

Where is the Moon visible right now?

Moon Phases Visualized

What are the positions of Earth and the Moon right now?

Read more about the Moon

• Oct 14, 2023: Annular Solar Eclipse
• Apr 8, 2024: Total Solar Eclipse

Solar and Lunar Eclipses Worldwide

All eclipses and transits from 1900 to 2199.

Upcoming Live Streams

Watch LIVE coverage of our solar and lunar eclipses.

Read more about eclipses

Spring Equinox

When does spring begin?

Summer Solstice

When does summer begin?

Fall Equinox

When does fall/autumn begin?

Winter Solstice

When does winter begin?

Read more about the seasons

Meteor Showers

Calendars, animations, and tips for catching shooting stars.

Comets

What is a comet?

Asteroids

What is an asteroid?

• Quadrantids (January)
• Lyrids (April)
• Eta Aquarids (May)
• Perseids (August)
• Draconids (October)

• Orionids (October)
• Leonids (November)
• Geminids (December)
• Ursids (December)

Read more about meteors

The Sky Tonight

Find and track the Sun, Moon, planets, and stars.

Planet Distance & Brightness

Which planet is closest to Earth right now?

Planet Sizes & Order

Which are the biggest and smallest planets?

Astronomical Glossary

Know your albedo from your antumbra.

Read more about the planets