Which Planets Can You See Tonight?

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Search for a city's night sky:

Find out when planets are visible and much more...

After a Recent Acceleration, Earth’s Spin May Be Slowing Again

In 2023, for the first time in seven years, the average ‘length of day’ became longer. Latest predictions suggest this slowdown may continue into 2025. Read the full story.

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Planet Sizes and Order

How large are the planets and what is their order from the Sun?

Distance, Brightness, and Apparent Size of Planets

See how far the planets are from the Sun or Earth, how bright they look, and their apparent size in the sky.

Illustration showing the Moon orbiting Earth in Space.

Moon Phase Chart

Moon phases visualized in real time, the past, or the future.

Meteor Showers

Dates and tips on how and where to see "shooting stars" from meteor showers all over the world.

An image of the solar system showing the alignment of the Earth, Jupiter, and Saturn for the Great Conjunction of 2020.

What Is a Conjunction?

A conjunction is when planets like Mars, Jupiter, or Saturn, or other bodies like stars or the Moon, meet in the sky. Why and when do conjunctions happen?

What Are Comets?

Comets are small celestial bodies that orbit the Sun. Primarily made of dust and ice, many have a tail (coma) and are thought to be remnants of the formation of the Solar System.