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Astronomy

Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation).

Moon

Solar System

Planets

Constellations

Messier List

View the ISS

Nebulae

Open Clusters

Globular Clusters

Galaxies

Asteroids

Comets

Double Stars

The Sun

Orbits

Coordinates

Spectrum

Telescopes

Calculators