The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation). Astronomy also intersects with biology, as astrobiology, studying potential life throughout the universe.

Nature of astronomy

Astronomy can be described as all the following:

Branches

History

History of astronomy

Basic astronomical phenomena

Astronomical objects

Astronomical object

Solar System

Sun

Sun

Planets

Small Solar System bodies

Small Solar System body

Exoplanets

Stars and stellar objects

Stars

Variable stars

Variable star

Supernovae

Supernova

Black holes

Black hole

Constellations

The 88 modern constellations

Constellation history

The 48 constellations listed by Ptolemy after 150 AD

The 41 additional constellations added in the 16th and 17th centuries

Obsolete constellations including Ptolemy's Argo Navis

Obsolete constellations including Ptolemy's Argo Navis Anser

Clusters and nebulae

Galaxies

Cosmology

Space exploration

Organizations

Public sector space agencies

Space agencies

Africa

North Africa

Sub-Saharan

North America

South America

Asia

East Asia

Southeast Asia

South Asia

Southwest Asia

Central Asia

Europe

Oceania

World

Preceded by the Soviet space program

Books and publications

Astronomers