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universe
Table of Contents
References & Edit History Related Topics
Images & Videos
Examine the observable universe's place within the whole universe
The scale of the universe: Earth's solar system and beyond
How did Ptolemy explain retrograde motion?
Eratosthenes' method of measuring Earth's circumference
Aristotle's theory of the solar system explained
Copernicus's revolutionary theory: The Sun as the center
Galileo's telescopes photosphere of the Sun
Kepler's revolutionary laws of planetary motion
Halley's Comet
For Students
universe summary
Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
Ursa major constellation illustration art. (Big Dipper) stars, space, night sky)
Stars: Explosions in Space
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Related Questions
Read Next
Solar system illustration. (Sun; planets)
A Model of the Cosmos
Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003
9 Britannica Articles That Explain the Meaning of Life
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
Large Magellanic Cloud (LMC) new star formation. Satellite galaxy of the Milky Way. This galaxy is scattered with glowing nebulae, the most noticeable sign that new stars are being born.
Was the Big Bang Actually an Explosion?
Discover
Submerged sperm whale off east Sri Lanka coast, mammal
How Did the Sperm Whale Get Its Name?
Statue of Nostradamus
Nostradamus and His Prophecies
Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)
All 119 References in “We Didn’t Start the Fire,” Explained
NBA Lakers Celtics Finals Kevin Garnett shooting.
10 Great Sports Rivalries
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.
7 Deadliest Weapons in History
Chinese pictograph, calligraphy tablet of Huang Tingjian, a famous calligrapher in Ancient Song Dynasty. The background of Chinese cultural elements.
The World’s 5 Most Commonly Used Writing Systems

universe: Related Content

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News •

Largest Structure in The Universe May Be 50% Larger Than We Thought • Apr. 26, 2025, 4:18 AM ET (ScienceAlert)

Photos and Videos

Eratosthenes' method of measuring Earth's circumference
Galileo's telescopes
photosphere of the Sun
Halley's Comet
Stellar parallax
globular cluster M80
galaxy
Pinwheel Galaxy (M101)
Andromeda Galaxy
galaxy types
Examine the observable universe's place within the whole universe
The scale of the universe: Earth's solar system and beyond
How did Ptolemy explain retrograde motion?
Aristotle's theory of the solar system explained
Copernicus's revolutionary theory: The Sun as the center
See All Videos and Images →

Related Topics and References

Topics
Dig Deeper: More Articles That Discuss This Topic

Key People

James Peebles
American physicist
Democritus
Democritus
Greek philosopher
Fred Hoyle
Sir Fred Hoyle
British mathematician and astronomer
Pierre-Louis Moreau de Maupertuis
French mathematician and astronomer
Saul Perlmutter
Saul Perlmutter
American physicist

Related Quizzes and Features

Quiz
Ursa major constellation illustration art. (Big Dipper) stars, space, night sky)
Stars: Explosions in Space
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
List
Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003
9 Britannica Articles That Explain the Meaning of Life
Demystified
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?
Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles
Why Is Pluto No Longer a Planet?
Large Magellanic Cloud (LMC) new star formation. Satellite galaxy of the Milky Way. This galaxy is scattered with glowing nebulae, the most noticeable sign that new stars are being born.
Was the Big Bang Actually an Explosion?