Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
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Readers' pathsAug 2026 – Oct 2026
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CEERS-93316
Possibly one of the oldest galaxies observed.
9.4%
Cepheid variable
Type of variable star that pulsates radially.
7.9%
Great Debate (astronomy)
1920 debate between Harlow Shapley and Heber Curtis on whether there were other galaxies.
5.7%
Magellanic Clouds
Two dwarf galaxies orbiting the Milky Way.
5.3%
Webb's First Deep Field
First operational image from NASA's James Webb Space Telescope.
5.2%
Andromeda Galaxy
Barred spiral galaxy in the Local Group.
4.2%
Observable universe
All of space observable from the Earth at the present.
4.2%
NeVe 1
Galaxy in the constellation Ophiuchus.
4.1%
Cosmology
Study of the universe.
3.9%
Milky Way
Galaxy containing the Solar System.
3.9%
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Outer space
Void between celestial bodies.
17%
Galaxy
System of stars and interstellar matter.
13%
Pisces–Cetus Supercluster Complex
Galaxy supercluster complex containing the Virgo Supercluster.
8.8%
Astrophysics
Subfield of astronomy.
5.9%
Timeline of cosmological theories
3.6%
Galaxy groups and clusters
Largest known gravitationally bound object in universe; aggregation of galaxies.
2%