Skip to content

Traverse the graph
Tools
- CompareSide-by-side entities
- SearchThe whole knowledge graph
Hubs
More hubs
Guided
- Learning PathsStructured journeys
- TimelinesSourced chronologies
Featured paths
Open data
API
Reference
Platform
Contribute
About

Loading…

Loading content

A knowledge platform for everything above Earth — astronomy, space, the night sky, celestial events, mythology, and astrology as a clearly separate cultural tradition.

Astronomy is presented as scientific, evidence-based, and sourced. Astrology is presented as cultural, symbolic, and interpretive — never as proven science.

Astronomy

Stars
Constellations
Galaxies
Nebulae

Sky Guide

Night Sky Tonight
Moon Phase
Meteor Showers
Solar Eclipses

Astrology

Zodiac Signs
Birth Chart
Natal Chart
Rising Sign

Calculators

Natal Chart Calculator
Zodiac Sign Calculator
Rising Sign Calculator
Moon Sign Calculator

Encyclopedia

Glossary
History of Astronomy
History of Astrology
Ancient Civilizations

Observatory

Image Library
NASA Gallery
ESA Gallery
James Webb

Guides

Beginner Astronomy
How Stars Form
How Black Holes Work
How Telescopes Work

© 2026 Asteria Star. Everything above Earth — science and tradition, kept clearly apart.

About Editorial Policy Sources Policy llms.txt

Home
History of Astronomy
History of Cosmology

Discover

History of Cosmology

How we came to understand the origin, expansion, and contents of the universe.

7 entries.

Theory
The Heliocentric Model
1543 CE
Theory
General Relativity
1915 CE
Discovery
The Expansion of the Universe
1929 CE
Theory
The Big Bang
1931 CE
Discovery
The Cosmic Microwave Background
1965 CE
Discovery
Evidence for Dark Matter
1933 CE
Discovery
The Accelerating Universe
1998 CE