History of Astronomy
How humanity came to understand the universe — from the first sky-watchers to the age of gravitational waves. Each lesson connects to real astronomers, discoveries, and eras in the knowledge graph.
Related entities
- Astronomer
Galileo Galilei
Galileo Galilei was an Italian astronomer and physicist who pioneered telescopic astronomy, discovering the four largest moons of Jupiter.
- Astronomer
Edwin Hubble
Edwin Hubble was an American astronomer whose observations established that the universe is expanding and that galaxies lie far beyond the Milky Way.
- Discovery
The First Detection of Gravitational Waves
On 14 September 2015 the LIGO observatories recorded a ripple in spacetime from two merging black holes 1.3 billion light-years away — the first direct detection of gravitational waves.
- Era
The Scientific Revolution
In little more than a century, astronomy was remade. The telescope opened the sky, Kepler found that planets move in ellipses, Galileo turned observation into evidence, and Newton's universal gravitation united the heavens and the Earth…