Stars, planets, and the mysteries of the cosmos.
1 quizzesAstronomy is the oldest science and the most humbling. Long before electricity, before the telescope, before mathematics as we know it, human beings looked up at the night sky and tried to make sense of what they saw. The patterns they traced — the constellations, the planets, the movement of the Moon — gave birth to calendars, navigation, and the first scientific method: systematic observation over time.
The modern picture of the universe is almost incomprehensibly vast. The Milky Way contains between 100 and 400 billion stars, and it is one of at least two trillion galaxies in the observable universe. Light from the most distant galaxies has been travelling toward us since before the Earth existed. Black holes, neutron stars, dark matter, and the accelerating expansion of space itself are phenomena that push human understanding to its limit.
This category covers the solar system, stellar evolution, galaxies, cosmology, space exploration history, and the missions — from Apollo to the James Webb Space Telescope — that have extended human perception into the cosmos. Whether the night sky fills you with wonder or you're drawn to the physics of relativity, there's something here to expand your understanding of the universe we inhabit.
