the.com/astronomy
the only science where looking at the past requires no time machine, just patience.
means The scientific study of celestial objects—stars, planets, galaxies, and the rest of the universe beyond Earth's atmosphere.
from From Greek 'astronomia,' built from 'astron' (star) plus 'nomos' (law or arrangement)—literally 'the ordering of the stars.' It traveled through Latin into Old French and on into English. Its near-twin 'astrology' once meant much the same thing; only later did the two part ways, one keeping the rigorous science of how the heavens move, the other taking the fortune-telling.
- light delay
- The sun you see is eight minutes old.
- oldest science
- Babylonians charted planets 3,000 years ago.
- cosmic recipe
- Your atoms were forged inside dying stars.
- scale
- More stars exist than Earth's grains of sand.
- sound barrier
- Space is silent; no air carries the screams.
hubble space telescope — orbiting observatory launched 1990, discovered accelerating universe expansion
event horizon telescope — global network that imaged first black hole m87* in 2019
james webb space telescope — infrared observatory launched 2021, observes earliest galaxies and exoplanet atmospheres