- ☀
- ⭐
- 🌅
- 🌇
- 🌌
- 🌑
- 🌒
- 🌓
- 🌔
- 🌕
- 🌖
- 🌗
- 🌘
- absolute magnitude
- Alcor
- Aldebaran
- Alpha Centauri
- Altair
- Andromeda Galaxy
- apparent magnitude
- Arcturus
- asterism
- astronomer
- Astronomy (Wikipedia)
Astronomy is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth’s atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole.
- Big Bang
- Big Dipper
- black hole
- Caph
- carbon star
- celestial sphere
- constellation
- Cor Caroli
- Deneb
- Earth
- Earth-Moon system
- eclipse
- Galactic Center
- galaxy
- galaxy filament
- Giausar
- gravity
- Great Attractor
- Great Red Spot
- Hubble Space Telescope
- infinity
- Jupiter
- Kochab
- Langrenus
- Laniakea Supercluster
- Local Bubble
- Local Group
- Local Interstellar Cloud
- Mare Crisium
- Mars
- Megrez
- Mercury
- Milky Way
- Mizar
- Moon
- Neptune
- northern celestial hemisphere
- observable universe
- Odyssey (children’s magazine) (Wikipedia)
- Orion Arm
- Pisces–Cetus Supercluster Complex
- planet
- Planetary Science
- Pleiades
- Pluto
- Polaris
- Proxima Centauri
- Saturn
- solar eclipse
- Solar System
- southern celestial hemisphere
- star
- star chart
- star log
- Summer Triangle
- Sun
- telescope
- Thuban
- universe
- Uranus
- Ursa Major Moving Group
- Vega
- Venus
- Virgo Supercluster