
Astronomy | Definition, History, Discoveries, & Facts | Britannica
Nov 14, 2025 · Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Since the late 19th century, astronomy has expanded to include astrophysics, the …
Astronomy - Wikipedia
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry to explain their origin and their overall …
Astronomy Magazine: Space News, Observing, Planets, Galaxies
Astronomy Magazine – Your source for the latest news on astronomy, observing events, space missions, and more.
Astronomy for Beginners | Night Sky Facts, FAQs & Resources
We provide a rich supply of information and resources on astronomy for beginners. Download our free guide to beginning stargazing - great for clubs to hand out to members, too!
What is Astronomy? - AMNH
Astronomy is the study of everything in the universe beyond Earth’s atmosphere. That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars .
Astronomy: Everything you need to know | Space
Jul 25, 2023 · Astronomy is one of the oldest scientific disciplines. Explore what it is and how it's shaped our understanding of the world around us in our ultimate guide.
Astronomy - Scientific American
Nov 19, 2025 · Astronomy coverage from Scientific American, featuring news and articles about advances in the field.
Astronomy 101: The Basics of Learning Astronomy - ThoughtCo
May 6, 2025 · Learn the basics of astronomy and how it helps scientists understand everything from planets and moons to galaxies and the structure of the universe.
Sky & Telescope | Your Guide to Astronomy & the Night Sky
2 days ago · Explore the universe with Sky & Telescope - your ultimate source for stargazing, celestial events, and the latest astronomy news.
天文・宇宙開発ニュース 第1077号 – 合同会社 渡鴉
Oct 31, 2025 · https://sorae.info/astronomy/20251027-eso-577-24.html ダークエネルギーカメラが観測した“ケンタウルス座”の銀河団「Abell 3754」<sorae>