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Astronomy - Wikipedia
"Astronomy" and "astrophysics" are broadly synonymous in modern usage. [3][4][5] In dictionary definitions, "astronomy" is "the study of objects and matter outside the Earth's atmosphere and of their physical and chemical properties", [6] while "astrophysics" is the branch of astronomy dealing with "the behavior, physical properties, and ...

Astronomy Magazine: Space News, Observing, Planets, Galaxies
Astronomy.com is for anyone who wants to learn more about astronomy and space, including planets, galaxies, asteroids, and NASA.

Astronomy: Everything you need to know | Space
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 - NASA
National Aeronautics and Space Administration NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. About NASA's Mission Join Us

Astronomy | Definition, History, Discoveries, & Facts | Britannica
Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Since the late 19th century, astronomy has expanded to include astrophysics, the application of physical and chemical knowledge to an understanding of the nature of celestial objects.

NASA
NASA.gov brings you the latest news, images and videos from America's space agency, pioneering the future in space exploration, scientific discovery and aeronautics research.

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 . It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles. And it even includes questions about things we can't see at all, like dark matter ...

Outline of astronomy - Wikipedia
Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).

Latest Astronomy News & Space Exploration
Stay updated with the latest astronomy news and space exploration discoveries. Explore breakthroughs in cosmology, exoplanets, telescopes, and space missions.

Astronomy Picture of the Day
Astronomy Picture of the Day Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.