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  • 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
  • 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 in order to explain their origin and their overall evolution Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets
  • 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 101: The Basics of Learning Astronomy - ThoughtCo
    Astronomy is the study of the universe, starting with stargazing and observing celestial bodies Professional astronomers study stars, planets, and galaxies to understand the universe and its origins Astronomy uses tools like telescopes and probes to explore and learn about distant space objects Astronomy is one of humanity's oldest sciences
  • Astronomy - Science News
    At 300 light-years away, the interstellar cloud is the closest of its kind ever found to Earth and the largest apparent single structure in the sky Hubble is still going strong 35 years after it
  • Sky Telescope | Your Guide to Astronomy the Night Sky
    Explore the universe with Sky Telescope - your ultimate source for stargazing, celestial events, and the latest astronomy news
  • Astronomy Magazine: Space News, Observing, Planets, Galaxies
    Each issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more!
  • 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
  • What is Astronomy? | Tucson Amateur Astronomy Association
    Astronomy is the scientific study of celestial objects (such as stars, planets, comets, nebulae, star clusters and galaxies) and phenomena that originate outside the Earth’s atmosphere (such as the cosmic background radiation)
  • 17 Branches of Astronomy - Earth How
    Astronomy applies the concepts from physics, biology, and geology to explain their origin and evolution We can divide astronomy into 4 sub-fields: ASTROPHYSICS: Applying the laws of physics in space; ASTROMETRY: Mapping celestial bodies; ASTROGEOLOGY: Examining rocks, terrain, and material in space; ASTROBIOLOGY: Searching for life outside Earth





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