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 evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars ... Astronomy was born out of humankind's ancient fascination with the star-studded sky. Astronomy.com is for anyone who wants to learn more about astronomy and space, including planets, galaxies, asteroids, and NASA. 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. Stay updated with the latest astronomy news and space exploration discoveries. Explore breakthroughs in cosmology, exoplanets, telescopes, and space missions. For related background details, please refer to our report on gfci wiring line vs load. Your daily source for space and astronomy news. Expert coverage of NASA missions, rocket launches, space exploration, exoplanets, and the latest discoveries in astrophysics. Sky & Telescope | Your Guide to Astronomy & the Night Sky 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 ...

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