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 evolution
Astronomy | Definition, History, Discoveries, Facts . . . 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: 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 NASA Continues to Study Pulsars, 50 Years After Their Chance Discovery
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