Astronomy | Definition, History, Discoveries, & Facts | Britannica
WEBJul 26, 2024 · 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
WEBAstronomy 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.
Solar System Exploration - NASA Science
WEBThe solar system has one star, eight planets, five officially named dwarf planets, hundreds of moons, thousands of comets, and more than a million asteroids. Our solar system is located in the Milky Way, a barred spiral galaxy with two major arms, and two minor arms.
Universe - NASA Science
WEBWelcome to the Universe. Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more. Explore: Exoplanets. Stars. Black Holes. Galaxies. featured story. NASA’s EXCITE Mission Prepared for Scientific Balloon Flight. An infrared telescope called EXCITE will fly to the edge of space for a test flight.
Astronomy: Everything you need to know | Space
WEBJul 25, 2023 · Astronomy is one of the oldest scientific disciplines that has evolved from the humble beginnings of counting stars and charting constellations with the naked eye to the impressive...
Astronomy - Scientific American
WEBAug 21, 2024 · Astronomy coverage from Scientific American, featuring news and articles about advances in the field.
Nature Astronomy
WEBJul 15, 2024 · Nature Astronomy publishes research, reviews and commentary of the highest quality in all areas of astronomy, astrophysics, planetary sciences.
Stars - NASA Science
WEBStars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages.
’Starry Night’ captures the turbulent physics of why stars twinkle
WEB2 days ago · Science imitates art. ... Astronomy leads the astronomy hobby as the most popular magazine of its kind in the world. Get information about subscriptions, digital editions, renewals, advertising ...
Webb telescope blasts off successfully — launching a new era in astronomy
WEBDec 25, 2021 · The James Webb Space Telescope — humanity’s biggest gamble yet in its quest to probe the Universe — soared into space on 25 December, marking the culmination of decades of work by ...