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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. … 展开
The main source of information about celestial bodies and other objects is visible light, or more generally electromagnetic radiation. Observational astronomy may be categorized according to the corresponding region of the electromagnetic spectrum 展开
Astronomy is one of the sciences to which amateurs can contribute the most.
Collectively, amateur astronomers observe a variety of celestial objects and phenomena sometimes with consumer-level equipment or equipment that they build themselves 展开Ancient times
In early historic times, astronomy only consisted of the observation and predictions of the motions of objects visible to the naked eye. In … 展开Theoretical astronomers use several tools including analytical models and computational numerical simulations; each has its particular … 展开
Astronomy and astrophysics have developed significant interdisciplinary links with other major scientific fields. Archaeoastronomy is the study of ancient or traditional astronomies … 展开
CC-BY-SA 许可证中的维基百科文本 Astronomy: Everything you need to know | Space
Astronomy | Definition, History, Discoveries, & Facts | Britannica
- A central undertaking in astronomy is the determination of distances. Without a knowledge of as…
Britannica Quiz - Constellations of the Zodiac and Their Signs Quiz
Two general methods for determining galactic distances are described here. In the first, a clearly identifiable type of star is used as a reference standard because its luminosity has been well determined. This requires observation of such stars that are close enough to Earth that their dist…
- A central undertaking in astronomy is the determination of distances. Without a knowledge of as…
Astronomy - Ancient, Celestial, Observations | Britannica
网页2024年7月26日 · Astronomy - Ancient, Celestial, Observations: Astronomy was the first natural science to reach a high level of sophistication and predictive ability, which it …
Astronomy 101: The Basics of Learning Astronomy
网页2019年7月3日 · Astronomy is one of humanity's oldest sciences. Its basic activity is to study the sky and learn about what we see in the universe. Observational astronomy is an activity that amateur observers enjoy as …
What is Astronomy? - AMNH
网页Learn the basics of astronomy, the study of everything in the universe beyond Earth's atmosphere. Explore the big ideas of astronomy, such as patterns, distances, motion, gravity, light, and invisible stuff, with …
Astronomy - Solar System, Planets, Stars | Britannica
网页2024年7月26日 · The solar system took shape 4.57 billion years ago, when it condensed within a large cloud of gas and dust. Gravitational attraction holds the planets in their elliptical orbits around the Sun. In addition to …
History of astronomy - Wikipedia
网页The origins of astronomy can be found in Mesopotamia, the "land between the rivers" Tigris and Euphrates, where the ancient kingdoms of Sumer, Assyria, and Babylonia were located. A form of writing known as …
NASA Astrophysics - NASA Science
网页NASA’s Astrophysics Division is dedicated to exploring the universe, pushing the boundaries of what is known of the cosmos, and sharing its discoveries with the world. The Division continues expanding humanity’s …
1.1 The Nature of Astronomy - Astronomy 2e - OpenStax
网页The Formation and Evolution of Galaxies and Structure in the Universe. Astronomy is defined as the study of the objects that lie beyond our planet Earth and the processes by …
