Astronomy is the scientific study of the cosmos, with a focus on celestial object movements, locations, sizes, compositions, and behaviors.
The term "universe" refers to the entirety of all matter and energy, whether or not they are visible to humans, that exist in the expanse of space.
A planet is an astronomical object that orbits a star but does not emit light of its own, particularly one of the solar system's planets that orbits the sun.
Astronomical object known as a star is often seen as a tiny, brilliant point of light in the sky.
An astronomical object makes one orbit around a bigger astronomical object.
Cosmonaut: An astronaut in Russia's and the former Soviet Union's space programs.
A galaxy is a collection of billions of stars, planets, gas, and dust that spans millions of light-years and functions as a single entity in the cosmos.
Eclipse: When another astronomical object comes in front of an observer's view of an astronomical object, such as the Sun or Moon, it partially or completely blocks the observer's view of the object.
An astronaut is someone who has undergone special training to operate in space.
Gravity is the attraction that an object experiences on or near the surface of the Earth or another astronomical object as a result of gravitational pull.
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