The study of space is called astronomy. It is the branch of science that deals with observing, researching and understanding celestial bodies such as stars, planets, galaxies and other phenomena that occur beyond the Earth’s atmosphere. Astronomers use a variety of tools, including telescopes and spacecraft, to observe and collect data about objects and events in space, enabling them to study the origin, evolution, and characteristics of the universe.
How many stars are there in the sky?
The exact number of stars in the sky is unknown. It is estimated that there are between 100 billion and 400 billion stars in our galaxy alone, and billions of other galaxies in the observable universe. Each of these galaxies can contain a varying number of stars. With such a large number, it is difficult to accurately count all the stars in the sky.
How many galaxies are there?
The exact number of galaxies in the universe is uncertain. However, based on observations and estimates, astronomers currently believe billions of galaxies exist in the observable universe. Given the limitations of the speed of light and the age of the universe, the observable universe refers to the portion of the universe that we can potentially see from Earth. Each galaxy can contain millions to trillions of stars, as well as various other celestial objects such as planets, asteroids, and comets. It’s worth noting that the universe is huge and expanding, so there may be more galaxies in total than we currently understand.
