By looking at the sky during a cloudless night, we can observe a lot of luminous points. They are known as the stars.
The whole set of stars in space are what make up the Universe or the Cosmos.
There are different types of cosmos. The most important are the following: stars, planets, satellites, and comets.
2. The Stars
Stars are celestial bodies that produce their own light, and are composed of hydrogen and helium. Stars have an extremely high temperature, and can reach up to 16 million degrees centigrade.
In the Universe there is an incalculable number of stars, which are more than four light years away from the Earth – except for the Sun, which is the nearest star to our planet Earth. (One light year is the distance that light travels 300,000 KM per second during one year).
A). Indicate whether the sentences below are true or false: