THE STARS
There are millions of stars in the sky. If you look [21] .................. the sky on a clear night, it is possible to
see about 3000 stars. They look small, but they are really [22] .................. big hot balls of burning gas. Some
of them are huge, but others are much smaller, like our planet Earth. The biggest stars are very bright, but
they only live for a short time. Every day new stars [23] .................. born and old stars die. All the stars are
very far away. The light from the nearest star takes more [24] .................. four years to reach Earth.
Hundreds of years ago, people (25) .................. stars, like the North Star, to know which direction to travel
in. Today you can still see that star.
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