Tag Archives: Stars
What is a light-year?
Space is so vast that astronomers don’t use miles to measure how far stars are away from us. The numbers of miles would be so large that you would have a difficult time using them. Instead, astronomers use what they call “light-years” to measure great distances. A light-year is the number of miles that light …
What is a milky way?
If you have ever looked at the sky on a clear night, then you have probably seen a milky-looking path of light across the sky. This is the Milky Way. It is actually the light from many billions of stars, most of which are too far away to be seen as separate stars. The huge …
Why doesn’t the North Star move in the sky?
If we look at the stars, and then look again an hour or so later, we see that the spinning of the earth makes all the stars but the North Star seems to change positions in the sky. The North Star does not appear to move because it lies almost directly over the North Pole, …
What are stars made of?
Stars are formed from gigantic masses of hot glowing gases. Hydrogen and helium are the most common gases in a star. In the clearest night sky you might see a few thousand stars with unaided eye. Every bright star is a sun, like our own sun. Scientists tell us that a star is a huge …
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