How are planets different from stars? Detailed answer

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How are planets different from stars? Detailed answer

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How are planets different from stars?

Even in ancient times, observers noticed that in the sky, in addition to fixed stars, there are special wandering bodies, and they called them planets (the word "planet" in Greek means "wandering").

At first glance, the planet and the star are really very similar. But if you look closely, you can see that the stars twinkle, and the planets shine with an even, calm light. This is because stars, like our Sun, are hot balls of gas, and planets do not have their own light, we see them because they reflect sunlight falling on their surface.

Through binoculars or a telescope, the planet is visible as a small bright circle, and any star is always a luminous point. If you watch the sky for several nights in a row, you will notice that the planets move against the background of stars that are fixed in relation to each other.

Author: Cellarius E.Yu.

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Schools in the US and UK have a new classroom survey technique. Each student is armed with a remote control like a conventional TV, and on the teacher's desk is a computer that can receive infrared signals from the remotes.

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There are about half a million such remotes in use in US schools alone.

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