Explain why stars Twinkle but sun and the planets do not twinkle at all.
Answers
Explanation:
Stars twinkle because they're so far away from Earth that, even through large telescopes, they appear only as pinpoints. Planets shine more steadily because they're closer to Earth and so appear not as pinpoints, but as tiny disks in our sky.
Answer:
Seen from space, stars and planets both shine steadily, But seen from Earth, stars twinkle while planets (usually) don’t. Here’s why.
Stars twinkle because … they’re so far away from Earth that, even through large telescopes, they appear only as pinpoints. And it’s easy for Earth’s atmosphere to disturb the pinpoint light of a star. As a star’s light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth’s atmosphere. You might think of it as the light traveling a zig-zag path to our eyes, instead of the straight path the light would travel if Earth didn’t have an atmosphere.
Planets shine more steadily because … they’re closer to Earth and so appear not as pinpoints, but as tiny disks in our sky. You can see planets as disks if you looked through a telescope, while stars remain pinpoints. The light from these little disks is also refracted by Earth’s atmosphere, as it travels toward our eyes. But – while the light from one edge of a planet’s disk might be forced to “zig” one way – light from the opposite edge of the disk might be “zagging” in an opposite way. The zigs and zags of light from a planetary disk cancel each other out, and that’s why planets appear to shine steadily.
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