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Reasons As To Why Stars Twinkle While Planets Doesn't Seem To.. by dynicks(m): 7:42am On Jun 16, 2016 |
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’d could see
planets as disks if you looked through a
telescope, while stars would 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. |
Re: Reasons As To Why Stars Twinkle While Planets Doesn't Seem To.. by donbenedict(m): 8:18am On Jun 16, 2016 |
Twinkle twinkle little star Abeg make person complete this rhyme if u go nursery school |
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