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Because the earth rotates and each part is illuminated as it turns 'toward' the sun and because the earth moves around the sun that's why.

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12y ago
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13y ago

Yes, this statement is always true.

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Q: When one half of earth has sunlight the other half is dark?
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Is half the moon always in the sunlight?

Yes. Exactly like the earth. Both of them are half-illuminated by the sun. You can understand why half can see the sun and the other half can't, if you think about what you can do with a tennis ball and a flashlight in a dark room.


Why the visible moons shape changes?

Only the half of the moon that is illuminated by sunlight will be visible; the other half is dark. Because the relative positions of the Earth, moon, and sun are always changing, the viewer on Earth will see varying amounts of the illuminated half of the moon.


At any one time half of the earth has sunlight?

At any one time half of the earth has sunlight and the other half does not. The half that has sunlight experiences day while the other half with no sunlight experiences night. Day and night happens because of earth's rotation.


What part of earth has night at the same time?

Half the Earth is light, the other half is dark. Anywhere on the dark half experiences night.


How much of earth is in sunlight when a autumnal equinox occurs?

Half of Earth is illuminated by the sun at all times.


Why is one half of earth alway dark?

Half of the earth is always dark because the Earth is opaque and the side facing the sun blocks sunlight from reaching the other side of the Earth. If we were in a star system with multiple stars we might have a chance of having more than half of the surface of the Earth illuminated but as we only have the one sun we will always have day and night. Note that strictly speaking the dark side of the earth is not totally dark - it gets some reflected light from the moon most of the time and a tiny bit of light from the stars, not to mention all the anthropogenic light sources that get switched on at night.


How much of earth is exposed to sunlight?

At any given time, half (50%) of Earth is exposed to sunlight.


What country on earth gets the sunlight first?

Since the sun only shines on one side of the Earth at a time, one half of the Earth is in darkness and the other half in sunlight. It is only as the sun rotates on it's axis that different areas of the Earth experience night and day. A country never gets sunlight "first", as the night and day around the Earth is constantly changing.


Is sunlight always shining on half of Earth?

Yes...


How much of the moon is always in the dark?

The moon is always half dark. The half facing the sun is light, the other half is dark.However, during a lunar eclipse, the moon would be temporarily all dark since it is in the shadow of the earth.


Does Venus have 1 hour of sunlight every 7 years?

No. Half of the planet would be in sunlight (day) while the other half would be in darkness (night), just like the Earth, with the exception of its rotational speed, which is about once every 243 Earth days, instead of Earth's 24 hours.


Why does half of earth experience night when the other half of earth is experiencing day?

The Sun is a single source of light. Therefore it can only shine its light on one side of the Earth at a time. The other side is then obviously dark. Try shining a torch on a tennis ball in a dark room. One side will by light and the other side will be dark.Apart from the dark and light part,there is also a part that is fairly dark known as the prenumbra. dark-umbra fairly dark-prenumbra