Sunday, 4 December 2011
The Moon is the brightest objects in the night sky.However,it does not emit light.The Moon appears bright at night because it reflects light from the Sun to the Earth.
From the Earth,the Moon looks like it is changing its shape.Actually it does not.It is caused by the different positions of the Moon that we see from the Earth.This is called the phases of the Moon.There are four major phases of the Moon.
Posted by choosiowling at 01:38
Sunday, 27 November 2011
The Earth takes 24 hours to make one complete turn.
Why do we have day and night?
We have day and night because the Earth rotates. It spins on its axis, which is an imaginary line passing through the North and South Poles.
The Earth spins slowly all the time, but we don't feel any movement because it turns smoothly and at the same speed.
How long does it take the Earth to turn around?
The Earth takes a whole day (24 hours) to makea complete turn.
Why is the Sun in the sky at some times and not at other times?
At any time half of the Earth faces the sun. This part has day. The other half of the Earth faces away from the Sun. It receives no light. It is dark and has night.
The sun is the source of light for day.
Why does the sun seem to move across the sky?
The Sun does not move. It seems to move across the sky starting in the east in the morning, moving toward the south at noon, and then toward the west as the day ends.
It is the Earth turning that makes it seem as though the Sun is moving.
Posted by choosiowling at 19:13
Saturday, 26 November 2011
Scientists have calculated that the Sun is one hundred times the size of Earth.Earth is four times the size of the Moon.
The distance from Earth to the Sun is 400 times the distance from Earth to the Moon.
Do You Know?
Long long ago,it was believed that the Sun was 70cm in diameter.We know that it is 1392 000kn in diameter.
Posted by choosiowling at 20:55
Friday, 25 November 2011
The sun and the nine planets are part of the Solar System.The nine planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.The Sun is in the center of the Solar System.All the nine planets move around the Sun in a large oval path.The planets also spin by itself.
Posted by choosiowling at 19:30
Posted by choosiowling at 18:26