The Earth's Moon
In space , the force of gravity causes jects to orbit larger objects .
Any object that orbits another object is called a satellite.
The earth is a satellite of the sun .The Earth's moon orbits the earth so the moon is a satellite of the earth. It takes the moon about 27.3 days to revolve once around the earth
Phases of the Moon.
On some nights,the moon appears in the sky as a bright circle.The mooon appears bright because it reflects the light from the sun. On other nights, the shape of the moon is different.Rge changing shapes of the mooon that we see from Earth are called phases of the moon.
As the moon orbits the earth,part of the moon is lit up by the sun while the other part is in darkness.The moon appears to change shape because the part of the moon lit up by the sun changes as the mooon orbits the earth .When the whole side of the moon seen from earth is lit up.We see less and less of the moon lit by the sun.
The moon appears to be getting smaller this is called waning . During this orbit around earth, the moon reaches a point where sunlight does not illuminate the part facing earth .The illuminated is facing away
From earth .This phase is called the new moon.
As the moon continues to orbit,more and more of it is visible.it keeps getting bigger in size and it is said to be waxing.
