earth, moon, and stars

• The Sun is at the center of our solar system.
• revolve - to move around another object.
• the earth takes about 1 year to revolve around the star
• what is the star the earth revolves around called? the sun
• revolution - the amount of time the earth takes around the sun
• orbit - the path that an object takes around another object in space, such as the earth's orbit around the sun
• rotate - to spin
• axis - an imaginary that runs through earths center from the north pole to the south pole.
• most of earths surface is covered by water
• the moon has no atmosphere, it is much smaller than the earth and the sun, and it has features like mountains and plains
• the sun is a star, it is a large ball of gas that produces its own light and is about 109 times larger than the earth
• earths spinning on its axis called rotations, which cause day and night
• the part of the earth facing the sun is daytime, and the part that is away from the sun experiences night time
• the moon is a satellite of earth, it revolves around the earth
• satellite - an object that orbits a larger object, such as a planet or a moon.
• earths orbit and the tilt of the earth axis causes the seasons
• the part of the earth that is tilted away from the earth has winter time, whereas the part of the earth that is tilted towards the sun has daytime
• the moon reflects light form the sun, it does not produce its own light
• fall and spring equinoxes occur when earths axis points neither away or toward the sun
• the first day of summer is the longest day of the year, and is known as the summer solstice
• the first day of winter is the shortest day of the year, and is known as the winter solstice
• we know that the earth spins on its axis because of the apparent movement of the sun throughout the day
• the moon takes about a month to revolve or go around the earth
• the suns gravity keeps the earth and other planets in orbit around the sun
• the earths orbit is elliptical in shape