Change Earth Earth In Physical Science Surface


Posted by Admin

Change Earth Earth In Physical Science Surface

Change Earth Earth In Physical Science Surface

The Moon is a familiar sight to anyone who has ever looked up at the sky at night (or even during the day). It has connotations of romance, mystery, and magic. What is often overlooked by many who take the sight of it for granted is that it is also an astronomical object, a planetary body like many others in the Solar System.

Lunar Numbers

The Moon has a radius of just under 1,100 miles, which puts it at roughly a quarter the size of Earth, its planetary sibling. Its day, the time it takes for the Moon to rotate once on its axis, is 29.5 Earth days long. This also is the time it takes for the Moon to appear to go through an entire cycle of lunar phases as it orbits the Earth.

The Moon is much less dense than Earth: despite being only a quarter of Earth's size, Earth is over 80 times more massive than the Moon. This is because the Moon is made out of lighter materials as a whole than Earth, which has a very dense core. Since the Moon has so much less mass than the Earth, it also has a great deal less gravitational force. Anyone who has ever seen video of astronauts on the Moon can see that they do not walk so much as bounce. This is because on the Moon they weighed only one-sixth as much as they weighed on Earth.