Planets

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3.) What are the members of solar system picture, and definition of each member? Solar System
The solar system is made up of the sun, its planets, satellites, asteroids, meteoroids, and comets. Each of these bodies is held to each other by the force of gravity. Sun
A star that is the basis of the solar system and that sustains life on Earth, being the source of heat and light.

The sun is a medium sized star which is the center of the solar system. Its gravitational pull holds the planets, comets, etc. orbiting about it. It is the closest star to the earth at about 93,000.000 miles away. It is about 865,000 miles in diameter. Without the heat and light of the sun, there would not be life on earth. Solar energy is used by green plants for photosynthesis. The sun appears larger than the other stars because it is the nearest star to the earth. The sun is about 870,000 miles or 1,400,000 kilometers in diameter, and its volume is about 1,300,000 times that of the earth. Its mass is almost 700 times the total mass of all the bodies in the solar system and 332,000 times that of the earth. The sun's gravity is almost 28 times that of the earth.

The sun's surface is called the photosphere where its temperature is about 6,000 degrees Celsius. However, the temperature at its surface is about 6,000 degree Celsius however at core it is 15,600,000 degree Celsius.

Mercury:
Mercury is the nearest planet to the sun. It is around 36 million miles (58 million km) from the sun and takes 88 days for Mercury to orbit the Sun. It has a diameter of about 3,000 miles or 4,800 kilometers. Its density or thickness of the materials that make it up is similar to that of the earth. It is very small so it has less of a gravitational pull on other space objects. Small amounts of carbon dioxide have been detected on its atmosphere. Its rotation on its axis is equal to 59 earth days. This results in periods of daylight and night of 90 earth days.

Temperatures during the day get as high as 800 degrees Fahrenheit or 450 degrees Celsius. Night temperatures are thought to get as low as -300 degrees Fahrenheit or -180 degrees Celsius.

Venus:
Venus is the second planet from the sun. It is about .67 million miles or 107 million kilometers from the sun. Venus' year equals about 225 days and is the amount of time it takes Venus to orbit around the sun. It comes closer to the earth than any other plane.

It is covered with a thick layer of clouds and has a surface temperature of 890 degrees Fahrenheit or 476 Celsius. The cloud layer holds in the heat and keeps the planet much hotter than the earth. The thick atmosphere made up mainly of carbon dioxide, with a slight amount of water vapor and a bit of nitrogen and other elements. Venus rotates on its axis 243 earth days. The temperature is very similar on the lit (daytime) and unlit (nighttime) parts of the planet.

Earth:
Earth is the third planet from the sun and the fifth largest planet of the solar system and the only planet definitely known to support life. The distance from the earth to the sun is around 93 million miles. The force of gravity has molded the earth into a sphere. It is slightly flattened at the poles and bulges at the equator. The earth's diameter is around 7,926 miles or 12,760 kilometers and the polar diameter 7,900 miles or 12,720 kilometers. The circumference at the equator is around 25,000 miles or 40,000 kilometers. The surface of the earth is divided into dry land and oceans, the dry land takes up around 57.5 million square miles or 148.9 million square kilometers, and the oceans around 139.5 million square miles or 361.3 million square kilometers. The earth is surrounded by a band of gases called the atmosphere which is mostly nitrogen and oxygen.

It rotates or turns from west to east about a line called its axis. The period of one complete rotation is a day. Because of the rotation of the earth we experience day and night....
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