By: Andrew, Radit, kevin/6B Planetary Facts By: Andrew, Radit, kevin/6B

What is Solar System Solar System is a system with Celestial Objects ,Properties include Star, Meteor, Comet , planet , Moons , Asteroid , Nebula and Rings. The sun is the center of the Solar System. All 9th planet revolve around the sun. The moons revolve around the planet and the planet rotate every day. ( only the planet that has moon

Celestial Objects in Solar System

Sun Sun is a star and the center of the solar system everything revolve around the sun. Sun is the biggest thing in the solar system. Sun contains 70% hydrogen 28 % helium and 2% metal. Sun have a big black spot called the sun spot.

Mercury Mercury is the nearest planet to the sun and the closest planet to the sun. Mercury is also the hottest planet in solar system. Mercury is a planet that have moons. Mercury is the smallest terrestial planet

Venus Venus is the second planet from the sun. Venus is also called earth sister because of the size is almost like earth. In the 1970s, the Soviet Union actually was able to land more than one probe on the surface of Venus. These scientific probes only lasted a few hours before they were destroyed by the intense heat of the planet. These probes were able to take several pictures and send them back to earth for scientists to study.

Earth The Earth is the biggest of all the terrestrial planets. A terrestrial planet is a dense planet found in the inner Solar System. The diameter of Earth is 7,926 miles. The circumference measured around the equator is 24,901 miles. There are currently almost 7 billion people living on the Earth. About 30% of the Earth's surface is covered with land, while about 70% is covered by oceans.

Mars Mars is also called the red planet. Mars excites scientists because its mild temperament is more like the Earth's than any of the other planets. Evidence suggests that Mars once had rivers, streams, lakes, and even an ocean. As Mars' atmosphere slowly depleted into outer space, the surface water began to permanently evaporate. Today the only water on Mars in either frozen in the polar caps or underground.

Jupiter Jupiter is a The biggest planet in solar system and Part of Gas Giants. Jupiter is by far the largest planet in our Solar System. The Earth could fit inside Jupiter more than 1000 times. Jupiter is a very stormy planet. There are storms found throughout the atmosphere, and most of the storms seem to never end. The many different cloud formations and storms in the atmosphere also make Jupiter a very colorful planet.

Saturn n many ways, Saturn is similar to Jupiter, but it is much smaller. It is the second largest planet in our Solar System and it is a gas giant like Jupiter. Under the clouds of methane, hydrogen and helium, the sky gradually turns into liquid until it becomes a giant ocean of liquid chemicals.

Uranus Like Jupiter and Saturn, Uranus is a gas giant. But Uranus is a little different. Unlike all the other planets and most of the moons in our Solar System, Uranus spins on its side. It is believed that long ago a very large object smashed into this planet. The crash was so powerful that it completely changed the direction of Uranus' planetary rotation. However, a more recent theory is that the extreme tilt of Uranus' axis may have been caused by a large moon that was slowly pulled away from the planet by another large planet long ago when our Solar System was still new. It is thought that the gravitational pull of this moon moving away from Uranus may have caused it to tilt on its side.

Neptune or many, centuries people did not know that this planet even existed. It was discovered by Johann Galle and Heinrich D'Arrest in 1846. Neptune is the smallest of the four gas giants in our Solar System. Much like Saturn and Uranus, Neptune's atmosphere contains hydrogen, helium and methane.

asteroids An asteroid is a large rock in outer space. Some, like Ceres, can be very large, while others are as small as a grain of sand. Due to their smaller size, asteroids do not have enough gravity to pull themselves into the shape of a ball. Astronomers group asteroids into different categories based on the way they reflect sunlight.

Comet A comet is a small world which scientists sometimes call a planetesimal. They are made out of dust and ice

Kuiper Belt or Asteroid Belt Kuiper belt is a belt like an orbit between Mars and Jupiter in the belt there is a lot of asteroid that come in different shape and size

Comparison Earth and Saturn

Diameter Saturn Earth 36,184 miles 7,918 miles

Mass Saturn Earth 568.3E24 kg 5.972E24 kg

Distance from the sun Saturn Earth 1.51 billion km 92,960,000 miles

Comparison Neptune and Earth

Diameter Neptune Earth 30,599 miles 7,918 miles

Mass Neptune Earth 102.4E24 kg 5.972E24 kg

Distance from Sun Neptune Earth 2,798,000,000 miles 92,960,000 miles

Similarity and differences

Differences: Saturn and Earth earth is small, rocky, and closer to the sun. Earth also has water and life. It has only one moon. Saturn is large, composed of gas, farther from the sun, and has many moons and rings. I'm not sure, but I think that it was Saturn that had the moon, Europa, with an icy surface that they were looking for life on. Earth is a terrestrial planet and have live and Saturn is a gas giant and has no live Earth does not have ring and Saturn have ring

Similarity : Saturn and Earth 1. Orbit the sun. 2. Rotates on an axis 3. Are too small to be a star. 4. Have a least 1 moon.

Differences: Neptune & Earth Earth has life and Neptune doesn'tEarth's length of day is 24 hours and Neptune's is 16.1 hoursNeptune has rings and Earth doesn'tNeptune's average temperature is -214 degrees Celsius while Earth's average temperature is 15 degrees CelsiusThe two planets are made of different elements Neptune is different from the Earth because it is colder than the earth and it is 34 times bigger and Neptune is also blue.

Similarity : Neptune and Earth They're both blue and are that colour for similar reasons . The surface gravity is similar and the rocky centre of Neptune is close to Earth's in size. They are both planet in solar system

Conclusion Earth is good planet to live because It has support humanity life and meet the requirement For Example Earth have the right temperature not hot and not cold. Earth also have atmosphere to block of Sun Radiation and only get the heat. Earth also the right gravity so we do not fly around the air. Earth also have resources to support human live.

Bilbiography http://nineplanets.org/sol.html http://www.kidsastronomy.com