Space+Project+Montana

My Space Project .1 What Is an Orbit? An orbit is the motion that an object travelling through space takes when it's drawn to a larger object than it-self. It is drawn to this object because it has a much more larger amount of gravitational pull force.
 * = look underneath the text to find the meanings if you don't under stand.

What is the Difference Between the Inner Planets and the Outer Planets? Our solar system is divided into groups, ' the inner planets' and 'the outer planets'.The inner planets are the first 4 planest from the sun, Mercury, Venus, Earh and Mars, and the outer planets are Jupiter, Saturn, Uranus and Neputne. These 2 groups are seperated by an asteroid belt.*

Inner Planets These 4 inner planets are called 'Terrestrial Planets' *. The inner planets are very much like each other, they are all made out of the same thing, mostly rock and heavy metals. The inner planets have a solid surface to land on, very much just like earth. These planets contain very heavy metal, such as iron and nickle.



Outer Planets The outer planets are also called 'Jovain Planets' or 'Gas Giants'. Like then inner planets, the outer planets are much like each other. The are all made ofmainly composed of gas, though they still have many more contents to them. Somewhere at the center is what scientist refer to as a 'Rocky Core'. The outer planets have dozens moons each. The inner and outer planets are separated by the astroid belt.* The outer planets are much larger than the inner planets, that they make up 99% of the mass of the celestial bodies* that orbit the sun.




 * An astroid belt is where you can found a huge amount of astroids.
 * Celestial means the main part of something.
 * Terrestrial means that the planets surface is solid and not gas.

What is the Force Called Gravity? Gravity is the force that attracts anything and everything to it. It is like a giant magnet if you like. Every planet has some sort of gravity, wether it be grater or saller than earths. It is what holds everything in place on earths surface. It pull everthig down so that it doesn't just float away. Gravity was first discribed and discovered by Isaac Newton. He developed the laws of gravity by which he saw it. This very, very. very historic discovery was discoved like this, Isaac Newton was sitting beneath an apple tree when an apple dropped on his head and this inspired him to create his universal theory of gravitation.



Murcury How far away from the sun = **57,910,006 km**  How big = **3.8 sextillion tons**   How long does it take to orbit the sun= **88 days** Venus How long from the sun = **108,200,000 km**  How big = **6.2 sextillion tons**   How long does it take to orbit the sun = **225 days**.

Ea rth How long from the sun = **149,599,951 km.**  How big = **6.6 sextillion tons.**   How long does it take to orbit the sun = **365 days** **.** Why Does Earth Have Seasons? If earth was standing straight up, every day would be 12 hours long, and every month would be the same temputure every day! How boring! It's this tilt that causes the seasons, not the distance to the sun. Earth has seasons because it is tilted on an axis as it rotates and revolves around the sun. In winter, we are facing down wards (southern hemisphere). In summer, we are facing the sun, but now because the hole in the O-zone layer is getting bigger, and the hotter it is becoming, and to make it worss, Australia is right in the midlle it!

What are the Moon's Phases? Why Does This Happen? This happends because the rotation of the moon around the earth rotating around the sun. The sun projects light on the moon, which causes all these different phases, it all depends on where the moon is though. We can only see one side of the moon, the other side is called 'the dark side'. Da Da Daaa!



Mars How long from the sun = **240,757,783.**  How big = **6.5 sextillion tons** How long does it take to orbit the sun = **687 days**

Jupiter -﻿ How long from the sun = **778,330,257 km.** -How big = **.8 sextillion tons** -How long does it take to orbit the sun = **4,332 days ﻿ **. ~INTERRESTING FACTS ABOUT JUPITER~ 1. Jupiters mass is 381 times earth. In fact Jupiter has 2.5 times the mass of all other planets in the solar system put together! 2. If Jupiters mass got an greater than what it already is it woud actually start getting smalller because it would start pulling its self into it! 3. Jupiter would have to be 70 times it's mass to be able to cause a nucular fusion and become a star! 4. Jupiter only takes 10 hours to complete a full rotation of its axsis! 5. The clouds on Jupiter are only 50kms thick! 6. The great Red Spot. One of the most know things about Jupiter. it was discover 350 years ago and measured 4,000kms accross, but now its is just half of that. Scientists don't even know when it will shrink and dissapear! 7. Jupiter actually has rings! It was the 3rd set of rings found in the solar system after Saturn and Uranas but they are very faint, they are even more faint thank Saturns. 8. Jupiter's magnetic force is 14 times greater than the one of earths! 9. Jupiter has a massive 63 moons! 10. Jupiter has been visited 7 times by spacecraft. 11. Jupiter is visible to the human eye! you can see it in the night sky. It's the 3rd most brightest thing in the sky afetr theVenus and the Moon ofcourse!

Saturn How long from the sun = **1,429,400,028 km.** How big = **11 sextillion tons** How long does it take to orbit the sun = **10,760 days.**

Uranus How long from the sun = **2,870,989,228** How big = **9.7 sextillion tons** How long does it take to orbit the sun = **30,700 days**

Neptune How long from the sun = **4,620,409,288 km.** How big = **9.2 sextillion tons** How long does it take to orbit the sun = **60,200 days.**

**__ Star Lab __** 1. It takes 28 days for the moon to circle the sun. 2. It takes 29 days to become a full moon from the previous full moon. 3. Jupiter is just a big ball of gas. 4. all the outer planets are just big balls of gas. 5. all the outer planets have rings around them 6. one of the outer planets have multiple rings around it. 7. The largest astroid ever found is 55km long! 8. Blown up stars create black holes. 9. The sun will keep on getting bigger and then will shrink again. 10. Mars has the largest mountian in the solar system. It's bigger then victoria and higher then Mt Everest.

Bibliography [|www.convertit.com/Go/ConvertIt/Measurement] 26/10/10 I used this to convert miles into km. sed for distance from sun. Date viewed - 26/10/10 [|www.gogle.com/images] Date veiwed - 26/10/10 [|www.universetoday.com/34577/inner-and-outer-planets/] Date viewed - 26/10/10 [|www.wiki.answers.com/Q/how_much_do_the_planets_wiegh] Date viewed - 26/10/10 [|www.wiki.answers.com/Q/how_far_away_is_each_planet_from_the_sun] Date viewed - 26/10/10 [|www.wiki.answers.com/Q/how_long_does_it_take_for_each_planet_to_orbit_the_sun]