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The definition of a galaxy is a huge collection of stars, gases, dust, rocks, and sometimes black holes. our galaxy is a spiral galaxy  which means if you saw our galaxy from another galaxy it would look like an pinwheel
example:

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According to astronomers, Pluto isn't a planet. Here's why, the first red flag was that it was the smallest planet, about 736 miles! to give you a comparison the second smallest planet, Mars, is 6792km across! so Pluto is small. The second red flag was that, Pluto was  found in the Kuiper Belt, with icy chunks the size of Pluto! Some say that Pluto is no more a planet than those icy chunks. Pluto's temperature is -229°c [or -380°f]
Another red flag was that Pluto had an unusual orbit. that doesn't sound to bad, but Pluto over laps Neptune orbit, #Rude, take it from me Pluto isn't a planet, it never was.

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Our galaxy has a huge black hole in the middle. it also has stars, A LOT of stars. Did you know that there are different types of stars? Ya! there are three types of stars, the newer, bluer stars, the middle aged, yellow stars and the oldest, the red stars. Our sun is a yellow star. Another thing in our galaxy is the gases. Some gases are unknown, but the ones that are known are, hydrogen, helium, Carbon Monoxide, and Hydroxyl.

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Inner and outer planets are VERY different, and VERY similar.

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Inner and outer planets are VERY different, and VERY similar.

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First, lets state the obvious. They're all in space, and they're all planets is what you are probably thinking, but actually that ids the least of all of the similarities and differences these planet groups have. To start off, theses space spheres have huge climate differences. For example, Mercury can have  temperatures up to 465°F/870°C! Meanwhile Neptune has temperatures around -353°F/   -214°C! Crazy, right? Also, they can be separated by gaseous planets and rocky planets. Outer planets are gaseous, and inner planets are rocky. Moving on, both inner and outer planets all (for the most part) have moons.

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What are outer planets, and how would you characterize them?

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What are outer planets, and how would you characterize them?

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Outer planets are all made out of gas, high winds, many moons, cold weather, high pressure, rings, and they are all larger than inner planets. Jupiter is the fifth, and largest planet in our solar system. One thousand three hundred twenty-five Earths could fit inside of it. Also, anything that goes inside of Jupiter's atmosphere will get crushed because of its high pressure. Mars has a very little amount of rings, and they are hard to see, but Jupiter has many moons. No moon is ever the same.

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Saturn is the sixth, and second largest planet. It has sixty moons at the least, and Saturn's wind speeds are three times a powerful tornado. Saturn's rotation is 10 hours and 14 minutes long, and the revolution is 10,759 Earth days! It has rings that are made up of rock and ice remains,

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Uranus is the seventh, and third largest planet. Its atmosphere is made of hydrogen and helium gases with at least 27 moons. Uranus is about three times larger than Earth, and some scientists believe that there may be an ocean deep in Uranus' atmosphere.

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Neptune is the last planet. It has 13 known moons and a few faint rings. The winds on Neptune are the fastest at 1,800 feet per second. This blue planet may have a boiling ocean even though the temperature is -353ªF/-214ªC.

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Now, even though all of these planets have natural satellites (also known as moons), they all have different amounts of them. Furthermore, Jupiter has 62 moons at the least, and Earth only has one. Another example, all of the planets in our solar system orbit the Sun. Even though they may be closer to the Sun than others, they all still revolve around a big ball of glowing gases.

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That reminds me, it takes longer distances to revolve around the Sun for outer planets. While it takes 10,759 Earth days for Saturn to take a full rotation around the Sun, it only takes 88 days for Mars. Lastly,they all make rotations. A rotation is what causes days and nights. In conclusion, there are many similarities and differences between inner and outer planets.

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That little light in the sky during the daytime is called the Sun.

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That little light in the sky during the daytime is called the Sun.

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Last but not lest we have, Asteroids and Comets. First Comets. Comets are small things we can't see from Earth. Comets are also known as shooting stars. Because comets are made of rock an ice when it passes by the sun and the ice melts forming the coma, or the tail. They can be found in the Kuiper Belt and the OortCloud.

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The sun is an average sized, middle aged, yellow star. In other words, it could fit about a million Earth sized planets inside of it. It's also about 10,000°F on its surface, which is just right for us humans to survive on Earth. Plus, our Sun is the most active star in our solar system. It is so hot, and filled with tons of boiling gases. Some of those gases fly out into space and actually hit Earth! Another the Sun produces light and heat, and over time when it grows cooler, and turns into a red star, Earth's wildlife will eventually die out.

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Asteroids are made out of rock and metal. They can range in size from 1000km to as small as a grain of sand. Most asteroids are found in a ring between Mars and Jupiter, called the asteroid Belt. Asteroids are believed to be debris from collisions.

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Furthermore, the Sun is made up of hydrogen and a little bit of helium. So, basically our Sun is a big, yellow, ball of gas that lives in space. Next, the Sun is very heavy! It outweighs everything in the solar system CONBINED! Our Sun is very interesting, and if it was not a part of our solar system, we would never be here.

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What are inner planets, and how would you characterize them?

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What are inner planets, and how would you characterize them?

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Inner planets all tend to have gaseous atmospheres, warm or hot temperatures, and minimal to no moons. Mercury is the smallest, fastest, and closest planet to our Sun. Due to the fact it has no atmosphere, no one can visit. This cratered planet has wild temperatures- VERY hot days, and VERY cold nights.

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What Are the Characteristics of Inner Planets? -Dylan Castellano

What Are the Characteristics of Outer Planets -Dylan Castellano
What Makes Up Our Galaxy? -Nora Lapierre
All About the Sun -Dylan Castellano
Differences Between Inner And Outer Planets? -Dylan Castellano
All About Moons -Lily Anderson
All About Asteroids -Lily Anderson
Why is Pluto Not a Planet? -Nora Lapierre
Chart -Lily Anderson
Space Video -Nora Lapierre
Reference Page -Nora Lapierre

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Downiev, Fran. "Our Stormy Star The Sun."

"Solar System", Encyclopedia Brittanica.

Croswell, Ken, "Catching Andromeda's Light"

"Objects in Our Solar System", National Geographic, Big Ideas Book.

"The Inner Planets" National Geographics 5th Grade Big Ideas Book.

"The Outer Planets" National Geographic 5th grade Big Ideas Book.

Cutler, Nellie. "Eight Is Enough" Time For Kids FCAT Edition

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Venus is the hottest planet. It is also Earth's closest neighbor, and the second closest planet to the Sun. The atmosphere has so much pressure it could crush a car. No one would be able to live on Venus because it is too hot for water to be on its surface without boiling.

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Earth is the third planet from the Sun. It has a moon- a moon is a rocky object that orbits the Sun. Two features make living things survive on Earth- first, Earth has liquid water, second, Earth is a great distance from the Sun. No other planets provide these special characteristics.

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Mars is the fourth planet from the Sun. At nights it can be very cold, and it also contains things like hills, canyons, valleys, plains, and volcanoes, just like Earth. Mars has two moons- Phobos and Deimos. Some scientists think the fact they may have used to be asteroids, but Mars' gravity pulled them in to orbit around it.