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Astronomy 6th Class

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FC: A is for Astronomy | By Ms. Baumgardner's 6th Grade Class

1: A is for Astronomical Unit | The term for Astronomical Unit also, know as AU is the distance from the Earth to the Sun. The Astronomical Unit from the Sun to the Earth is 149,597,870.7 kilometers and 92,955,807.27 miles.The reason why we use Astronomical Units is so, we can measure the distance between the Sun and other planets.

2: B is for Black Hole. A Black Hole is a region of space which nothing can escape, not even light can escape a Black Hole. Did you know thats a Black Hole is a result of the formation of space-time caused by a very compact mass. A Black hole can observed even though it interacts with no matter. | This is a Black Hole in the Milky Way

3: C is for Constellations Constellation's are a group of stars that can be seen from earth. The stars in the sky are divided into 88 constellations. Many constellation are over 2,000 years old. Constellations are named after many Greek Gods. Some people say that many constellations have been here since the ice age.

4: D is for Dwarf Star. Dwarf Stars are stars that do a variety of things. Each Dwarf star has a different name and it does something totally different. White Dwarf stars represent the final stage in a main sequence star and a Red Dwarf represent low mass main sequence stars. next letter

5: E is for elliptical galaxy, one of the three main galaxies. Most of the elliptical galaxies are made up of low mass stars or very old stars. Elliptical galaxies have very little gas and dust. Edwin Hubble described the elliptical galaxy.

6: F is for first dog in space. THE FIRST DOG LAUNCHED INTO EARTH'S ORBIT WAS NAMEd LAIKIA. LAIKI WAS IN A ROCKET NAMED THE SPUTNIK 2.

7: G IS FOR GAVITY. GRAVITY IS THE FORCE IN SPACE THAT KEEPS OBJETS MOVING. WITHOUT GRAVITY SPACE WOULD BE STILL AND NOTHING WOULD MOVE.

8: H is for Hubble | Edwin Powell Hubble (November s Hubble's law, and helped establish that the universe is ex | Edwin Hubble was an American astronomer who profoundly changed our understanding of the universe by demonstrating the existence of galaxies other than our own,the Milky Way.

9: I is for Irregular | Irregular galaxies are galaxies that do not fit in any other class. They are irregular in shape. Irregular galaxies were once spiral & elliptical but deformed by disorders of gravitational pull. They were also created by lift over gas & dust.

10: J is for Jupiter. Jupiter is one of the largest planets in the solar system. Jupiter is also called a gas gaint , like the other three planets Saturn,Uranus, and Neptune.

12: L IS FOR LUNA | LUNA IS EARTHS MOON. IT PROVIDES LIGHT FOR THE EARTH AT NIGHT. THE MOON REVOLVES AROUND THE EARTH. THE MOON IS SOMETIMES GRAY WHITE OR YELLOW.

13: M is for mars | Mars is the 4th planet away from the sun. The planets nick name is the Red Planet. Many spacecrafts have visited Mars. The first space craft to touchdown on Mars was the Marriner 4.That space craft brought over 16,000 images of the planet back to earth.

14: Pluto is very small and unusual. Some scientist say that Pluto should be considered a large asteroid or comet- because it is not large enough to have it’s own satellite. However, because Pluto was classified as a planet, it will most likely remain so. | N is for not a real planet, many scientist believe that Pluto is not a real planet and shouldn’t be classified as a planet. Pluto’s moon Charon is bigger than Pluto, in size. | Pluto has 3 moons!!!! :)

15: Did you know every year the earth has completed its rotation around the sun. It takes the earth 365 days or 366 days on a leap year to complete its rotation. All the planets orbit around the sun. The closest to the sun is the planet that finishes its obit around the sun first. Earth is the third planet therefore it is the third planet to finish its rotation. | Is for orbit, the definition for orbit is to move or travel around in an orbital path. The earth finishes its rotation around the sun in 1 year.

16: P IS FOR PLANETARY MOTION. PLANETARY MOTION IS THE MOTION OF PLANETS AND OJECTS IN SPACE. PLANETARY MOTION WAS DISCOVED BY NEWTONS THIRD LAW OF MOTION.

17: Q is for quasars. Quasars are so far away that most quasars look like a single bright point in the sky. The word originally came from the word quasi-stellar radio source. Quasars where found during a radio emission. Scientist are trying to find out what makes the quasars radio loud or quite. The best telescope you can use to find a quasar is called an optical telescope.

18: R IS FOR ROCKET. ROCKETS HELP ASTRONOMERS AND SCIENTIST EXPLORE OUTER SPACE. ROCKETS USE THRUST TO GET UP OFF THE GROUND.

19: S is for Spirit Rover. The spirit rover is the first of two rovers of NASA's ongoing Mars exploration rover missions. It laded successfully on Mars on January 4, 2004. This was just three weeks before its twin Opportunity landed. | spirit rover | opportunity rover

20: T is for Terrestrial Planets. The Earth’s moon (our moon) has some of the same similarities as the terrestrial planets. The word Terrestrial planets came from the Latin word Terra. Terrestrial Planets are Planets that have hard, dense, and rocky like surfaces. The Terrestrial planets are Mercury, Venus, Earth, and Mars.

21: U is for the Universe. The universe is everything that is anywhere including the planets, stars, gas, dust and galaxies. The universe is really everything that exist which is all energy and matter.

22: V is for Venus | It is the second planet away from the sun. Venus is one of the most hottest and dangerous planets in the solar system. Venus clouds are made up of rain acid, this is the reason why Venus is a dangerous planet.

23: W is for Weather Satellite. Weather satellites are used to tell us what is the climate. Satellites can either hover or orbit at the same speed as the earth.

24: X is for x-ray telescope | The first X-ray telescope used in astronomy was to observe the Sun, the only X-ray source in the sky producing an abundance of measurable signal. The first X-ray picture of the Sun, by a rocket-borne telescope, was taken in 1963.

25: Y is for Y-Class Stars | Y- Class Stars a look like a brown dwarf. Y- Class Stars are not like your common stars M,O,B,K,L,F,and G.Y- Class Stars are also very hot stars.

26: z is for Zenith, the point right above the observers head. If you look up at the night sky you will see the zenith point above your head. The definition of zenith is the point on the celestial sphere vertically above a given position or observer.

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