How+many+galaxies+exist?

__Hubble space telescope__ The hubble telescope is a space telescope that was made in 1990 and still remain in space. In the first 15 years it was in space it took over 700,000 pictures. Hubble is a telescope that orbits earth. Hubble is one of Nasa's most successful and longlasting science missions. Hubble's discoveries has changed scientists mind about the galaxy and how it looks. The hubble telescope has revealed the real age of the galaxy it is about 13 to 14 billion years old. Hubble played a key role in the discovery of dark energy, a mysterious force that causes the expansion of the universe to increase. The amount of astronamy based on hubble observations has helped make it one of history's most important observatories. Nasa named the world's first space telescope after an american astronomer edwin.p hubble [1889-1953]. Scientists began dreaming of such a telescope in the 1940s, but it took more than four decades for those dreams to become reality with the Hubble Space Telescope. The hubble telescope completes one orbit around the earth every 96 minutes. It takes about approximately 5 miles per second. The hubble telescope was built so we can get pictures of the galaxy, andalso the hubble telescope was built to figure how planets funtion and also it can take pictures of the sun or moon so we can figure out about natural disasters and how they happen, and how to help with there impacts on earth.

sites we used for the hubble telescope info, pictures, and videos: [] [|http://hubblesite.org/gallery/albu] [|http://www.bigislandvideonews.com/2011/04/13/suprisingly-young-galaxy-found-by-keck-nasa] [|m/entire/pr201][|2006a/] media type="youtube" key="X5zVlEywGZg" height="188" width="257"

__HOW MANY GALAXIES ARE THERE IN THE OBSERVABLE UNIVERSE?__ The Hubble Telescope has discovered over 50 billion galaxies that are visible today. Our local gruop has about thirty galaxies, only about 5 galaxies are visible from the Hubble Space Telescope. We have to multiply 40 billion by maybe 6 for those smaller galaxies. That means the estimate might be about 240 billion galaxies in our visible galaxy. But that doesnt mean it's true that there are that much galaxies, scientists are not sure how much galaxies there are. Below, is a picture that shows the hubble ultra deep field it is a field full of galaxies. In our galaxy, there are about between 100-300 billion stars in the milky way. http://www.universetoday.com/36610/how-many-galaxies-have-we-discovered/ media type="youtube" key="SpkrVw_E6Nw" height="182" width="247" align="left"media type="youtube" key="upXTZE57Z5U" height="182" width="247" [] []

Here is a picture of the hubble ultra deep field. __what are galaxies?__ Galaxies are a system of millions and billion of stars, together with gas and dust, held together by gravitational attraction. There are hundreds of billions of galaxies in the universe. Galaxies always come i different sizes, shapes, and brightness. Galaxies are divided into 3 basic types: spirals, ellipticals, and irregulars. The galaxy of which the solar system is a part:the milky way. A spiral galaxies look likes spirals, with long arms winding toward a bright bulge at the center. Ellipticals are named after there shape. Ellipticals galaxies are circular, long, narrow, and cigar shaped. Irregular galaxies are usually found in clusters, where collisions between galaxies are common.

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__how did galaxies start?__

Galaxies started to form about 750 billion years ago. Galaxies are not scattered randomly thorughout the universe, but are found in clusters. There was the big bang, known as the sudden explosion. That explosion brought space and time, matter and energy. Several thousand years later thereafter, the universe was to hot to form things. When the universe cooled at a point, the fist hydrogen and helium atoms begin to form. When astronomers study more about the milky way, the learned about it's birth, life, and death. galaxies started to form over 14 billion years ago. Scientists believe that our galaxy started from a sudden explosion, known as the big bang. [] []

__awesome space facts__ -In the middle of a galaxy is A black hole that weighs about 3 million suns, it doesn't glow but the gas circulating it glows. The glowing around the black hole is maybe stars that are attracted to the black hole. - Galaxies are a huge group of single stars, star clusters, star systems, dust and gas bound together by gravity.

-galaxies are a huge group of single stars, star clusters, star systems, dust and gas

-The Milky Way has a halo of dark matter that makes up over 90% of its mass.

-every pictures you've seen of the milky way from above is either another galaxy or an artist's imagination

-there is a black hole at the center.

**__Our top 5 we__** **__galaxies__** **__think is the most popular__**
 * -**Any stars that you can see in the night sky without the aid of a telescope are part of the Milky Way.

__sombrero galaxy__ The white core of the circled by thick dust lanes in this spiral galaxy. The galaxy is surrounded by a halo of stars, dust and gas that indicate it may actually be an __ [|elliptical galaxy] __. As with our own Milky Way, astronomers have detected a supermassive black hole at the heart of the Sombrero Galaxy. Based on the speed of the stars orbiting around it, astronomers have calculated that it must have a mass of at least 1 billion suns. This is one of the most massive black holes detected in nearby galaxies.Astronomers have detected that it mostly contains hydrogen gas and dust. []

__the milky way__

The milky way is a spiral galaxy.Like other spiral galaxies, the Milky Way has a bulge, a disk, and a halo. Although all are parts of the same galaxy, each contains different objects. The halo and central bulge contain old stars and the disk is filled with gas, dust, and young stars. Our Sun is itself a fairly young star at only 5 billion years old. The Milky Way galaxy is at least 5 billion years older than that.Our solar system is located in the outer reaches of the Milky Way Galaxy, which is a spiral galaxy. The Milky Way Galaxy contains roughly 200 billion stars. Most of these stars are not visible from Earth. Almost everything that we can see in the sky belongs to the Milky Way Galaxy.Since we're inside the Milky Way Galaxy and we've never sent a spacecraft outside our Galaxy, we have no photographs of the Milky Way Galaxy.

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__black eye__ The Black Eye Galaxy, also known as the Sleeping Beauty Galaxy, is a __spiral galaxy__in the constellation of Coma Berenices. It is approximately 17 million light years away.The Black-Eye Galaxy is unusual in that the galaxy has a dark dust cloud in the region of the central nucleus, bordering the entire north and east side of the oval central mass. This dust cloud is the feature from which the galaxy derives its name as the "Black-Eye" galaxy. This galaxy is the result of a collusion between a large galaxy and a small galaxy. The outer regions of the Blackeye Galaxy rotate one direction while the inner regions rotate the opposite way.

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__whirlpool__

The graceful, winding arms of the majestic spiral galaxy appear like a grand spiral staircase sweeping through space.But they are actually long lanes of stars and gas laced with dust.Astronomers have calculated that the Whirlpool Galaxy measures about 38,000 light-years across, with a mass of about 160 million times the mass of [|the Sun]. This makes the galaxy smaller and less massive than our own Milky Way. __hoag's galaxy__ art hoag discovered this odd ringed shaped galaxy in 1950. On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder stars that are likely much older. Between the two is a gapthat appears almost completely dark.How [|Hoag's Object] formed remains unknown, although similar objects have now been identified and collectively labeled as a form of ring galaxy.

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__our opinion.....__ Our opinion about how many galaxies exist is alot. Nobody can keep count about how many galaxies exist there are billion of billion of galaxies. The galaxies that exist today are small galaxies and they are in the milky way and astronomers are not really sure how the milky way looks, the pictures you see in books are not really the milky way they are an artist's imagination or some other galaxy. I think we researched alot about this question and even though i read alot of information i cant answer my own question.