Closet by galaxies

The nearest galaxies to the Milky Way are easily seen with an amateur telescope.  Like Andromeda and the Magellan Clouds can be seen with the naked eye. Approximately the Milky Way dwarf galaxies orbiting some. In 1994 the discovery of the SagDEG (Sagittarius Dwarf Elliptical Galaxy) to 88,000 lights years away, and in 2003 the Canes Major galaxy at 25,000 light years. Are the two closest so far discovered?

Every galaxy has a black hole

Every galaxy has black holes at their center. While the black hole is active, traps and swallows all matter around it, like a whirlpool. When he is not able to swallow again, the matter continues to revolve around him, but not within. The galaxies whose black hole is still active called active galaxies.

Active galaxies are famous by their shape and the large whole of radiation they emanate. The black hole core is surrounded by a bright disc of matter, dust and hot gas. It is called the accretion disk, and spirals while emitting high energy radiation. Since the poles, the black hole space launches huge jets of particles, which can measure thousands of light years in length. The Milky Way galaxy was also active in the past.

Variety of Galaxies

Using by powerful telescopes, in most galaxies only detected mixed light of all the stars, but show the closest individual stars. Galaxies come in a variety of ways. In 1930 Hubble classified galaxies into elliptical, spirals and irregulars, the first two being the most frequent.

Elliptical galaxies

Some galaxies have a globular shape, with a bright nucleus. They called ellipticals, contain a large population of old stars, usually little gas and dust,and some newly formed stars. Elliptical galaxies have a variety of sizes,

What type of Galaxies in the Universe?

There are hundreds of billions Galaxies are huge collections of stars, gas and dust in the universe .Each galaxy may consist of hundreds of billions of stars and other heavenly bodies. In the center of galaxies is where stars are more concentrated. Each body of a galaxy is moving because of the attraction of others. In general there is also a broader movement that makes everything turn around the center together

At the edge of the visible universe

At the edge of the visible universe almost the farthest galaxies are more than 13,000 million light years away. Their light has taken that long to reach us. This means that as we were more than 13,000 million years, only 500 million years after the Big Bang. Therefore, more distant galaxies are also the oldest in the Universe. The most distant galaxy discovered to date is the Abell 1835 IR1916. It is located behind the cluster Abell 1835, in the constellation Virgo. It was discovered in the year 2007 by European scientists. This is 13,200 million light years away and each time more.

Structures of galaxies Clusters

In the universe Galaxy clusters are huge structures. Galaxies emit a lot of gravity. These causes nearby galaxies attract each other and are merged to form clusters. Our galaxy, the Milky Way, is part of a small cluster called the Local Group . Within a cluster, galaxies rotate around each other, and even frequently collide. The size and mass of the cluster galaxies varies with the form, but the distance between one end and another is always several million light years.

Enormous catalogs

Through the ceiling catalogs are lists of deep sky objects that occupy a fixed position in the sky. They are very useful for amateur astronomers, because they collect the main galaxies, nebulae and star clusters that can be seen with a telescope medium.

In the best known are: Messier catalog: the most famous and the first to be published. He was drafted by the French astronomer Charles Messier in 1769. It brings together 110 objects numbered M1 to M110, in the order in which the Messier discovered while watching the skies for comets.