10 Galaksi Terindah di Alam Semesta

Friday, June 22, 2012 | comments

The galaxy is a system bound by gravitational forces are composed of stars (with all forms of manifestations, such as neutron stars and black holes), gas and cosmic dust interstellar medium, and the possibility of a hypothetical substance known as dark matter. The word galaxy comes from the Greek Galaxias, which means "milk," which refers to the Milky Way (English: Milky Way). Types of galaxies ranging from dwarf galaxies with ten million (107) stars up to giants with one trillion galaxies (1012) stars, all orbiting the galactic center. The sun is one of the stars in the Milky Way; solar system including the earth and all the objects that orbit the Sun.

There might be more than 100 billion (1011) galaxies in the observable universe. Most of the galaxies in diameter and 1000 to 100,000 PARSEC are usually separated by a distance which is calculated in millions of PARSEC (or megaparsec).

Here are the most beautiful galaxies in the universe:

1. The Sombrero Galaxy

Sombrero galaxy (also known as M104 or NGC 4594) is a spiral galaxy in the constellation Virgo. M104 is the main galaxies in the galaxy M104. Of Earth's galaxy looks like a sombrero hat. Discovered in the late 1700s, most likely by Pierre Méchain, who called it a discovery in a letter dated May 6, 1783. M104 also independently discovered by William Herschel on May 9, 1784.

2. Black Eye Galaxy

Spiral galaxy in the constellation Coma Berenices, Messier 64, the famous "Black Eye" galaxy or "Sleeping Beauty galaxy," has a spectacular dark band of absorbing dust in front of the bright galactic nuclei. It is well known among amateur astronomers because of appearance in small telescopes.

3. 2MASX J00482185-2507365 occulting pair

The 2MASX J00482185-2507365 occulting pair is a pair of overlapping spiral galaxies found around NGC 253, a sculptor Galaxy. Both galaxies are more distant than NGC 253, with a background galaxy, J00482185-2507365 2MASX, located at redshift z = 0.06, and the foreground galaxy NGC lying between 253 and background galaxies (0.0008 <z <0.06 ). This pair of galaxies beyond the present distribution of galactic dust visible from the spiral arms of galaxies. Now where the unexpected from the starry dust of weapons beyond the limit, a new study suggests areas for extragalactic astronomy. The dusty arms extend 6 times from starry arms of the galaxy, and will appear in the HST image silhouetted against the back of the center and core of the galaxy.

4. The Whirlpool Galaxy

Also known as Messier 51a, M51a, or NGC 5194, the Whirlpool Galaxy is the interaction of grand-design spiral galaxy located at a distance of about 23 million light-years away in the constellation Canes Venatici. He is one of the most famous of spiral galaxies in the sky. The galaxy and the companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars. Whirlpool Galaxy is also a popular target for professional astronomers, who study to better understand galaxy structure (particularly in relation to the structure of spiral arms) and galaxy interactions.

5. Grand spiral galaxy
Also known as NGC 123, is attracting millions of galaxies dominated by bright stars and dark dust, caught on a gravitational spiral arm circumference of rotating about the center. Open the group containing bright blue stars can be seen sprinkled along these spiral arms, while dark lanes of dust across the solid can be seen sprinkled between them. Less visible, but detectable, are billions of dim normal stars and vast tracts of inter gas, together wielding such high mass that dominates the dynamics of galactic nuclei. Looks even bigger in terms of the number of forms we do not yet know - pervasive dark things are needed to explain the movement that looks beyond the galaxy.

6. Supernova 1987A

Two decades ago, astronomers spotted a bright exploding stars in more than 400 years: a dead star, called Supernova 1987A. This picture shows the whole area around the supernova. The most prominent feature in the image is a ring with dozens of bright spots. A shock wave of material unleashed by the famous explosion is slamming into regions along the ring from the inner regions, heating them and causing them to glow. The ring, about one light year across, maybe the cage with the stars about 20,000 years before it exploded. In recent years, the entire ring will absorb all the flames because the crash forces. Glowing ring is expected to be bright enough to illuminate the star of the environment, providing astronomers with new information about how stars were expelled material before the explosion. Photo taken in December 2006 with Hubble's Advanced Camera for Surveys of. (Credit: NASA, ESA, and R. Kirshner: Harvard-Smithsonian Center for Astrophysics) 

7. Galaxy NGC 1512
Blocking some of the spiral galaxy located 30 million light-years away toward the constellation Horologium, Galaxy NGC 1512 is bright enough to be seen with amateur telescopes. The galaxy is 70,000 light years across, which is almost as large as our own Milky Way galaxy. The core of the galaxy is remarkable for the "circumnuclear" starburst ring, which is a circle of young stars of the group that spans several light-years away in 2400. Galaxy "starbursts" strong episode of star formation and the newly discovered galaxies in various environments.

8. Galaxy NGC 3370

Dusty spiral galaxy is located some 98 million light-years away toward the constellation Leo, the center of NGC 3370 also shows dust lanes delineated and defined core excruciating pain. This view of NGC 3370 have been taken by the Hubble Space Telescope using the Advanced Camera for surveys and sharp enough to identify individual Cepheid variable stars in the galaxy. Cepheid variable stars used to make the extragalactic distance. In 1994, a type sypernova He burst in NGC 3370. (Credit: NASA, The Hubble Heritage Team and A. Riess; STScI) 

9. M81
A large and beautiful spiral galaxy M81, in the northern constellation Ursa Major, is one of the galaxy looks smart on the planet earth from the sky. This superbly detailed view stating bright nucleus, grand spiral arms and sweeping cosmic dust lanes compared with the scale of the Milky Way. Hinting chaotic in the past, a remarkable dust lane running straight through the disk, below and right of galactic center, contrary to the M81 spiral prominence of other features. Dust lane may be worth lingering result of close encounter between M81 and smaller companion galaxy, M82. Disclosure of variable stars in M81 (aka NGC 3031) has produced one of the best to determine the distance of external galaxy - 11.8 million light years.

10. Hoag's Object

A non-typical of the type of galaxy known as a ring galaxy, Hoag's Object display has attracted as many amateur astronomers have a remarkable structure of professional admiration. This galaxy is one or two? This question came to light in 1950 when astronomer Art Hoag chanced upon this unusual extragalactic object. Outside the ring dominated by bright blue stars, while near the center which is located away from the ball redder stars are probably older. Between the two is a distinction that appears almost completely dark. How Hoag of Object formed remains unknown, although similar objects have been identified and collectively labeled as a form of ring galaxies. Genesis hypotheses include galaxy collision billions years ago and perturbative gravitational interactions involving an unusually shaped core. Above photos taken by the Hubble Space Telescope in July 2001 an unprecedented details of Hoag states of objects and can produce a better understanding. Hoag Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of Serpens. Coincidentally, visible in the cliff yet another ring galaxy that likely lies in the distance.

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