Hubble Space Telescope, NASA, Galaxy, Spiral galaxy Cosmic tour: Galaxies NGC4680, M51
Ngc 4680 ngc 4680 enjoyed a wave of attention in 1997 as it played host to a supernova explosion known as sn 1990. Bp, Music, australian, amateur astronomer. Robert evans identified the supernova and has identified an extraordinary 42 supernova explosions. Ngc 4680 is actually a rather tricky galaxy to classify. It is sometimes referred to as a spiral galaxy, but it is also sometimes classified as a lenticular galaxy lenticular galaxies fall somewhere in between spiral, galaxies and elliptical galaxies, while ngc 4680 does have distinguishable spiral, arms they are not clearly defined and the tip of one arm Appears very diffuse galaxies are not static and their morphologies and therefore their classifications vary throughout their lifetimes spiral. Galaxies are thought to evolve into elliptical galaxies, most likely by merging with one another causing them to lose their distinctive spiral, structures, Music, the graceful, winding arms of the majestic spiral. Galaxy m51 ngc 5194 appear like a grand spiral, staircase weeping through space. They are actually long lanes of stars and gas laced with dust. This sharpest ever image taken in january 2005, with the advanced camera for surveys aboard the nasa esa hubble space telescope, illustrates a spiral galaxys grand design from its curving spiral, arms where young stars reside to its yellowish central core, a home of older stars. The galaxy is nicknamed the whirlpool because of its swirling structure. The whirlpools most striking feature is its two curving arms, a hallmark of so called grand designed spiral.
Galaxies many spiral galaxies possess. Numerous loosely shaped arms that make their spiral structure less pronounced. These arms serve an important purpose in spiral galaxies. They are star formation factories, compressing hydrogen gas and creating clusters of new stars in the whirlpool. The assembly line begins with the dark clouds of gas on the inner edge. Then moves to bright, pink, star, forming regions and ends with the brilliant blue star clusters along the outer edge. Some astronomers believe that the whirlpools arms are so prominent because of the effects of a close encounter with ngc 5195. The small yellowish galaxy at the outermost tip of one of the whirlpools arms. At first glance, the compact galaxy appears to be tugging on the arm. Hubbles clear view, however, shows that ngc 5195 is passing behind the whirlpool. The small galaxy has been gliding past the whirlpool for hundreds of millions of years as ngc 5195 drifts by its gravitational muscle pumps up waves within the whirlpools pancake shaped disc. The waves are like ripples in the pond generated when a rock is thrown in the water. When the waves pass through orbiting gas clouds within the disk, they squeeze the gaseous material along each arms inner edge. The dark, dusty material looks like gathering storm clouds. These dense clouds collapse creating a wake of starburst, as seen in the bright pink star forming regions. The largest stars eventually sweep away the dusty cocoons with a torrent of radiation hurricane, like stellar, winds and shock waves from supernova blasts, bright, blue star clusters emerge from the mayhem illuminating the whirlpools arms like city street lights.