Eliptical Galaxies
why do eliptical galaxies appear to be so bright at core...
and also spiral?
The short answer is that there are lots of stars at the core. Also, the core of a galaxy is a place of active star birth. Some of the stars born are really big, and explode as supernovae. So it's also a place of active star death. All this activity makes the gas and dust glow too. And if the black hole is in the process of being fed lots of gas and dust and stars, very bright jets are emitted out the poles.
Shell Formation; Collision of Two Elliptical Galaxies
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Galaxies $36.38 A brief history of astronomy explains the Milky Way`s place in the universe and the Earth`s place within the Milky Way, and describes the different kinds of galaxies. |