Essay on Our Universe: Definition, Stars and Solar System.
Question: Compare and contrast spiral and elliptical galaxies. Spectacular Space. A galaxy is comprised of dark matter, dust, gas, stars, and star remnants that are bound by gravity.
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.
Galaxies in the Universe: An Introduction Galaxies are the places where gas turns into luminous stars, powered by nuclear. 5 Spiral and S0 galaxies 191 5.1 The distribution of starlight 192 5.2 Observing the gas 206 5.3 Gas motions and the masses of disk galaxies 214.
Spiral galaxies have arms spiraling out from the central bulge of the galaxy and contain newer stars and has more gasses to form new stars. Elliptical galaxies are normally formed after spiral galaxies merge. The formation is an elliptical mass of stars without any arms. When galaxies merge, the process destroys gasses needed to form new stars.
Open the Rotation Curve of a Spiral Galaxy animation and click at various distances from the galactic center to create a graph of the galaxy's rotation curve; be sure to start with points very close to the galactic center and continue to well beyond the visible part of the galaxy.
The Pinwheel galaxy is a spiral galaxy A galaxy is a group of many stars, with gas, dust, and dark matter. The name 'galaxy' is taken from the Greek word galaxia meaning milky, a reference to our own galaxy, the Milky Way. Gravity holds galaxies together against the general expansion of the universe.
There are spiral, elliptical, and irregularly shaped galaxies. Galaxies contain anywhere from 100,000 to 3,000,000,000,000 stars. There are three major types of galaxies: spiral (with arms), elliptical (no arm), and irregular (without rotational symmetry). Galaxies radiate a continuous spectrum of energy.