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A galaxy contains stars, gas and dust. In a spiral galaxy like the Milky Way, the stars, gas, and dust are organized into a "bulge," a "disk" containing "spiral arms," and a "halo." Elliptical galaxies have a bulge-like central region and a halo, but do not have a disk.
Spiral galaxy has 3 basic components to its visible matter: the disk, the halo, and the nucleus or central bulge.
Smooth
A "spiral" galaxy.
what is the thin gas and clusters of stars surrounds the disk of the Milky Way Galaxy.
Spiral galaxy.
Most galaxies are shaped like a disk. It's the way they are formed. One of the most beautiful is the Sombrero Galaxy. [See related link for a picture]
are smooth and leve areas on an optical disk
The Earth is one of the planets in the Solar system, (the third from the Sun), which is one of the stars in the Milky Way Galaxy. This is a barred galaxy, with a central core of stars, and an extended disk continuing farther out in space. The Solar system is near the junction of these two components.
Through Milky way galaxy , most cosmic rays come from the Galaxy's disk.
The Earth is one of the planets in the Solar system, (the third from the Sun), which is one of the stars in the Milky Way Galaxy. This is a barred galaxy, with a central core of stars, and an extended disk continuing farther out in space. The Solar system is near the junction of these two components
The function of the central disk on the starfish is to regrow an appendage if one is cut off. It is where the arms of the starfish originate.