Both structures contain huge numbers of stars.
They are in space. (: you're welcome.
Spiral galaxies, barred spiral galaxies, elliptical galaxies, and irregular galaxies
spiral, eliptical, cartwheel, barred spiral, and lenticular galaxies
Eliptical galaxies have older stars than spirals and elipticals are oval-shaped.
The bar.
While spiral galaxies are bright, elliptical galaxies are dim. Spiral galaxies are hotbeds of star formation, but elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born
Yes, lenticular galaxies are lens-shaped. They will not have spiral arms.
Spiral galaxies get their beautiful structure from tidal interactions between galaxies.
Approximately 60% of all galaxies are spiral
It's not known to any degree of accuracy, but about 66% of all spiral galaxies are barred and about 60% of galaxies in the local Universe are spiral galaxies.
Yes. There are two types of spiral galaxies: "S" (normal spiral) and the less common "SB" (barred spiral, with an elongated center).
spiral galaxies (ours), irregular galaxies, and elliptical galaxies.
galaxie 1, 2, 3, 4 and 5