What type of galaxy contains mostly young stars?

Answer 1

The age of an individual star can vary; they were all made at different times and have different life spans. Stars can range from a few million to a several billion years old. The oldest star yet discovered, HE 1523-0901, is an estimated 13.2 billion years old.

Answer 2

Varies between galaxies. Our spiral galaxy is medium sized, whereas there are small spirals, big spirals and absolutely gigantic spirals too.

Same goes with elliptical and irregular galaxies.

Answer 3

The part of the Milky Way Galaxy that has the most amount of stars is the center. Most of these stars are Yellow, Orange, and Red stars, which are old, whereas in the spiral arms in the outside of the galaxy are mostly White and Blue, which are newer stars.

Answer 4

The oldest stars in the Milky Way (and the Universe) are population III stars [See related question] (However, none have been observed) so the oldest type observed are population II stars.

See related question for the oldest star known.

Red dwarfs are probably the oldest types as they have a very long lifetime - hundreds of billions of years. So any red dwarf created would still exist today.

Answer 5

Older stars are usually found in old galaxies. The older they are the higher the influence of black hole in the middle. For example our galaxy is quite young and our black hole is not very big.

Answer 6

The oldest living stars in the milky way are found in halo. The oldest living stars and 146 Gloubular Clusters make up the halo. These stars are believed the be the between the ages 10-15 billion years old. Halo is underneath the disk.

Answer 7

Many new stars are constantly being formed (in the spiral arms particularly) in "Spiral Galaxies", like our own.

Also, there are "Starburst Galaxies" with especially intense star formation. These can occur when galaxies "collide", compressing their clouds of gas, resulting in a lot of new star formation.

Answer 8

Elliptical galaxies typically have relatively little interstellar matter. Because of this, they also have a low portion of open clusters and a low rate of new star formation.

Instead the galaxy is dominated by generally older, more evolved stars that are orbiting the common centre of gravity in random directions.

Answer 9

Elliptical galaxies contain mainly old stars.

Answer 10

The giant star, HE0107-5240 is the oldest star in our Milky Way. It could date back to the beginning of the Universe, about 14 billion years ago.