Which type of galaxy has the least amount of star formation?

elliptical galaxies
Star formation In spirals, this blue color emanates largely from the young, hot stars in their spiral arms. Very little star formation is thought to occur in elliptical galaxies, because of their lack of gas compared to spiral or irregular galaxies.

Which type of galaxy is the least common?

Around two-thirds of all spiral galaxies have a bar-like structure – thus they are classified as barred spiral galaxies. Our galaxy, the Milky Way is an example of this type of galaxy. The rarest type of galaxies is the elliptical double-ringed galaxy.

Which galaxies are the smallest?

Scientists at the University of California at Irvine have discovered a galaxy so small that it barely even qualifies as a galaxy. Deemed “Segue 2,” the dwarf galaxy only contains about 1,000 stars and is the least massive galaxy in the known universe, reports Phys.org.

Which type of galaxy is likely to contain only O type stars?

Spiral arms O-type main-sequence stars tend to appear in the arms of spiral galaxies.

What galaxy type contains only old stars?

Elliptical galaxies
Elliptical galaxies consist almost entirely of old stars and have shapes that are spheres or ellipsoids (somewhat squashed spheres) (Figure 4). They contain no trace of spiral arms. Their light is dominated by older reddish stars (the population II stars discussed in The Milky Way Galaxy).

What type of galaxy has the oldest stars?

The Milky Way’s bulge — a bulbous, 10,000 light-year-wide region of stars and dust popping out of the galaxy’s spiral disc — is thought to contain some of the oldest stars in the galaxy.

Which type of galaxy forms the most stars?

Elliptical galaxies are the most abundant type of galaxies found in the universe but because of their age and dim qualities, they’re frequently outshone by younger, brighter collections of stars. Elliptical galaxies lack the swirling arms of their more well-known siblings, spiral galaxies.

How many stars does the smallest galaxy have?

Can O type stars have planets?

While they’re easy to spot in the night sky, O-type stars like Zeta Ophiuchi are the most rare. We haven’t yet found any planets orbiting one. Planets that do exist likely have been stripped of their atmospheres by these stars’ strong ultraviolet light.

Which type of galaxy typically contains the least relative amount of gas and dust?

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. The existing stars inside an elliptical galaxy tend to be older, giving off more red light than younger stars.

Do galaxies contain relatively few stars?

Nothing, because the spaces between stellar systems in a galaxy is much larger than their size. What type of radiation does dark matter emit?

What are the smallest galaxies called?

The smallest independent structures known today are Segue 1 and Segue 3. Only approximately 1000 stars are present in the entirety of dwarf galaxies Segue 1 and Segue 3,… [+]

Where do new stars form in spiral galaxies?

Where do new stars form in galaxies? An optical image of the spiral galaxy NGC 300 with molecular clouds shown in blue. An analysis of star formation in these clouds show that the first stars that form quickly disperse the cloud, stifling further star formation.

Is there a limit to the number of stars in a galaxy?

If you ask about a general limit for how large a galaxy can grow, given enough time, then there are no practical limits. But it’s not so much about the number of stars, but about the total mass.

What does the color of the Stars in an elliptical galaxy indicate?

• Red-yellow color indicates older star population. • Elliptical galaxies are much more common in huge clustersof galaxies (hundreds to thousands of galaxies).

Are elliptical galaxies more common in large clusters of galaxies?

• Elliptical galaxies are much more common in huge clustersof galaxies (hundreds to thousands of galaxies). • Nearby galaxies tend not to be irregular, distant galaxies are frequently irregular. • Must be powered by accretion of mass onto massive black holes?