Question

Which sequence of formation in our Galaxy by age is correct"", oldest to youngest? a) globular clusters, emission nebulae, open clusters b) Population I stars, Population II stars, Population III stars c) halo, spiral arms, globular clusters d) spiral arms, bulge, halo e) dark nebulae, planetary nebulae, emission nebulae"

Answer 1

Answer:

(e) dark nebulae, planetary nebulae, emission nebulae

Explanation:

here is the list of other from other options:

option A: globular clusters, open clusters, emission nebulae

option B: Population iii, Population ii, Population i

option C:  halo, globular cluster, spiral arms

option D: halo, bulge, spiral arm

N:B order from oldest to youngest.

Answer 2

Answer:

option E

Explanation:

Dark nebulae is the oldest and it's a form of intersteler cloud that absorbs numerous wavelength of light from stars it is said that stars are born behind it and widely believed that our star came from it and it about 4 billion years or more

Planetary nebulae is second to it and is formed from main sequence stars of between one and eight and it's about 40 million years

While emission nebulae is the youngest and us formed from ionized gases with numerous wavelength and us about 10million year.