Question

what evidence suggests that the protogalactic cloud that formed the milky way resulted from several collisions among smaller clouds?

Answer 1

The fact that the age and heavy element content of halo stars vary but do not appear to be correlated with the stars' distance from the galactic center indicates that the protogalactic cloud that gave rise to the Milky Way was the product of multiple collisions between smaller clouds .

How is it an indicating element?

1. It makes plausible to think that the protogalactic cloud that gave birth to our Galaxy was nearly spherical given that the oldest stars, those in the halo and in globular clusters, are spread in a sphere of galaxy.
2. Since the oldest stars in the halo are between 12 and 13 billion years old, we infer that the Galaxy first formed about that time.
3. Other proof that galaxies in general started forming a bit more than 13 billion years ago can be found in the chapter on The Big Bang.
4. The protogalactic cloud eventually condensed and created a thin revolving disk, much like in the case of star formation.
5. Stars born before the cloud disintegrated did not take part in the disintegration, but have continued to orbit in the halo to the present day.
6. Gas in the thin disk was broken up by gravitational forces into clouds or clumps with masses akin to star clusters.
7. Later, these distinct clouds broke up even further to create stars.
8. Due to the fact that the oldest stars in the disk are almost as old as the youngest stars in the halo, the collapse must have occurred quickly from an astronomical perspective, possibly taking only a few hundred million years.

What are halo stars?

The galaxy's outermost points, or halo stars, are simply regions where the imperium cannot spread since the astronomical's light does not shine. Several xenos races that the imperium has never encountered essentially make up its population.

Can learn more about halo stars from https://brainly.com/question/3618461

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