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Astronomy Questions and Answers (Q&A)

Why did the solar nebula heat up as it collapsed?
Moonshark
Answered: Apr 24, 2024
As the cloud shrank, its gravitational potential energy was converted to thermal energy.

1 Answer

304 views
How can an electron in an atom lose energy to go from a higher energy level to a lower energy level?
Moonshark
Answered: Apr 24, 2024
It releases a photon equal in energy to its own energy drop.

1 Answer

301 views
What is the main factor that drives Darwinian evolution?
Lhyedsisa
Answered: Apr 24, 2024
The competition for finite resources

1 Answer

298 views
What would happen if Uranus was much brighter in the sky and would be visible to the naked eye as Jupiter or Saturn?
John Smith
Answered: Apr 24, 2024
A week would have eight days instead of seven.

1 Answer

296 views
Will our Sun ever undergo a white dwarf supernova explosion? Why or why not?
Carostrum
Answered: Apr 24, 2024
No, because it is not orbited by another star

1 Answer

294 views
What do we mean by the main-sequence turnoff point of a star cluster, and what does it tell us?
Saii
Answered: Apr 24, 2024
It is the spectral type of the hottest main sequence star in a star cluster, and it tells us the cluster s age.

1 Answer

288 views
Why is Newton's version of Kepler's third law so useful to astronomers? [Hint]
Wyatt Williams
Answered: Apr 24, 2024
It can be used to determine the masses of many distant objects.

1 Answer

282 views
Who first suggested that the earth rotated on its axis?
Webvoyager
Answered: Apr 24, 2024
Aristarchus

1 Answer

272 views
What is the distance that light travels in a year called?
Orion thames
Answered: Apr 24, 2024
Light Year

1 Answer

269 views
What are the two geological features that appear to set Earth apart from all the other terrestrial worlds?
Wyatt Williams
Answered: Apr 24, 2024
Plate tectonics and widespread erosion

1 Answer

263 views
Is sun a ball of plasma?
Isotonic.yell
Answered: Apr 24, 2024
The Sun consists of gas in which many or most of the atoms are ionized (missing electrons)

1 Answer

258 views
How many helium nuclei fuse together when making carbon?
Moonshark
Answered: Apr 24, 2024
3

1 Answer

256 views
How long does it take Mercury to rotate on its axis?
Alfred Hook
Answered: Apr 24, 2024
58.7 Earth Days

1 Answer

239 views
Why does the Moon have a layer of powdery "soil" on its surface?
Wyatt Williams
Answered: Apr 24, 2024
It is the result of countless tiny impacts by small particles striking the Moon.

1 Answer

234 views
How many rings does the planet Saturn have?
Cambron bill
Answered: Apr 24, 2024
7

1 Answer

227 views

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