All Questions
1,007 questions
0
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Gyrochronology, the formula is empirical ?
The formula used in Gyrochronology that relates a star's Period of Rotation-Mass-Age is empirical?
This news How to Learn a Star’s True Age
"“A star’s rotation slows down
steadily with time, ...
- 2,665
5
votes
1
answer
256
views
Solar neutrino predictions
The solar neutrino problem has been "solved" by discovering that neutrinos have mass and they oscillate. So how accurate are now our predictions about the number and types of solar neutrinos that ...
- 1,260
4
votes
1
answer
3k
views
If Betelgeuse were to go supernova
If Betelgeuse were to go supernova would the sky be twice as bright, or day time extended, depending on what time of year it happened in.
Basically when it does supernova how bright and large will it ...
- 6,987
37
votes
6
answers
6k
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How many times has the matter in our Solar System been recycled from previous stars?
I've got a basic understanding of these facts:
The Universe is a little over 13 billion years old. Our Galaxy is almost that old.
Our Solar System is roughly 4.6 billion years old.
The heavier ...
- 473
4
votes
4
answers
1k
views
What happens if a black hole sucks up a massive amount of oxygen and hydrogen?
Suppose a black hole were to suck up a massive amount of surrounding oxygen and hydrogen. Would this ignite inside the black hole and turn it back into a star?
- 153
19
votes
4
answers
5k
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How long will the Universe's hydrogen reserves last for?
I recently became really interested in learning about physics and cosmology, but I still know very little. Hopefully someone with more knowledge will be able to shed some light on my questions.
Here ...
- 193
5
votes
2
answers
456
views
Exoplanet surface detail: Limitations on size of space telescope array
How big could an array of space telescopes acting as an interferometer be ?
How big would it have to be to resolve exoplanet surface detail the size of Iceland at a distance of 100 light years ?
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