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Why $\rm He^{++}$ is more opaque than $\rm He^{+}$ and so absorbs more energy?
In the Cepheids, $\rm He^{++}$ is more opaque than $\rm He^{+}$ so it absorbs more energy.
If it is because a more charged particle have a higher electromagnetic field and the stronger the field, the ...
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2
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Would it be possible to detect nuclear explosion on exoplanet?
How strong would have to be nuclear explosion on exo-planet that orbits some other star for it to be detectable outside of that system.
Or it would be impossible due to amount of radiation coming from ...
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