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Supernovae, the Fate of our Sun, and the Distribution of Heavy Elements in the Earth
To answer your first question, I believe that the answer is yes, in that almost all of the nuclear…

Length and Brightness of Twilight
There is a really nice way to calculate and visualize the durations of twilight from any location, and specifically…

Will Our Solar System be Habitable When The Sun Becomes a Red Giant?
Possibly, but Earth will not be habitable. Details can be found in a very nice Phys.org article which describes…

What Does the Symbol for a Star’s Luminosity Mean?
The common symbol which refers to the luminosity of a star is called “solar luminosity”, indicated by an upper-case…

What is the Minimum Temperature Required to Fuse Hydrogen Atoms?
In order to fuse two hydrogen atoms two things are required: high temperature and high pressure. The minimum temperature…