Tag Archives: unsolved

Unsolved: Why is the Sun so hot?

The corona of the Sun is a layer of plasma that extends millions of kilo­metres into space above the Sun’s surface. The problem is that the tem­per­ature of the corona is between one and three million kelvin, whilst the tem­per­ature of … Continue reading

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Unsolved: Dark Matter and Dark Energy

The graph below shows the com­pos­i­tion of the entire Universe. That tiny 4% yellow slice? That’s all the baryons, elec­trons, gluons, leptons, mesons, muons, neut­rinos, neutrons, photons, protons, quarks, tau particles and W/Z bosons that we know of. Everything else in … Continue reading

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