How much lux does the Sun emit? - Physics Stack Exchange
When you look 'at the world' (i.e. to the horizon) on a clear day, unlesss the sun is at a very low angle, the surface of your eye is not illuminated directly by the sun, only reflected sunlight from …
What is the simplest way to prove that Earth orbits the Sun?
Apr 17, 2015 · If we assume the Sun orbits the Earth, the math says that the Sun should be much less massive than the Earth. If we assume the Earth orbits the Sun, the opposite is true. Either …
How is distance between sun and earth calculated?
Apr 27, 2015 · Another way of calculating the earth - sun distance is to look at the centrifugal and the gravitational force. This solution assumes that one already knows the mass of the sun, but …
sun - Nuclear fusion - Hydrogen isotopes - Physics Stack Exchange
Dec 15, 2014 · The main fusion reaction in the sun is the proton-proton chain reaction, which takes six protons and produces two protons, one alpha particle, two anti-electrons, and two …
What would happen if Jupiter collided with the Sun?
Apr 27, 2018 · However, the Sun will accrete $\sim 10^{42}\ \mathrm{kg\ m^2\ s^{-1}}$ of angular momentum, which is comparable to its current angular momentum. The accretion of Jupiter in …
Why doesn't sun go all the way to the horizon during sunset?
Apr 14, 2023 · However, there may be an illusion where sun's position at horizon may appear slightly different than it actually is due to atmospheric refraction. It may be useful to read this. …
Why does the Sun appear larger during the sunrise and sunset?
Jul 22, 2017 · The moon or the sun on the other hand do not appear noticeably smaller, because their real distance does not change much when they move to the horizon. But the brain would …
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How much iron would I have to shoot into the Sun to blow it up?
The sun's temperature at the surface is ~5778 Kelvin which is much higher than the boiling point of Fe, Ni, or any alloy of the Fe-Ni. The atoms would disperse and would become lost in the …
What is actually meant by 'sun set' and 'sun rise' times, when …
Feb 15, 2017 · The Sun has actually set/risen and we see it due to the way light is bent across the atmosphere. Apparently due to coincidence of the size and distance of the sun, its exactly the …