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 …
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 …
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 …
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 …
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 …
optics - If the sea surface were absolutely calm should the Sun ...
Jan 18, 2021 · As the elevation of the Sun decreases and it moves from the zenith to the horizon, the glitter becomes more and more elliptical, until it becomes a ribbon as in your image. On …
newtonian mechanics - How come the Sun's gravity can hold …
Nov 29, 2016 · The Sun is keeping you close. After all, you are orbiting it just like the Earth. You don't fly off into space because the Earth and you experience the same acceleration due to the …
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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Equation of Earth's Orbit around Sun (ellipse)
The sun is one of the two foci. For the Earth, the perihelion is 147.1 million km and the aphelion is 152.1 million km. These two distances help identify the location of the sun on the major axis of …