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What would happen if Jupiter collided with the Sun? 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 this way is therefore sufficient to increase the angular momentum of the Sun by a significant amount In the long term this will have a drastic effect on the magnetic
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 the atmosphere, ground and objects The 32,000-100,000 lux figure is referring to a horizontal surface illuminated directly by the sun
What is the simplest way to prove that Earth orbits the Sun? 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 way we can get an estimate of the mass of the Sun We know from other tests that the Sun is more massive than the Earth, so therefore the Earth orbits the Sun
What is actually meant by sun set and sun rise times, when taking . . . 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 same size - so if we see 50% of the sun, the sun is 50% below the horizon So, I understand all this, so here is my question :
Why is the Sun approximated as a black body at ~ 5800 K? The sun is considered a black body, not only from the perspective of the Earth but from any perspective The sun's intensity spectrum is roughly the one of a perfect black body minus absorption by the sun's atmosphere and the Earth's atmosphere depending of where we measure the spectrum See the sunlight article on wikipedia
Why is the Sun almost perfectly spherical? - Physics Stack Exchange The Sun has had plenty of time to reach an equilibrium between its self gravity and its internal pressure gradient, the dynamical timescale for the Sun as a whole is only $\sim (GM_\odot R_{\odot}^3)^{-1 2} \simeq 1600$ s Any departure from symmetry would imply a difference in pressure in regions at a similar radius but different polar or
How hot can metal get in sunlight? - Physics Stack Exchange If the building is located in Hammerfest, Norway the metal might get warm to the touch If it's on the sun-facing side in Las Vegas you may find it gets hot enough to cause burns A definitive answer is not possible If people can touch it easily the temperature is a concern If it's out of reach, don't worry about it The iron isn't going to melt
sun - Why is sunlight spectrum continuous? - Physics Stack Exchange The continuous spectrum of the visible photosphere of the Sun is attributable to the radiative equilibrium of the $\mathrm{H}^{-}$ ion This has been recognised for at least 80 years ( Wildt 1939 ) This ion forms by the attachment of a free electron (with a continuous spectrum of energies) to a hydrogen atom, emitting a continuous spectrum of
How is distance between sun and earth calculated? 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 thats a different problem ;-)
astrophysics - Temperature on the surface of the sun calculated with . . . But in Gerthsen Kneser Vogel there is an exercise where Sherlock Holmes estimated the temperature of the sun only knowing the root of the fraction of D and R Lets say, he estimated this fraction to 225, so the square root is about 15, how does he come to 6000 K ?