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How is distance between sun and earth calculated? Do you want to know both how the Earth-sun distance is measured and how the speed of light is measured? Those are completely different things As I asked before, separate threads, please
Why does the Sun shine brighter some days? [duplicate] 1) The sun seems brighter (more dazzling) if there is more scattering in the atmosphere The sun would actually look very small to us in the sky if there were no atmosphere (it's the same angular size as the moon) and most of the brightness seen in the direction of the sun is from small deflection rayleigh scattering
Why does the Sun always rise in the East? - Physics Stack Exchange The Sun does not rise, it is the horizon that goes down You say that Sun rises in the East (with a certain degree of oscillations due to the tilt of the axis) just because the Earth spins from West to East The revolution affects the difference between sidereal time and solar time, and makes the solar day $\approx 4$ minutes longer If the Earth spinned in the opposite direction the Sun would
How come the Suns gravity can hold distant planets in orbit, but . . . First, we should speak of acceleration rather than force, because like I said earlier all objects at a given distance from the Sun experience different forces but the same acceleration You ask "how come the Sun is strong enough to keep the distant planets in orbit but I don't fall into it?"
Why do we say that the Earth moves around the Sun? 3 The sun, moon, earth (and so on) all move around each other The reason we say the earth moves around the sun is because the effects are more visible on a macro scale, and easier to predict with reasonable precision
Why does Sun appear white at noon? - Physics Stack Exchange The Sun appears white at noon because the sunlight reaching the observer maintains its full spectral composition, meaning that all visible wavelengths arrive in nearly equal proportions
orbital motion - Finding how much time it takes for a complete Earth . . . Can you elaborate on how precession changes how long it takes the Earth to complete an orbit around the sun? I am having a hard time seeing how a wobbly axis could either change the length of a day or the speed at which the Earth orbits the sun - and 20+ minutes year seems like a big difference
What determines the surface temperature of the sun? The core temperature of the sun is on the order of 15 million degrees kelvin while its surface temperature is around 6000k What are the main factors which determine the surface temperature of the
Nuclear fission in the Sun - Physics Stack Exchange The Sun's energy comes primarily from fusion of light elements in its core It is estimated that a very small fraction of mass of the Sun (~$10^{-12}$ times the abundance of hydrogen) is uranium (b