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- astronomy - How big a coincidence is the Sun and Moon having almost . . .
It's consensus that the very similar apparent sizes of the Moon and the Sun as seen from Earth is a coincidence (as already answered in this site) This provides us with almost exact total solar
- 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
- 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
- How long until the sun cannot sustain human life on earth?
The sun will last, at its current brightness for 9 billion more years How long until the sun gets burned down to the point where it cannot sustain life on Earth anymore? Updated: I am more concer
- 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
- 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
- What is actually meant by sun set and sun rise times, when taking . . .
If this is the case, then when we read things like what time sun sets and rises on websites, books, calendars, other official times, et al… does that mean when we see for example ‘sun set at 18:35’ is the time denoting the actual sun set taking into account of the mirage or what is visible to us
- 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
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