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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 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
- Is the distance between the Sun and the Earth increasing?
Besides the moon, the sun has a tidal component for the earths oceans, and when that crashes into continents the energy absorbed comes from the potential energy of the sun-earth system I am not sure how this compares to the distance loss due to the mass and energy radiation of the sun you mentioned
- newtonian mechanics - Why Sun is not able to attract mercury closer . . .
The Sun is pulling Mercury If the Sun were not pulling Mercury, it would go out of the Solar system in a straight line It's a balancing act between the Sun's pull inwards and Mercury's tangential speed It just so happens that the Sun's pull and Mercury's speed balance out just right to keep Mercury in a stable orbit Actually, it's a bit more complicated, which is why Mercury's elliptical
- How is Earth protected from the gamma rays generated by the Sun?
The Sun is generating energy by nuclear fusion This nuclear fusion will emit energy in the form of gamma rays Normally, the earth's ozone layer filters the ultraviolet radiation while the earth's
- What would happen if Jupiter collided with the Sun?
This question is inspired by a similar one asked on Quora Let's say a wizard magicked Jupiter into the Sun, with or without high velocity What happens? The Quora question has two completely oppo
- 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
- Where is nuclear fusion occuring in the Sun? - Physics Stack Exchange
My understanding is that the sun is basically a sphere of hydrogen with a helium core, and that the hydrogen is undergoing nuclear fusion to produce helium There are many images and cross-sectional
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