astronomy - How big a coincidence is the Sun and Moon having …
May 3, 2020 · 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 …
What is actually meant by 'sun set' and 'sun rise' times, when …
Feb 15, 2017 · 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 …
How much lux does the Sun emit? - Physics Stack Exchange
I want to know how much lux the sun emits on a bright day - I don't mean when one stares directly at the sun, but rather when one walks casually outside when the sun is shinning brightly. Now the
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. …
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
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 …
astronomy - How did Halley calculate the distance to the Sun by ...
Jun 2, 2012 · Two remarks. First, Halley never actually measured distance to the Sun - he died before the next opportunity arose; second, the method described in this answer is not the …
Why doesn't sun go all the way to the horizon during sunset?
Apr 14, 2023 · Everytime I see the pics of suset on beaches the sun appear to go all the way down to the surface of the sea (as shown in the picture) but when I see sunset in my region , …
What is the simplest way to prove that Earth orbits the Sun?
Apr 17, 2015 · Assume you're talking to someone ignorant of the basic facts of astronomy. How would you prove to them that Earth orbits the Sun? Similarly, how would you prove to them …
Where do planets get energy to revolve around sun? [duplicate]
Closed 11 years ago. We know that every planet in our solar system revolve's around the sun in a particular orbit. But were to they get the energy to revolve around the sun. And why do they …