
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 almost exact total solar
sun - Why is sunlight spectrum continuous? - Physics Stack Exchange
The sun's spectrum is very complex, and indeed there are a lot of "lines"—both light and dark (emission and absorption)—amidst a sea of what looks to be continuous frequencies.
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
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...
How to get 3D coordinates (XYZ) of the sun given Azimuth and altitude ...
Apr 22, 2022 · 0 I want to create an Augmented Reality (AR) application to show the sun's position where I need the 3D (XYZ) coordinates to plot in Augmented Reality (AR). Main question: I need to …
orbital motion - Finding how much time it takes for a complete Earth ...
Nov 29, 2019 · 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 …
Why does the Sun always rise in the East? - Physics Stack Exchange
Nov 26, 2014 · 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 …
What is actually meant by 'sun set' and 'sun rise' times, when taking ...
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 example …
Does the Earth actually rotate around the sun? [duplicate]
Dec 23, 2014 · Why does one say that the Earth rotates around the sun? There should be no preferred reference frame and from an observer on the sun, the sun will rotate around the Earth.
What determines the surface temperature of the sun?
Jun 20, 2018 · 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 …