How much lux does the Sun emit? - Physics Stack Exchange
6 Jan 2026 at 8:28pm
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
astronomy - How big a coincidence is the Sun and Moon having almost ...
2 Jan 2026 at 2:06pm
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
6 Jan 2026 at 12:40am
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]
4 Jan 2026 at 5:24pm
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?
6 Jan 2026 at 5:04am
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 come the Sun's gravity can hold distant planets in orbit, but ...
29 Dec 2025 at 9:53am
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 does the Sun always rise in the East? - Physics Stack Exchange
5 Jan 2026 at 9:05pm
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 ...
Why do we say that the Earth moves around the Sun?
4 Jan 2026 at 4:55pm
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.
Nuclear fission in the Sun - Physics Stack Exchange
1 Jan 2026 at 10:21pm
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 the simplest way to prove that Earth orbits the Sun?
6 Jan 2026 at 8:35pm
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 that the Moon orbits Earth?
WHAT IS THIS? This is an unscreened compilation of results from several search engines. The sites listed are not necessarily recommended by Surfnetkids.com.
6 Jan 2026 at 8:28pm
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
astronomy - How big a coincidence is the Sun and Moon having almost ...
2 Jan 2026 at 2:06pm
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
6 Jan 2026 at 12:40am
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]
4 Jan 2026 at 5:24pm
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?
6 Jan 2026 at 5:04am
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 come the Sun's gravity can hold distant planets in orbit, but ...
29 Dec 2025 at 9:53am
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 does the Sun always rise in the East? - Physics Stack Exchange
5 Jan 2026 at 9:05pm
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 ...
Why do we say that the Earth moves around the Sun?
4 Jan 2026 at 4:55pm
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.
Nuclear fission in the Sun - Physics Stack Exchange
1 Jan 2026 at 10:21pm
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 the simplest way to prove that Earth orbits the Sun?
6 Jan 2026 at 8:35pm
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 that the Moon orbits Earth?
WHAT IS THIS? This is an unscreened compilation of results from several search engines. The sites listed are not necessarily recommended by Surfnetkids.com.
