What is the simplest way to prove that Earth orbits the Sun?
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
How come the Sun''s gravity can hold distant planets in orbit, but
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
How much lux does the Sun emit?
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
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
Nuclear fission in the Sun
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
Why does Sun appear white at noon?
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
What is actually meant by ''sun set'' and ''sun rise'' times, when
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
astronomy
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
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
Why does the Sun always rise in the East?
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