An Astronomical unit (AU) is defined as the average distance between the
Sun and the Earth
Sun and the Earth
Mercury can be said to be about 1/3 of an AU from the Sun and Pluto averages about 40 AU from the Sun
The average distance from the Sun to the Earth is approximately 93 million miles
It takes approximately 8 minutes for light from the Sun to reach the Earth
Light moves at a velocity of approximately 186 411.357 67 miles each second
A light year is the distance that light can travel in one year
One light year is equal to 5 903 026 326 300 miles
Astronomers use units of a light year to calculate distances from outside of
our solar system
The Milky Way Galaxy is approximately 150,000 light-years across
The distance to the next nearest star, Proxima Centauri from Earth is
24 854 847 689 000 miles
The distance to Proxima Centauri is 4.24 light years
The distance to our nearest galaxy, the Andromeda Galaxy is
13 048 795 037 000 000 000 miles
The Andromeda Galaxy is 2.3 million light-years away
Einstein's equation, E = mc² is the equation of mass-energy equivalence where E is energy, m is mass, and c is the speed of light in a vacuum
The Math of General Relativity is: (curvature of space-time) = (mass-energy density) * 8 pi G / c4
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