It takes about 8 minutes 20 seconds for light from the Sun to reach the Earth.
8 min
At any given time, half (50%) of Earth is exposed to sunlight.
The average time that it takes for light to travel from the moon's surface to the earth's surface or vice versa is about 1.255 seconds.
Half of Earth is illuminated by the sun at all times.
It takes 1 year.
It's not so much the Sun that changes; rather, Earth's axis is tilted (with respect to a perpendicular to Earth's plane of orbit). As a result, when Earth is on one side of the Sun, the northern hemisphere gets more sunlight; when Earth is on the other side of the Sun, it is the southern hemisphere that gets more sunlight.
At its closest point, sunlight only takes 490 seconds to reach Earth.
At any given time, half (50%) of Earth is exposed to sunlight.
The average time that it takes for light to travel from the moon's surface to the earth's surface or vice versa is about 1.255 seconds.
"To reflect the sun to the moon?" Your question does not make sense as worded. It takes a little over a second for sunlight to reflect from the moon to earth, if that is what you are asking. The sun does not reflect anything--it can't. Sunlight takes 8.3 minutes to reach the moon, then a bit over a second to get from the moon to earth.
Half of Earth is illuminated by the sun at all times.
Lots!
Mars gets LESS sunlight than Earth does, because of its greater distance from the Sun.
light that travels from the sun is solar wind. it takes the light 8 minutes to reach earth.
The moon's synodic period, the time it takes to come back to the same phase relative to the Earth and Sun, varies but, on average, is 29.53 days.
Too much heat depletes the ozone layer making earth more warmer.
it takes at least 45,900,000,000,000,000
about seven minutes