Very slightly more than 50%.
1 half
the sun
rays of light from the sun
the answer is the sun
The Moon's lit portion, also known as its illuminated hemisphere, varies depending on its position relative to the Sun and Earth. At any given time, the Moon can show a full, half, crescent, or gibbous shape as sunlight illuminates different fractions of its surface.
The Sun has no moons. Moons orbit Planets > Planets orbit the Sun.
The percentage of the Moon that is lit by the Sun varies depending on its position in its orbit. At certain points, half of the Moon's surface may be illuminated (50%); this is known as a First or Third Quarter Moon. This occurs because we see different portions of the illuminated half from Earth as the Moon orbits.
Uneven heating from the sun.
There are no moons on the sun.
They reflect light from the sun back to observers on earth, unlike the stars, which emit their own light. Everything in our solar system is `lit up` by our sun, which emits light. The planets and moons (along with comets and other objects) don't emit light themselves, but are illuminated by the sun.
Approximately 50% of Earth's surface is always lit (daytime) due to the rotation of the Earth on its axis around the sun.
The moon is ALWAYS 50% (+/-) illuminated. Though we only see all of the half lit side when the moon is opposite the sun (Full Moon).