Because it's a planet not a star like the sun...
becase the sun or the moon is shining on that part of the earth
A faint galaxy appears as not shining, and look faint from the earth due to distance.
the earth is heated by the sunlight and it affects it by it being too hot when the sunlight is shining on earth.
a lunar eclipse.
It's an example of radiation.
There is no answer for this; the Sun has been shining for about 4.5 billion years, and the Earth has existed for about that long. As long as the Earth has been spinning (probably, since the collision that formed the Moon when the Earth was young) the Sun has been shining over the whole thing each day.
day and night
There is never a time when the sun isn't shining. The sun has been shining for four and a half billion years and will continue to shine for [it is assumed] another seven and a half billion years.
The Sun is always shining on Mars just like earth.
The sign of Mary is a smiling sun shining upon heaven and earth.
Earth Wind and Fire - Shining Star
It's called a lunar eclipse.