This is caused by Earth traveling around the sun. One side faces the sun and the other side does not.
What is the causes of day and night on Earth?
The phenomena occurs Moon is between the Sun and Earth, leading to Moon's shadow on Earth.
What is a solar eclipse?
The moon is always half lit by the Sun and other half is not, just like Earth. As the moon rotates around Earth, we see the moon at different angles which causes us to see more or less of the moon lit by the Sun, there causing this phenomena.
What does our Moon have different phases?
This is a giant collection of stars, planets, and other celestial events bound together by gravity. Earth is a part of this.
What is the Milky Way Galaxy?
What causes Earth to have four seasons?
The phenomena occurs Earth is between the Sun and Moon, leading to Earth's shadow on the Moon.
What is a lunar eclipse?