Simplify the following text for a Grade 2 native English-speaking person.
Original: Because the Earth 's orbit around the Sun is also elliptical , the Earth 's distance from the Sun similarly varies throughout the year . This affects the apparent sizes of the Sun and Moon in the same way , but not so much as the Moon 's varying distance from the Earth .
Simplified: This is why the Sun and Moon seem to be about the same size from Earth .