'The sun completes one revolution around the center of this galaxy every 225 million years'
Milky Way
THE SUN: The sun completes one revolution around the center of this galaxy every 225 million years
The sun completes one revolution around the center of this galaxy every 225 million years
The sun completes one revolution around the center of this galaxy every 225 million years
THE SUN
Milky Way
THE SUN