EVERYDAY SCIENCE

Detailed explanation-1: -Our solar system orbits the center of the Milky Way galaxy at about 515, 000 mph (828, 000 kph). We’re in one of the galaxy’s four spiral arms.

Detailed explanation-2: -Our Sun lies near a small, partial arm called the Orion Arm, or Orion Spur, located between the Sagittarius and Perseus arms.

Detailed explanation-3: -Milky Way, stuffed with between 100 billion and 400 billion other stars, many of them with planets of their own. The Milky Way got its name from the way it looks from the ground: like a streak of spilt milk across the sky. That hazy white band is made up of stars, dust and gas.