Who was the first scientist that suggested that the sun was the center of the solar system.

Which scientist discover that gravity holds the planets in their orbits?

Select the classification of planets according to their PROPERTIES

Select the number of planets in the solar system

Select the closest planet to the sun

This planet is often called red planet

This scientist suggested that comets were ordinary celestial objects not supernatural visitors.

When a space rock survive its passage through the atmosphere and reach the earth's surface is called?

Select the only planet that has living organisms.

This glowing space rock, that people call "shooting stars" are: