All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

but factors such as a planet’s size, gravitational pull, Hill sphere radius and how its solar system formed may play a role.

Monroeville Public Library is holding a three-part children’s series on space, where participants learn fun facts about the ...