The real restriction here is the speed of light ... yes it seems that the Earth is the center of the Universe, just like ...

Sometimes the “whys” of history are lost, and that holds true to why Capt. John Cleves Symmes Jr. wholeheartedly believed the Earth was hollow.

An curved arrow pointing right. Here's what would happen if you jumped through a vacuumed hole that cut through the center of the Earth. Produced by Delano Samuels. Original reporting by Jessica ...

TL;DR: NASA astronaut Don Petitt captured a stunning long exposure image from the ISS, resembling a scene from "Interstellar." The photo, taken from the SpaceX Crew Dragon capsule, shows star ...

The Colorado Center for Astrodynamics Research (CCAR) is dedicated to the study of astrodynamics and the application of satellites to science, navigation, and remote sensing of the Earth and planets.

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...