This model gives us more insight into why celestial bodies stick to their paths through space. Even though we’re constantly falling toward the Sun, neither we nor any living creature on Earth ...

yet the pull of Earth's gravity never hauls the complex out of orbit and sends it plummeting through our atmosphere, where it would burn up. Here's a little secret: The ISS is always falling!

which was falling through a break in the clouds in the night sky, changing in color from green to red. A fireball occurs when a fragment from an asteroid enters the Earth's atmosphere, heats up ...