What if the Sun exploded today? This video explores the catastrophic effects such an event would have on Earth and our solar ...

Every year, our planet makes one full trip around the Sun. And while that means we’re already moving at breakneck speeds, we’re about to ramp that speed up. Like, way up! Let’s turn Earth into a ...

The bold question-askers at What If investigate what would happen if the sun were smaller than Earth.

A quasar near Earth would overwhelm the Sun, destroying the atmosphere and boiling oceans. Life would quickly become ...

"What if instead of shining brightly for another 5 billion years, the only star in our Solar System turned into a dark and cold remnant? A black dwarf. How long would the Earth last without all the ...

Research shows Jupiter’s strong gravitational pull may have protected Earth by keeping its orbit steady and preventing it from drifting toward the Sun.