Weirdly, spaceships have no direct way to gauge their own speed. Luckily, we can use some physics tricks to figure it out.

It is an old trope in submarine movies. A sonar operator strains to hear things in the ocean but dares not “ping” for fear of ...

GPS accuracy is so good that it's tempting to rely on it exclusively. That could be a mistake in abnomal traffic conditions.

Our sun is a roiling mass of energy, with solar flares exploding on its surface, sending gas, plasma, and light that blasts ...

In a tank on the bottom floor of a University of Chicago research laboratory, scientists summon "The Blob" into existence by ...