Astronomy
Why Neutron Stars Are Cosmic Lighthouses
Quick fact
Some neutron stars rotate over 700 times per second, and their beams are so precise that they can be used as cosmic clocks, rivaling atomic clocks in accuracy.
Why this is interesting
You've probably seen a lighthouse beam sweep across the night sky, but did you know the universe has its own lighthouses—dead stars that spin hundreds of times per second, flashing beams of energy like cosmic beacons?