Frequency combs provide a link between optical frequencies (hundreds of THz) and microwave frequencies where electronics operate (hundreds of MHz). This capability is essential for optical atomic clocks, which must use frequency combs…

The precision of a clock is limited by how fast its “pendulum” swings. So, for the past several hundred years, humans have built clocks with faster and faster “pendulums”, trading the actual pendulum for spring-loaded wheels and then rapidly-vibrating quartz oscillators…

Several decades ago, astronomers had no reliable way of detecting planets around distant stars (exoplanets), and many assumed that most of these stars did not have any planets orbiting them. However, recent technological innovations have enabled new methods for finding planets outside of our solar system (exoplanets)…