Finding alien worlds on Earth

Have you ever wondered which places on Earth most resemble other planets? For some of us, imagining the landscape of other worlds might just be for fun, but scientists and engineers wonder about what the otherworldly places on Earth can tell us about neighbours like the Moon and Mars.

Einstein's theory helps detect alien worlds

Detecting alien worlds presents a significant challenge since they are small, faint, and close to their stars. The two most prolific techniques for finding exoplanets are radial velocity (looking for wobbling stars) and transits (looking for dimming stars).