Generally speaking, exoplanets can be any size, and they are found in a wide range of orbits. Some have massive gas atmospheres; others are smaller with an icy or rocky composition. Debra Fischer Read Quote
Further ahead, I’d like to see tiny spacebots – smaller than your cell phone – travel outside our solar system to the nearest star system, Alpha Centauri. By keeping the mass of those spacebots low, we could more easily accelerate them. Debra Fischer Read Quote