A precise mass can be determined for the companion when direct imaging is combined with radial velocity measurements. In some ...

For years, astronomers have sought a way to directly observe the atmospheres of exoplanets, worlds orbiting distant stars.

Four small, newly discovered worlds are less than six light-years away from Earth, and their discovery reinforces a ...

Abstract: In this paper, an ISAR imaging method that uses second harmonic signals to extract motion parameters of multi-rotor unmanned aerial vehicles (UAVs) in an environment containing other natural ...