Astronomers have, for the first time, pinned down both the mass and distance of a planet that drifts through the galaxy ...

Where lies the land to which the ship would go? Far, far, ahead is all her seamen know. —Arthur Hugh Clough Astronauts heading for some distant planet may not be quite as ignorant as Clough’s seamen.

Of course, many different types of distance measuring sensors exist but not all sensors are the same. Each sensor has its own advantages and disadvantages. At its most basic level, a distance ...

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...