WASHINGTON — A reaction wheel on NASA’s Kepler spacecraft continues to experience elevated levels of friction after a brief rest period, but project officials say that does not necessarily imply an ...

Science operations for NASA’s exoplanet-hunting Kepler telescope were suspended Jan. 17 when the spacecraft was placed into a 10-day safe mode to evaluate a balky reaction wheel, mission manager Roger ...

Over the past few decades, numerous space probes sent to the far-flung reaches of the Solar System have fallen silent. These failures weren’t due to communications problems, probes flying into ...

Researchers have developed a new method for getting satellites to orbit the Earth and it involves magnetic levitation. Current satellites often rely on a type of flywheel called a reaction wheel.