Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

While it was making those observations, there were a myriad of background stars that also had their light captured incidentally. As with many space telescope missions, Kepler's dataset is open to ...

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...