The European Space Agency announced Thursday the Gaia spacecraft was turned off after a decade of data gathering.

The orbit Venus takes around the sun results in an inferior conjunction as it transitions from appearing in the evening sky ...

Ellipses are defined as curves that surround two focal points. At any point on the ellipse, the sum of the distance to both ...

Flares on the sun’s eastern limb will head away from Earth as the sun rotates, but those on the western limb may hit the planet’s atmosphere, Mason says. For now our viewpoint means we can’t ...