What is space weather, what causes it, and how does it affect humans? Physicist Robyn Millan, who co-chaired a recent National Academies decadal report on solar and space physics, answered questions ...

A newly confirmed exoplanet around a nearby sunlike star might be astronomers’ best chance yet to look for life beyond the ...

Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...