But NASA Administrator Jim Bridenstine wants answers.
A new thermoelectric device can generate electricity for an LED light bulb even during the blackest night, according to a report by researchers.
Relativity Space, a company that builds and lofts 3D-printed rockets, will launch a half-dozen missions for the in-orbit shuttle service company Momentus beginning in 2021.
Feel like going for a spin around Mars? A new video shows a 3D view of where the European-Russian ExoMars rover will land, in a region that was likely filled with water billions of years ago.
Astronomers are rushing to study what appears to be the first known interstellar comet — and in some of the very earliest observations, it looks oddly familiar.
Brad Pitt says his new space movie, "Ad Astra," won't have a clear position on whether humanity is alone in the universe.