Ever so slightly bigger than Earth, the exoplanet LHS 3844b orbits its parent star, LHS 3844, a red dwarf 48.5 light-years ...

An international team of astronomers reports the discovery of a new exoplanet orbiting a sunlike star as part of the Next ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

NASA plans to launch the Habitable Worlds Observatory in the 2040s, a mission whose goal is “to image Earth-like planets ...

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...

NASA's Curiosity rover was built for a 2-year Mars mission. Nearly 14 years later, it is still making history in Gale Crater.

Researchers using the Hubble Space Telescope have discovered water vapor in the atmosphere of planet K2-18b, located about ...

NASA's relationship with UFOs has evolved alongside broader changes in public and government interest in unexplained ...