A new study analyzed how NASA's Habitable Worlds Observatory might be able to confidently spot biosignatures in the atmosphere of a distant ancient Earth.

As Steven Spielberg's alien conspiracy thriller "Disclosure Day" heads to theaters, Space.com talks to the astronomer who has led efforts to make sure any real alien detection will not be kept a secret.

Scientists failed to find radio signals emanating from the interstellar comet 3I/ATLAS, further bolstering its status as a natural object, not one made by aliens.