NASA's Perseverance rover has spotted new signs of an ancient river on Mars, deeper and faster than any seen before. Curving layers of rocks provide the clues.
Saturn's moon count grew by 62 with the newest discovery, bringing the planet's satellite total to 145. That puts it above Jupiter's 95 recognized moons.
How old are Saturn's rings? A new study suggests they're only about 400 million years old at most, much younger than Saturn itself. Dust provided new clues.
Astronomers have found the largest cosmic explosion yet seen, from a cloud of dust around a black hole. So far the explosion has lasted more than 3 years.
NASA invites the public to participate in its Astrophoto Challenge for summer 2023. For this challenge, the focus is on the Phantom Galaxy. Details here.
Skylab was America's 1st space station. Three crews lived and worked there for over 171 days, studying the sun and Earth and setting records for life in space.
Researchers in France say that the moon's inner core is solid, with a density close to that of iron, solving a long-standing debate about the heart of the moon.
Astronomer Guy Ottewell discusses how the recent discovery of a star swallowing a late planet can help refine an estimate for part of the Drake Equation.