Io’s long-debated magma ocean may not exist. Juno spacecraft data reveals that tidal forces deform the moon differently than expected if a magma ocean were present. Instead, Io’s mantle appears mostly ...

Plus: A solar eclipse and an occultation of the Pleiades as our satellite skims through several constellations in the sky ...

NASA launches NF-5, revolutionizing planetary missions with advanced technology to explore new horizons on the Moon and in ...

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

What's on and in a star? What happens in an active galactic nucleus? Answering those questions is the goal of a proposed ...

Sunrise: 6:55 A.M. Sunset: 9:18 P.M. Moonrise: 5:01 A.M. Moonset: 2:55 P.M. We’re back at Jupiter in Taurus this evening to watch the innermost Galilean moon, Io, now transit the disk alongside ...

Scientists have long sought to determine the age of the moon's South Pole–Aitken (SPA) basin, the largest and oldest known ...

The number of known moons in our Solar System has been rising for centuries, but astronomers say it has probably peaked – for ...

Stargazers who looked up at the sky last night and early this morning might have spotted the March 2025 "Blood Moon," a total lunar eclipse that colored the moon in shades of red, orange and yellow.