IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 weird and wonderful worlds across 4,300 planetary systems have been ...

Once inside this zone, the planet’s own gravity was no longer ... a white dwarf—just like the one in the Helix Nebula. While ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The International Astronomical Union officially recognized 128 new moons orbiting ...

Five planets are visible to the naked eye, according to NASA: Mercury, Venus, Mars, Jupiter and Saturn. Mars will appear reddish and high in the sky, near the Gemini constellation, Star Walk said.

Using data collected by NASA's Juno spacecraft as it flew past Jupiter's highly volcanic moon Io in late 2023 and again in ...