Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a ...

Among the planets, moons are more common in the outer reaches of the solar system. Mercury and Venus are moon-free, Mars has two small moons, and Earth has just one.

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.

Solar system coverage from Scientific American, featuring news and articles about advances in the field. Skip to main content. Scientific American. Solar system. The Universe June 20, 2025.

Mercury, the innermost planet of our Solar System, exhibits a uniquely dynamic magnetosphere that, despite its relatively weak intrinsic magnetic field, undergoes rapid and complex interactions ...

There could be a ninth planet in our Solar System after all — and no, it’s not Pluto. Instead, it’s the theoretical Planet X, also called Planet Nine, a wide-orbit planet that would circle the Sun ...

A computer visualization maps small bodies in the solar system that are expected to be observed by the Rubin Observatory during the 10-year Legacy Survey of Space and Time. Red indicates near ...

Scientists have unlocked one of the solar system’s many secrets from an unexpected source: a planetarium show opening to the public on Monday. At the American Museum of Natural History last fall ...

Solar System. See the First Breathtaking Images Captured by the Powerful New Telescope at the Rubin Observatory. Featuring never-before-seen views of galaxies and more than 2,100 newly discovered ...

From Stardust To Planets: The Beginning Of A Solar System According to Popular Science , roughly 4.5 billion years ago , a massive cloud of gas collapsed under its own gravity, forming our Sun .

Scientists have solved one of the solar system's enduring mysteries with the help of an unexpected source: a planetarium show. Last year, experts at the American Museum of Natural History were ...