A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar ...

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.

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, speeding through our celestial neighborhood.

This diagram shows the trajectory of interstellar comet 3I/ATLAS as it passes through the solar system. It will make its closest approach to the Sun in October.

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It was first discovered zipping near the sun this fall.

A mysterious object the size of Manhattan, originating from outside our Solar System, has been spotted by astronomers. Experts have confirmed the discovery of this rare interstellar visitor—only ...

What will the rise of floating solar panels mean for wildlife? As the market for floatovoltaics explodes, scientists are studying how to make the systems also work for waterbirds and other organisms.

Watch sunspot region 4114 erupt with its most powerful solar flare yet. The X1.9 class flare triggered radio blackouts across the Pacific Ocean.

Today in the history of astronomy, satellites Vela 3 and 4 make the first detection of gamma-ray bursts.