Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

The outer solar system begins where sunlight fades and distances stretch beyond everyday comprehension. This journey traces ...

Jupiter’s moons are among the most fascinating worlds in the solar system, but reaching them is a monumental challenge. This ...

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison with Pluto.

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

The system, observed using the European Space Agency's Cheops space telescope, consists of four planets — two rocky and two ...

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...