Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

For decades, the four known forces of nature, gravity, electromagnetism, and the strong and weak nuclear forces, have ...

Astronomers have discovered a new member of a rare and mysterious class of solar system objects known as sednoids — a subset of extreme trans-Neptunian objects (ETNOs) with exceptionally distant, ...

Io orbits Jupiter so closely that it’s constantly being stretched and crushed by gravity. That pressure generates extreme ...

Scientists have been trying to find a hypothetical Planet 9 that may exist outside our known solar system based on the unusual orbits of certain dwarf planets. But those orbits might not require a ...

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...

The dynamic exoplanet system TOI-201 is changing so rapidly that astronomers say it may look extremely different to us in two ...

Easy: Venus is the weirdest planet in the solar system. The most distant major planet from the sun and the last stop before ...