A new paper examining and simulating the formation of wide-orbit planets has put the chances of our own Solar System ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds ...

Beyond the edge of Neptune, a distant realm of icy debris known as the Kuiper Belt stretches deep into space. This frozen ...

The dwarf planet's existence also opens the likelihood of many more like it in our solar system waiting to be found. From our morning news briefing to a weekly Good News Newsletter, get the best ...

June 3, 2025 — Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this ...

they're hunting for the planet's own heat signature. The story begins with a puzzle in the outer solar system. Scientists noticed that small icy bodies called Kuiper Belt Objects, which orbit far ...

Most of the stars across the Milky Way are small red dwarfs like TOI-6894, which has only 20 percent the mass of our Sun.

Planet Nine, also called Planet X, has never been caught on a telescope (Picture: Getty Images/Science Photo Libra) Scientists hunting for Planet Nine, an elusive planetary body that could change ...

Jupiter, the largest planet in the solar system, was 2 to 2.5 times bigger in its earlier life, according to new research. Credit: NASA / JPL-Caltech / SwRI / MSSS / Tanya Oleksuik Jupiter ...

More than 150 moons orbit worlds in our solar system. Known as natural satellites, they orbit planets, dwarf planets, asteroids, and other debris. Among the planets, moons are more common in the ...

The Atacama Large Millimeter/submillimeter Array (ALMA) has uncovered a key piece of the puzzle in how rocky planets, such as ...

Observations of the potential Planet Nine are extremely difficult, as it's so far out in the Solar System that it would reflect only the tiniest amount of sunlight. Predictions estimate that the ...