For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

Over millions of years, these objects grew larger, sweeping up material in their orbits and becoming the planets we know today. This model of solar system formation is known as the nebular hypothesis.

All must, then, be regarded as having always been members of the solar system, however much their orbits may have changed ... of the viscosity with the time. Scientific Papers, vol.

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.

After its successful lunar touchdown, Firefly Aerospace’s Blue Ghost mission could soon be joined on the moon by two more commercial spacecraft ...

At a frigid -125 degrees Fahrenheit (-87 degrees Celsius), WD 1856+534 b is the coldest planet ever directly observed, surpassing the previous record-holder, Epsilon Indi Ab, which stands at around 35 ...

In recent years, humanity has visited several near-Earth asteroids (NEAs), including Ryugu (Hayabusa2) and Didymos (DART).

However, the prospect of Planet Nine remains a debated topic within the scientific ... orbits observed among some objects in the Kuiper Belt at the outer edges of our solar system.

That’s when the U.S.-based Minor Planet Center, the world’s official repository of all asteroid and comet orbits ... called the Nice model, which posits that the solar system began with ...

China continued its interstellar exploration, with Tianwen-2 - the country's first asteroid probe and sampling mission - ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto ... According to his models, to explain the clustering and movement of other objects in ...