So exactly how many solar system moons have we found? The answer, it turns out, depends on your definition of a moon. The International Astronomical Union (IAU) officially recognizes 288 planetary ...

There are also moons in the solar system, that is objects orbiting around the planets. In fact just over 180 moons at the last count. And some of those moons are so large that if they were ...

With a sun more than 4.5 billion years old, our solar system is considered "middle-aged," and the pictures of what it might ...

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The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long ...

While we perceive the Sun as yellow, its actual colour is white. This is because our atmosphere scatters the shorter, blue ...

Most of the planets are aligned in our night sky right now, providing a treat for skywatchers. Are such "planetary parades" ...

Once its rings vanish from sight in March 2025, Saturn will look like a pale yellow sphere through most telescopes.

Long after the planets of the Solar System formed, catastrophic collisions ... is thought to have shaped the terrestrial planets and moons, their atmospheres and possibly even the onset of life.

The seven other planets in our solar system will line up in the night sky on Friday evening for a rare alignment called a ...