The Solar System is home to a remarkable range of planets, from tiny rocky worlds to massive gas giants. But just how big are ...

However, seismic anomalies detected on Mars by the InSight mission reveal that the mantle is far from smooth and contains ...

As Mars cooled, it formed a solid crust — eventually becoming a stagnant lid that trapped heat and slowed the planet’s internal motion. The solar system’s terrestrial planets (Mercury, Venus ... re ...

February ends with a treat for sky-gazers: a parade of seven planets across the night sky, including Mercury, Uranus and Neptune alongside typically bright planets such as Mars, Venus, Jupiter and ...