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

Early risers have probably been marveling at the dazzling white "star" now appearing in the eastern sky at dawn. It is, of ...

Some lucky stargazers could have a double feature of the planet Venus this weekend. On Saturday and Sunday, the Earth will have an inferior conjunction (closest approach) with Venus, the sixth-largest ...

Venus will pass between the Earth and sun on Saturday during what's called an inferior conjunction. The moment of conjunction will happen at around 9 p.m. EDT, but don't plan on seeing the linkup. The ...

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 ...

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