Scientists have long puzzled over why Mars, once protected by a global magnetic field like Earth, now shows only a magnetic ...

A super-Earth just beyond Mars would throw all the smaller rocky ... This may suggest that even rocky, Earth-size worlds in the habitable zones (the area around a star where temperatures are ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

Furthermore, the findings bolster the theory that the moon formed when a giant, Mars -size protoplanet slammed into the young ...

That's because the moon is far closer to the Earth than Mars, so what you see depends ... on any night can differ by about four times the diameter of the full moon. Related: Full moons of 2025 ...

Mars orbits at an average distance of 142 million miles (228 million km) from the sun. Its orbit is about 1.5 times the size of Earth's. Sunlight takes about 13 minutes to get to Mars, while it ...

could exhibit features similar to the fatty acids produced on Earth by biological activity. The lack of geological activity and the cold, arid climate on Mars have helped preserve this invaluable ...