Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.

Long-term satellite measurements show that Earth’s magnetic field is changing faster and more unevenly than expected, driven ...

The Earth became darker from 2001 to 2024, meaning it reflects less sunlight, a research team reports in the journal Proceedings of the National Academy of Sciences. The development is more pronounced ...

Every year, Earth follows a familiar pattern of seasonal changes: As summer rolls around in the Northern Hemisphere, winter creeps in in the Southern Hemisphere, and vice versa. But do other planets ...