Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion. We are slightly nearer to our star and receiving more solar energy than we ...

Every January, Earth reaches its closest point to the Sun, known as perihelion. Yet, it’s winter in the Northern Hemisphere. This may seem odd: why is it colder when we’re supposedly closer to the Sun ...

Despite the winter solstice being the shortest day, the sun has been rising later in the weeks following it. This phenomenon is due to the Earth's elliptical orbit and axial tilt, which causes a ...