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

Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around ...

Since Pluto is located so far from the sun, it takes around 248 Earth years for Pluto to orbit the sun. Pluto's orbit around the sun is not only a very long journey, it's also elliptical, resembling a ...

Astronomers have directly observed a free-floating planet, comparable in mass to Earth, roaming the Milky Way. Discovered via ...

Earth reaches its closest point to the sun, perihelion, in January, a fact that surprises many as winter grips the Northern Hemisphere. Scientists clarify that Earth's axial tilt, not proximity to the ...