Perihelion is an annual astronomical event when Earth finds itself at the closest distance possible toward the Sun. Usually it falls between the dates of January 2 and 4 as Earth is around 147 million ...

An illustration of the analemma—a figure-eight pattern formed by plotting the sun’s position at the same time each day over a year. We’re all familiar with the sun’s daily motion in the sky. It rises ...

Comet Lemmon is set to make its closest approach to Earth in around 1,300 years on Tuesday, with good viewing opportunities for the greenish cosmic snowball expected until Nov 2 as it brightens upon ...

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy of Sciences hopes to address as a team of ...