Earth will reach its closest point to the Sun, known as Perihelion Day. This occurs every year in early January, and though ...

The Parker Solar Probe, traveling at 430,000 mph, reaches 3.8 million miles from the Sun. Scientists now wait for a signal ...

Earth's rotation on its axis creates the illusion of the sun rising in the east and setting in the west. This rotation, coupled with Earth's orbit around the sun and its axial tilt, dictates our ...

The Sun's activity is what gives us beautiful auroras — but it also has dramatic negative effects on satellites that go around Earth in a low orbit. In early November, three tiny Australian ...

The Parker Solar Probe is expected to pass within an "unprecedented" 3.86 million miles of the solar surface on Dec. 24, ...

Launched into space in 2018, the Parker Solar Probe is increasingly tightening its orbit around the Sun. The most significant ...

20-23. This variation is due to how the calendar aligns with Earth's orbit around the sun. In 2024, the solstice falls on Dec ...

Thomas Zurbuchen was the head of science at NASA from 2016 to 2022.

Welcome to astronomical winter. Our calendars mark the beginning of winter as Dec. 21 or 22 because of where Earth is in its ...

ESA has launched three other Proba missions thus far, with one currently observing the Sun. Proba-2 launched in 2009, and was ...