Scientists have used data from ESA and NASA's Solar and Heliospheric Observatory, or SOHO, to detect a type of wave called g-modes on the Sun. These g-modes reveal that the solar core is rotating ...

Elongation is the angle, in degrees, between the Sun and the planet as seen from here on the Earth. Superior planets (those that lie further from the Sun than us: Mars, Jupiter, Saturn, Uranus, ...

The other mirror (mirror B in the diagram) is attached to a movable arm. Light from an object, let's say the sun, reflects off this mirror. The arm can be moved to a position where the sun's ...

In contrast, during a total solar eclipse — which is preceded by a partial eclipse — the moon completely covers the sun, ...