(astronomy) A phenomenon occurring when the Moon passes between the Earth and the sun.

plural of solar year

The time it takes the Earth to pass once around the Sun, as reckoned with respect to the seasons and not the fixed stars (for instance from vernal equinox to vernal equinox).

Synonym of sun letter

plural of solar letter

plural of solar eclipse

Alternative spelling of extrasolar

(astronomy) A telescope designed to make observations of the sun.

Any engine that converts energy from the sun into electrical or mechanical energy; especially such an engine used for the propulsion of a spacecraft.

plural of solar system