Index :

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faculae

A bright region of the photosphere seen in white light, seldom visible except near the solar limb.

fault

A crack or break in the crust of a planet along which slippage or movement can take place.

filament

A strand of cool gas suspended over the photosphere by magnetic fields, which appears dark as seen against the disk of the Sun; a filament on the limb of the Sun seen in emission against the dark sky is called a prominence.

fissure

A narrow opening or crack of considerable length and depth.

flare

A sudden eruption of energy on the solar disk lasting minutes to hours, from which radiation and particles are emitted.

flexus

A cuspate linear feature

fluctus

A flow terrain

fossa

A long, narrow, shallow depression.

Franklin, Benjamin 1706-1790

American public official, writer, and scientist. Franklin played a major role in the American Revolution and helped draft the Constitution. His numerous scientific and practical innovations include the lightning rod, bifocal spectacles, and a stove.

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