(1) Bright region of the Sun's photosphere. Faculae can occur anywhere on the Sun, but the largest faculae are found near sunspots.
Temperature scale on which water freezes at 32 oF and water boils at oF. The conversion between the Fahrenheit temperature scale (F) and the Celsius temperature scale (C) is: F=32+1.8xC
The full angular extent of the sky being viewed by an instrument.
A solar prominence which is seen as a dark streak against the bright disc of the Sun, and appears as bright streams of plasma in the solar corona which appear to radiate away from the Sun when seen off the solar limb.
See Herschel mission.
See Critical density.
Axis or geometric plane where incoming light is focused by the telescope.
Point at which converging rays meet and at which a clearly defined image can be obtained.
French overseas territory on the north-east coast of the South American continent where the European Spaceport of Kourou is located.
See Nuclear fusion.