4 Terms
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Space flight
Of or relating to the act of voyaging outside the Earth's atmosphere and into outer space, and the science involved in achieving it.
Industry: Aerospace
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Space flight
equinox
Aerospace; Space flight
The equinoxes are times at which the center of the Sun is directly above the Earth's equator. The day and night would be of equal length at that time, if the Sun were a point and not a disc, and if ...
equator
Aerospace; Space flight
An imaginary circle around a body which is everywhere equidistant from the poles, defining the boundary between the northern and southern hemispheres.
ellipse
Aerospace; Space flight
A closed plane curve generated in such a way that the sums of its distances from the two fixed points (the foci) is constant.
ecliptic
Aerospace; Space flight
The plane in which Earth orbits the sun and in which solar and lunar eclipses occur.
eccentricity
Aerospace; Space flight
The distance between the foci of an ellipse divided by the major axis.
exa (E)
Aerospace; Space flight
A multiplier, x1018 from the Greek "hex" (six, the "h" is dropped). The reference to six is because this is the sixth multiplier in the series k, M, G, T, P, E. See the entry for CGPM.
