Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
A coordinate used by astronomers to locate stars and other
celestial objects in the sky. Right ascension is comparable to
longitude, but it is measured in hours, minutes, and seconds
because the entire sky appears to pass overhead over a period of 24
hours. The zero hour corresponds to the apparent location of the
Sun with respect to the stars on the day of the vernal (spring)
equinox (approximately March 21).