Glossary

 

 

ASTRONOMICAL UNIT

A unit of length equal to the average distance between the earth and the sun ( about 92,955,807.27 miles ).

AU

Abbreviation: Astronomical unit

BARNARD


  • E.E. Barnard - (1857-1923) American observational astronomer best known for his discovery of Barnard's Star.  The red dwarf star, with a proper motion of 10.3 arc seconds per year, has the highest proper motion relative to the sun of any known star.

  • Catalogue of 349 Dark Objects in the Sky - A catalog of dark nebula compiled by American astronomer E.E. Barnard and published in 1927.

BOLIDE

There is no formal definition for a bolide but a generally accepted one is a bright meteor that explodes. There are several accepted brightness criteria with a wide range of magnitudes: -4 (Venus) to -14 (Full Moon).

DEC

Abbreviation: Declination

 Posted by at 12:49