ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] I.-APPARENT MAGNITUDES: (a) VISUAL. THE magnitude of a star, as determined by direct astronomical observation, is a measure of its apparent brightness on a scale which has been precisely defined only within recent years. Hipparchus was, so far as is known, the first to assign magnitudes to the ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/107142a0