Noun
An astrologer.
One who is versed in astronomy; one who has a knowledge of the laws of the heavenly orbs, or the principles by which their motions are regulated, with their various phenomena.
Source: Webster's dictionaryA further complication is the use of numeric superscripts to distinguish neighboring stars that Bayer (or a later astronomer) labeled with a common letter. Source: Internet
Actual proof of the Milky Way consisting of many stars came in 1610 when the Italian astronomer Galileo Galilei used a telescope to study the Milky Way and discovered that it is composed of a huge number of faint stars. Source: Internet
Argo Navis is the only one of the 48 constellations listed by the 2nd century astronomer Ptolemy that is no longer officially recognized as a constellation. Source: Internet
An astronomer knows the structure of the universe and a great deal about telescopes - optics, pointing and cameras (or other sensing elements). Source: Internet
A plaque at the Observatory of Paris, where the Danish astronomer happened to be working, commemorates what was, in effect, the first measurement of a universal quantity made on this planet. Source: Internet
Although he was still alive at the time when his proposal was presented at Rome, it does not seem that he made the presentation; it was handled by his brother Antonio, also a physician and astronomer. Source: Internet