Half-month
Encyclopedia
A half-month is a unit of time typically used in astronomy
. Each month
is separated into two parts:
Unidentified celestial objects, such as comets and asteroids, are given a provisional name that contains the half-month as a letter of the English alphabet
. For example, an object seen in the second half of January would be identified with the letter B; if seen in the first half of February, the letter would be C.
Astronomy
Astronomy is a natural science that deals with the study of celestial objects and phenomena that originate outside the atmosphere of Earth...
. Each month
Month
A month is a unit of time, used with calendars, which was first used and invented in Mesopotamia, as a natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept arose with the cycle of moon phases; such months are synodic months and last approximately...
is separated into two parts:
- days 1-15
- day 16 through the end of the month.
Unidentified celestial objects, such as comets and asteroids, are given a provisional name that contains the half-month as a letter of the English alphabet
English alphabet
The modern English alphabet is a Latin alphabet consisting of 26 letters and 2 ligatures – the same letters that are found in the Basic modern Latin alphabet:...
. For example, an object seen in the second half of January would be identified with the letter B; if seen in the first half of February, the letter would be C.