This is why Aries sign starts on March 21 in Western astrology. Sidereal zodiac coordinate system is used in Indian astrology, Jyotisha.
As you can see, the sidereal zodiac coordinate system is a fixed coordinate system.
But the tropical zodiac coordinate system is a relative coordinate system.
amino-acid racemization: a method used in the dating of both human and animal bone.
Its special significance is that with a small sample (10g) it can be applied to material up to 100,000 years old, i.e. ancillary sample: any non-artifactual materials collected by archaeologists to aid in dating, paleoenvironmental reconstruction, or other interpretations - e.g.
The calendar therefore drifts by days relative to the sun each Islamic year, and would require Islamic years to get back in synchronization.
As a result, the calendar uses an 11-year leap year cycle.
The subject is generally broken down into three subdisciplines: biological (physical) anthropology, cultural (social) anthropology, and archaeology.
archaeological culture: a constantly recurring assemblage of artifacts assumed to be representative of a particular set of behavioral activities carried out at a particular time and place (cf. archaeomagnetic dating: sometimes referred to as paleomagnetic dating.
Aldebaran is defined as the middle point of the Taurus sign; while Antares is defined as the middle point of the Scorpius sign.