Astronomical dating system
Martin George, former president of the International Planetarium Society, now at the National Astronomical Research Institute of Thailand, also participated in the work.
"This is an example of where the scientific community can make a contribution to knowledge described in important ancient texts, " said Manfred Cuntz, physics professor and lead author of the study.
1) Not to be confused with the Julian calendar, a Julian date or day number is the number of elapsed days since the beginning of a cycle of 7,980 years invented by Joseph Scaliger in 1583.
The purpose of the system is to make it easy to compute an integer (whole number) difference between one calendar date and another calendar date.
"Use of Planetarium software permits us to simulate the night sky more accurately on any date, past or future, at any location," said Levent Gurdemir."This is an example of how we are opening up the Planetarium to research into disciplines beyond astronomy, including geosciences, biology, chemistry, art, literature, architecture, history and even medicine." The Starry Night software demonstrated that in 570 B. 25, which would be the earliest date that the poem could relate to.
As the year progressed, the Pleiades set progressively earlier.
Recall that an isotope is a particular form of an element.
In radioactive atoms the nucleus will spontaneously change into another type of nucleus.
When looking at a large number of atoms, you see that a certain fraction of them will change or dating system because you can determine accurate ages from the number of remaining radioactive atoms in a rock sample.
There are several ways to figure out relative ages, that is, if one thing is older than another.
For example, looking at a series of layers in the side of a cliff, the younger layers will be on top of the older layers.