Are cell mutations always bad? A mutation is a change in the genetic material of an organism. We are made from trillions of cells, each with a nucleus composed of DNA â a set of instructions that tells the cell what to do. Cells copy themselves with astonishing accuracy, but every now and then a piece of code is copied incorrectly.
Seven eclipses occur in a minimum of 12 lunar months (about 354.37 days). Given that the calendar year is only about eleven days longer than 12 lunar months, the first of the seven eclipses has to come in early January for the seventh eclipse to occur before the end of the year.
Eclipses occur in groups of two or three within an eclipse season which lasts for 36 days. During this time any Full or New Moons occur as Lunar and Solar Eclipses respectively. An eclipse season occurs while the Sun is within eighteen degrees of one of the Moonâs Nodes, that is the points on the Moonâs orbital path where it crosses the path of the Sun. Eclipse seasons arise every six months. Eclipses are us!