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.
Eclipses occur due to the special coincidence of the moon and the Sun being the same angular size. The Sun is 400 times wider than the moon, but it is also 400 times farther away, so they coincidentally appear to be the same size in our sky. This is what allows us the phenomenal beauty of the total solar eclipse.
In Australia and eastern Asia, the eclipse will occur in late evening or near midnight local time, and this is where the moon will be highest in the sky. The year's next eclipse will be on the night of July 27, or the wee hours of July 28 depending on the time zone, and the center of the eclipse visibility region is on the Indian Ocean.