This is a lesson about the atronomy, because this is my first post and i am staring with universe starting! so we can go to lesson,
Still now the universe is very risk to understand and a major project to discover a lot. we can't prove that how the universe was creat! but we can guess about the universe. the american astronomer of Mr.Carl Sagan compared the universe with a calender year. that is called Cosmic calender. and cosmic calender is below,
The galaxies are formed over first nine months and the earth appears in september. that means the raising of galaxies are very long time.
Earth's life in a year,
1 Jan (midnight) - Big Bang - Universe Forms
15 mar - First stars and galaxies form
1 May - Milky way galaxies forms
8 Sep - Sun forms
9 Sep - Solar System forms
12 Sep - Earth forms
13 Sep - Moon forms
20 Sep - Earth's atmosphere forms
01 Oct - Earliest life on earth
07 oct - Earliest Fossils
18 Dec - First many celled life forms
19 Dec - First fish
21 Dec - First land plants
23 Dec - First reptiles
24 Dec - First Dinosaurs
26 Dec - First mammals
27 Dec - First birds
28 Dec - First Flowering plants
28 Dec - Dinosaurs extinct
31 Dec (11:55) - humans born
last day
11:59.50.487 pm - Great pyramid is built
11:59.55.333 pm - Great wall of china is built
11:59.56.785 pm - Roman Empires falls
11:59.58.026 pm - Battle of Hastings
11:59.58.921 pm - Columbus lands in America
11:59.59.874 pm - World war 2 ends
11:59.59.891 pm - Mount everest is climbed
11.59.59.924 pm - Man lands on the moon
Midnight - Today
That's all. it is just a comparison!
