Archive for December, 2012

Universe, Earth, and Life on Earth

Universe Age: 13.72 billion years Number of Galaxies in Universe: 170 billion Number of Stars within a Galaxy: 10 million (10**7) to 100 trillion (10**14) Total Number of Stars in Universe: 17 x 10**17    to    17 x 10**24 Formulation of The Milky Way: 13.2 billion years ago Formulation of our Solar System: 4.568 billion years […]