Some Perspective From the Past

Some Perspective From the Past 1

I found this on my old blog, originally published on February 20, 2006 Monday, February 20, 2006 The sun’s diameter is 1,390,000 km. and its mass is 1.989*10^30 kg. There are 100,000,000,000 stars like it in our galaxy. There are at least 100,000,000,000 galaxies in the observable universe. The universe is somewhere between 10,000,000,000 and […]