U is for Universe: #atozchallenge

Infinitesimally tiny we are. It would take 59,520 people stacked standing upright to reach outer space. If you stacked that many ants atop each other it wouldn’t be the size of a human. It would be 200 feet tall. We are closer in mass to that of a single atom than we are to the size of the Earth. The entire human population can fit comfortably inside Texas.   As we expand outward we get even smaller.

1,300 Earths would fit in our solar system’s largest planet, Jupiter.
1,300,000 Earths would fit inside our sun.
Arcturus, the largest known star, is 26 times bigger than the sun.

Continue expanding outward and we see the solar system. Zoom out further we can see our Milky Way galaxy. Continue outward and our galaxy turns to a smudge as we see millions of other galaxies each with their own population of billions of stars. Continue still further and we see our known universe. There is no comparison between you and the Universe. 

10 to the power of 21. That is 10 to the 21st. 1021.  That is 10 with 21 zeros after it.

10,000,000,000,000,000,000,000 = 10 septillion. That’s the estimate on how many stars there are in the Universe. If you’re not familiar with Hubble’s “Deep Field” photograph, NASA pointed that famous telescope at a completely empty piece of sky. Over 10 days it collected this image that represents just 1/24 millionth of the night sky:

Two of those points of light are stars within our Milky Way. All the rest are galaxies. Yes, galaxies comprised of millions and millions of their own stars. 

How amazing is this? How amazing is it knowing that there is something so much larger than ourselves. Something so large we can’t possible begin to imagine the size and scope of it. Yet, being what seems to us, infinitely huge, it’s all made of the same stuff.

The five most populus elements in the universe are hydrogen, helium, oxygen, carbon, and nitrogen. Ironically, those are the same five most abundant elements here on Earth. We are not here and the rest of the universe out there. We are the Universe. We are made of stars.