There are about 100 billion stars in our galaxy.
That’s 100,000,000,000 * ‘s.
By the way, the number of cells that make up one adult human body is roughly 37,200,000,000,000. That’s 37.2 trillion highly complex, cooperating cells.
According to William Atkinson’s Nanocosm, published in 2003, all this goes to say that
You, reader, exist in finer detail than all the stars and nebulae in the Local Galactic Group. Your structure and function are more complicated; at any given instant your body hosts a greater range of chemical events than all the visible stars.
What’s more, is that we experience the complexities of the physical world with mediocre resolution. The senses we are born with do not allow us to examine the nanostructures of iridescent butterfly wings or perceive scratches on the surface of the international space station without an external aid. Sensorily-speaking, we occupy a middle ground between small-scale physics and large-scale physics.
Below [this] middle kingdom, which we measure in yards of meters (40 inches), a series of subworlds exists in nested shells. Each subworld embodies an alternate reality. A scale of millimeters brings us to the world of the insects. These mobile computers (the insects) are perfectly adapted to the intricate ecosystems they occupy, from lawns and trees to walls and mattresses. Drop down a notch and you enter the world of the micrometer or micron, a unit of length that is one thousandth of a millimeter. This subworld is, literally, the microcosm. It is a the world of the cell–autonomous units such as amoebas and zooplankton, as well as specialized “social” populations that make up skin, bones, and brain.
Below the microcosm comes creation on the scale of the nanometer, one millionth of a millimeter. I call this the nanocosm. It is a finely detailed, completely structured cosmos, or organized universe, that exists around and within us. All that is–microbes, humans, planets, stars, totality–is built up from the nanocosm, atom by atom. This subworld is as varied and complex as any other level of being: a place unto itself. Its rules are neither those of galaxies nor those we see within the middle kingdom. This simple truth has puzzled many a would-be nanotechnology.
For more, check out Nanocosms by Wiliam Illsey Atkinson.
Other sources referenced in this post: