"Sometimes when this place gets kind of empty
 Some of the breath fades with the light
 I think about this loveless fascination
 Under the milky way tonight"
— The Church

I work out of our office on One Market Street in San Francisco. My standup-desk is right across from our Gallery at One Market. One of our newer exhibits is called Powers of Design. It was first featured at the Technology Entertainment & Design (TED) conference last year. Powers of Design depicts the size of everything from the inconceivably small to the mind-blowingly large. I thought I'd cover the exhibit elements, one at a time, over a few months. I started small and am working my way up.

10²² MAGNITUDE
1,000,000,000,000,000,000,000 m
100,000 Light-years

The Milky Way

120,000 Light-years

Time for something you’ve actually heard of. The Milky Way is the galaxy containing our solar system, with Earth two-thirds of the way out from its center. Nearly 120,000 light-years in diameter and containing 200–400 billion stars, the galaxy probably contains at least as many planets, 10 billion of which could be in the habitable zone of their parent star.

If our solar system were the size of a quarter, the Milky Way would be equivalent to India. Being 13.2 billion years old (nearly as old as the universe), it’s safe to assume the candy bar was named after the galaxy and not vice versa.

Growing up, when someone said Milky Way, here's what came to mind.

I was only off by a few orders of magnitude.

Thanks to Global Content Manager, Matt Tierney, for the images and text that comprise the exhibit element. This is just one of the many exhibits in the gallery at One Market in San Francisco. The gallery is open to the public on Wednesdays from 12 pm to 5 pm, and admission is free. Visit us.

Previous posts on this topic include:

• 10^-15 Protons and Neutrons
• 10^-14 Atomic Nucleus of a Uranium Atom
• 10^-13 Nada, Zilch, Zero, Zip
• 10^-12 Gamma Rays
• 10^-11 Fluorine Ion
• 10^-10 Wavelength of Hard X-Rays
• 10^-9 Carbon Nanotubes
• 10^-8 Molecular Transport Nano Robot
• 10^-7 HIV Virus
• 10^-6 Red Blood Cells
• 10^-5 Sand
• 10^-4 Microelectromechanical Systems
• 10^-3 Sonata Silicium Watch Components
• 10^-2 Lego
• 10^-1 Prosthetic Fairing
• 10⁰ Biome Concept Car
• 10¹ Ma'erkang Housing Reconstruction
• 10² Shanghai Tower
• 10³ Bay Bridge
• 10⁴ Masdar City
• 10⁵ Palm Islands
• 10⁶ The Moon
• 10⁷ Earth
• 10⁸ Jupiter
• 10⁹ The Sun
• 10¹⁰ Distance Light Travels in 34 Seconds
• 10¹¹ Distance from Jupiter to the Sun
• 10¹² Distance from Pluto to the Sun
• 10¹³ Voyager 2
• 10¹⁴ The Solar System
• 10¹⁵ Cat's Eye Nebula
• 10¹⁶ Pillars of Creation
• 10¹⁷ Great Orion Nebula
• 10¹⁸ M15 Globular Cluster
• 10¹⁹ Sagitarius Dwarf Galaxy
• 10²⁰ Trangulum Galaxy

Future blog posts will cover:

• 10²² IC 1101
• 10²³ Local Group of Galaxies
• 10²⁴ The Local Supercluster
• 10²⁵ 3C 273
• 10²⁶ Outer Limit of the Universe

Measurement is alive in the lab.