But that doesn’t mean they’re easy to remember individually. It’s one thing to know that G, the gravitational constant, represents the strength of attraction two objects feel for each other due to gravity. It’s another to recall that the actual value is 6.673 x 10–11 N m2/kg2. The story featured various “trading cards” to help visually accent each important number, but they also displayed vital information for each, including their often unwieldy values.
Below, you can print out personal versions of each of these cards for your own use. We hope you enjoy them, whether they become an oft-used resource to remember the facts, a beautiful way to illustrate the universe’s constants, or just a handy reminder of all that astronomy has taught us.