# How expensive is everything on earth

## How much is the earth actually worth?

### Astronomically high replacement value

One thing should be said right from the start: the earth is the most valuable of all planets. Surpirse! And the American astronomer Greg Laughlin has even made it more concrete: According to his calculation, our earth is a proud five quadrillion US dollars (for fun, let's spell it out: 5,000,000,000,000,000) value. So that's how much a planet costs on which humans can survive. The following applies: Je more habitable, the more valuable.

The Mars is therefore a real bargain by the way: The costs for our red neighboring planet should be somewhere between \$ 14,000 to \$ 16,000 level off. Terrestrial planets discovered so far are not particularly valuable, by the way. For example comes Gliese 581c just to a value of about \$ 158.

In Greg Laughlin's calculations with a complicated formula for earth-like planets Among other things, the mass of the planet, its distance to the sun and the temperature on the surface are included. In fact, he didn't just calculate it out of boredom, because behind this is the purely practical problem that astronomers have to choose those from the multitude of Earth-like planets that have been discovered that are worth further exploration.

### And what about our moon?

Now please don't be disappointed: The moon is practically worthless. The scientist Chuck Magee has for the the loyal earth companion is worth 7x10 to the power of -25 US dollars determined. For comparison, 10 to the power of -2 is \$ 0.01. But with our moon we are still well served. Because Jupiter's moon Europa only has a value of 7 × 10 to the power of -47 US dollars. And Titan, Saturn's moon, only comes in at 9.5 × 10 to the -44 US dollars. So basically nothing. We can count ourselves more than lucky with our earth and its moon.