Chances of me getting hit by satellite debris are 1 in 3200? Ummm… wrong
I haven’t been updating my blog for a while, but I came across this story in the NZ Herald and had to vent my frustration.
This quote in particular annoys me:
Experts say there is a one-in-3200 risk of the six-ton space junk hitting someone – considerably greater than the chances of winning Lotto, at just one in 3.8 million.
Now… that is a totally inaccurate and misleading comparison. The 1-in-3200 chance refers to the chance of *anyone in the world* getting hit by debris. The 1-in-3,800,000 chance of winning lotto refers to the chance of *one person in particular* winning Lotto. The chance of *anyone in the world* winning Lotto (which would be a fair comparison) is actually extremely high!
To put it a different way, to calculate the chances of *me personally* getting hit by debris, I have to multiply 3200 by the population of the world, which was about six billion last time I checked, so the chances of me personally getting hit by debris is 1-in-19,200,000,000,000. The chances of me personally winning Lotto is, as the article stated, 1-in-3,800,000. Therefore I am much more likely to win Lotto than to get hit by space debris.
But as they say, never let the truth get in the way of a good story, right NZ Herald journalists?
Here’s another quote from that article:
…though given more than three-quarters of the earth is covered in water, NASA is expecting a splash-down, rather than a smack-down.
Wow, so it took a NASA scientist to work out that because more than 75% of the earth is water, it’s more likely to land in water than land? AMAZING! Well done, NASA!
Seriously, who writes this stuff?