The Rosetta Project … like throwing a dart from Sydney to Perth and hitting the bullseyeNovember 28, 2014
Many commentators in Australia claimed that the Philae landing was:
This is equivalent to hitting the bullseye of a dartboard in Perth from Sydney. With a billion euro ($1.4bn) dart. While blindfolded (as the mission was powered down for almost the entire journey). ABC The Drum
Did they get the maths right?
Inner bullseye of dartboard = 12.7 mm
67P comet = 4.1 km = 4,100 m at widest point
Distance comet from earth = 520 million km
Actually, hitting the 67P comment was more like roulette as the Rosetta mothership swung into orbit. And, as the earth and the comet are moving, the distance constantly changes, but you can watch the distance changing here.
In the Dart Throwers Universe
We will assume someone can stand on earth and throw a dart at the comet … Yes! They would need very big triceps.
So the commentators aren’t even close. It would still be a feat hitting a bullseye with a dart from 160km, but that would be from Sydney to, um, Nowra on the coast.
The distance from Sydney to Perth is 4100 km. At best the commentators would be talking about throwing a dart from Brisbane to Adelaide is 2044km (below).