Artists impression of an asteroid nearing the moonNASA/JPL-CaltechAsteroid 2024 YR4 is on a potential crash course with Earth, but theres a very slight chance the moon could take the hit.Based on current observations, there is a 2.1 per cent chance that the asteroid about as long as the Leaning Tower of Pisa is tall will crash into our planet on 22 December 2032. Although it is very likely to miss, a direct strike on a populated area would be catastrophic. But if it is in fact heading directly our way, new calculations show that there