It helps to keep things in perspective. On June 14, the Earth apparently came within only 75,000 miles of a catastrophic collision with a peice of space rock the size of a soccer field. The BBC has the details. If 75,000 miles seems like a long way consider this: The Moon is more than three times that far away: 240,000 miles. Had this bit of rock actually hit the planet, the result would have been something like what happened in Siberia in 1908, when an asteroid of similar size flattened 2,000 square miles of forest land. Scarier yet is the fact that astronmers only detected in three days after it had passed us by.