2 more questions

Q: Will an asteroid hit Earth, wiping out the population? How big was the asteroid that destroyed the dinosaurs?

A: The asteroid that killed the dinosaurs was about 6 miles wide. In the year 2182, an asteroid called 1999 RQ36 is very likely to hit Earth. It has a 1 in 1,000 chance of hitting. That's actually a pretty big chance. The asteroid is  about 1,837 feet across. There is an asteroid called Ceres that is about 22 miles wide. It is the biggest asteroid that we have found. Ceres will NOT hit Earth. Another asteroid, Toutatis, is 3 miles wide and weighs 5,500 million pounds. It was supposed to hit Earth, but it didn't. Apophis is an asteroid that is about 1,065 feet long. It was going to hit Earth in 2036, but it didn't pass through an area in space called the keyhole. If it did, it would hit Earth. 1999 RQ36 is probably the most likely asteroid to hit Earth. We will all be dead by 2182, though.


Q: How hot is a nuclear explosion?
A: A nuclear explosion is over 10 million degrees Kelvin. The center of the Sun is 10 million degrees Kelvin, too.