Minas Astronomy Group — April meeting
Saturday, April 20, 7 p.m.
(delayed a week because of weather)
Avonport, 475 Bluff Road
Topic: Rocks from the Sky
Small, Large — Good, Bad
Speaker: Roy Bishop
Earth itself is composed of rocks from the sky. Presently millions of such bodies are still in the sky, several tonnes of which land on Earth every day. Occasionally one of these is large enough to make headlines, such as the Chelyabinsk meteor this February. Large visitors to the inner Solar System that reach naked-eye visibility, such as Comet Panstarrs, also make the news every few years. The geologic record makes it virtually certain that some of the large objects still out there have Earth’s name on them. Whether or not we can prevent them from impacting Earth depends . . . .