Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org

Today's 2 topics:

- The surface of our Moon and the more than 100 impact craters on Earth testify to the fact that celestial collisions are very rare but not impossible.

- What caused Asteroid 2013 UQ4 to turn into comet C/2013 UQ4 & have an orbit so different from most of the rest of the members of our solar system?

 

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