Travelers in the Night Eps. 253 & 254: Dancing With Earth & Colliding Planets

The 365 Days of Astronomy

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 Moon is the Earth's long time dancing partner. This unequal pair revolve about a teeter totter type balance point which in turn orbits the Sun every 365 and a quarter days. A small asteroid has become a third partner in the Earth-Moon dance.

- Collisions between planets, planetesimals, asteroids, and comets have produced the place where we live and breathe.Today scientists are replacing myths with solid evidence that violent impacts between planets, planetesimals, asteroids, and comets are very common in our galaxy. They play a vital role in the formation of solar systems which contain habitable planets.

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