Episode 5, August 16, 2020

Need Strong Teeth? Blow Up A Star! @1:12

     A supernova in the galaxy M100 was a rare one–a calcium  supernova.  Though only a few percent of all supernovae are rich in this element, these provide 50% of universe’s supply.  Some of that ended up in our solar nebula…and human bones and teeth.  Wynn Jacobson-Galan of Northwestern University led a 70 person, multi-institution, multi-wavelength and telescope team investigating this ‘nearby’ fountain of calcium.

A Galactic Times Editorial on Changing Celestial Object Names @18:19

     NASA joined the culture wars this week, stating it would stop using names for objects which might be considered offensive.  But if you try to satisfy everybody you just might end up with more trouble than you can imagine!

InSight into Mars’ Insides  @23:41

     Early results from the single seismometer on NASA’s InSight lander confirm expectations of the sizes of crust, mantle and core of Mars, using a unique method—seismic waves of random noise.  Dr. Alan Levander of Rice University explains how.

Skies Over Earth for August 19th through 31st  @46:22

     The Moon, from New to Full, takes us through the skies of the second half of August.  Similarly, we follow a moon halfway through its orbit for each of Jupiter and Saturn, getting estimates of their orbital periods.

{Next Episode will include some US Labor Day special segments–Unusual Astronomers with Unusual Astronomy Jobs.}

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