The Galactic Times

The Galactic Times

Astronomy News, From Earth to the Ends of the Universe... Show More

Episodes

August 5, 2020 67 min

Episode 4, August 5, 2020

Over The Solar System's Horizon -- The View of Stars Beyond Pluto @1:12
     The New Horizons probe that visited Pluto a few years ago has now gone so far from Earth that some nearby stars have actually shifted positions in the sky, the first "alien" skies we have seen.  Dr. Tod Lauer of NOAO and the New Horizons team describes how they took photos of these 'star shifts' or parallaxes...

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Supernova in a Lab - Don't Try This At Home @1:14
     Explosive research!  In a Georgia Tech lab, a science team led by Dr. Devesh  Ranjan recreates the moment a star explodes in order to reproduce the swirls of gas seen in the most famous supernova of all time, the Crab nebula, which exploded this month 966 years ago.  Hear what their supernova sounds like!

Comet NEOWISE - What We've Learned, Where It Will Be @15:36
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A Star's Medical Report--How Betelguese Got The Chills  @1:14
     Orion's got two bright stars, blue Rigel and...what happened to red Betelgeuse??  The giant star faded dramatically over the past winter into a pale shadow of former self, altering the winter sky.  Sri Lankan astronomer Thivasha Dharmawardena, at the Max Planck Institute for Astronomy in Heidelberg, Germany explains how she and colleagues took the star...

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The Sounds of Stellar Canniballism--When a Pulsar Has Lunch  @1:12
     Pulsars aren't always due to supernovae.  Sometimes that clockwork radio signal is due to hotspots on rotating neutron stars caused by infalling gas from a companion star.  And when that happens, the pulsar "powers up."  Usually astronomers miss the actual start of the power up but Adelle Goodwin, of Monash University, Australia, and her team cau...

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