Episode 1, June 20, 2020

The Sounds of Stellar Cannibalism–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 caught one in the act.  And in a first, The Galactic Times had her take her data and turn the explosion of energy and X-rays into a sound file so we can here five weeks of celestial fireworks as 30 seconds of music!

Mars and Its Chameleon –The Moon That Thinks It’s a Ring  @16:40
     Did you know that Mars used to have a ring?  Dr. Matija Cuk of the SETI Institute shows how Phobos has at least a half-dozen times metamorphosed itself into and out of being a ring because of Mars’ tidal forces, and the outer moon Deimos.

Drawing Blinds Over the Universe  @34:47
     Drs. Patrick Seitzer of the University of Michigan and James Lowenthal of Smith College discuss the ramifications onto astronomy of mega-constellations of satellites, notably the proposed 100,00s belonging to StarLink and OneWeb, and others, on astronomy.  How these can put million dollar observatories out of operation, destroy whole areas of astronomical research, and what astronomers are trying to do, with some cooperation from at least StarLink.

Editorial–What Happens When 100,000 Satellites Go Obsolete? @55:20
     What will happen when there are 100,000 satellites, including StarLinks from SpaceX, making it impossible for observatories to view the universe, just so you can stream Netflix and view your social media from anywhere.

The Galactic Skies from June 20th to June 30th.  @58:01
     We start our time with the Solstic, which also includes a solar eclipse across central Africa, and the Sun then entering Gemini.  The eclipse is partial in parts of Europe and Asia but not a trace to be seen in the Americas. The northern hemisphere’s latest twilight and sunsets’s are this week.  The planets are split between Jupiter and Saturn rising after Sunset, and Venus reappearing in the dawn sky after rounding past the Sun from the evening.  Mars appear between midnight and dawn.

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