Podcaster: Steve Nerlich
Title: Dear Cheap Astronomy: Ep. 121: Black Holes Yet Again!
Organization: Cheap Astronomy
Links: http://cheapastro.com
Description: Cheap Astronomy finds can never be too many podcasts about black holes.
Dear Cheap Astronomy – What are squeezars?
Squeezars are stars that orbit supermassive black holes. Essentially they are stars on a slow death spiral into the black hole and the squeezing referred to is the tidal stretch being exerted upon them as the orbit closer and closer to the black hole’s event horizon. That tidal stretching heats them up, a bit like how the moon of Io, orbiting close to Jupiter is the most volcanically active body in the Solar System. So they are unusually hot and they are also unusually fast.
Dear Cheap Astronomy – Do black holes float in water?
Well, the internet says they do so it must be true. But let’s unpack this a bit. The internet also says that if you compress the Earth down to marble size it will become a black hole. This is true in a hypothetical sense, but actually compressing the Earth down to marble size is pretty much impossible. You could use some kind of gargantuan press to start the process, but once the Earth becomes denser than the material the press surfaces are made of, the press becomes useless.
Bio: Cheap Astronomy offers an educational website where you’re only as cheap as the telescope you’re looking through.
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Transcript:
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365 Days of Astronomy
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Until next time let the stars guide your curiosity!