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#398: Apollo Queries & the Chill of the Cosmos: Unraveling Spacecraft Skips and Absolute Zero

#398: Apollo Queries & the Chill of the Cosmos: Unraveling Spacecraft Skips and Absolute Zero

Space Nuts: Astronomy Insights & Cosmic Discoveries vor 2 Jahren

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20:30

Prepare to embark on an interstellar Q&A adventure in this
enlightening episode of Space Nuts, where your cosmic guides,
Andrew Dunkley and Professor Fred Watson, tackle the perplexing
questions from the far reaches of our listeners'
imaginations.

First, we join Ash from Brisbane as he ponders the enigmatic
mechanics of spacecraft reentry. Using Apollo 13's nail-biting
descent as a springboard, Fred demystifies the concept of 'bouncing
off the atmosphere' and reveals the delicate balance between
gravitational pull and atmospheric drag.

Next, Darryl from South Australia challenges us with the icy
extremes of absolute zero. Why does this ultimate chill exist, and
is there a corresponding 'absolute hot'? Fred delves into the
physics of temperature and the motion of atoms, shedding light on
the limits of the thermal universe and the possibility of an
'absolute heavy' or 'absolute light'.

Finally, Alex from London, by way of Indiana, brings us
face-to-face with the enigma of dark energy. Is this mysterious
force the antithesis of gravity itself? Our hosts explore the
repulsive power that's pushing galaxies apart and the ongoing quest
to unravel the secrets of the cosmos.

With each question, Andrew and Fred illuminate the wonders and
oddities of the universe, blending humor with profound scientific
insight. So, join the Space Nuts community, submit your own cosmic
queries, and keep the spirit of discovery alive!

For more space-time odysseys and answers to your astronomical
inquiries, subscribe to Space Nuts on your favorite podcast
platform. Until we venture again into the vast unknown, keep your
gaze to the stars and your curiosity alight!

Episode Chapters

(00:00) Welcome to Space Nuts: Astronomy and Space Science

(02:10) Ash from Brisbane questions the 'bouncing off the
atmosphere' during spacecraft reentry

(10:45) Darryl from South Australia inquires about absolute zero
and the limits of temperature

(17:30) Alex from London asks if dark energy could be considered
antigravity

(25:15) Closing remarks and how to submit your questions to Space
Nuts

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