Planetary Orbits, Cosmic Expansion & The Nature of Nothing | Space Nuts Q&A

Planetary Orbits, Cosmic Expansion, and the Nature of
Nothingness In this thought-provoking Q&A episode
of Space Nuts, hosts Andrew Dunkley and Professor Fred
Watson tackle a diverse array of listener questions that delve into
the intricacies of our universe. From the stability of planetary
orbits to the enigmatic concept of nothingness before the Big Bang,
this episode promises to enlighten and intrigue.
Episode Highlights:- Planetary Orbits vs.
Energy: Justin from Melbourne asks how planets maintain
stable orbits around the sun without spiraling inwards. Andrew and
Fred explore the negligible forces at play in interplanetary space,
discussing the stability of planetary dynamics and the historical
migrations of planets within the solar system.
- Expansion of Earth: Larry questions whether the
Earth is expanding along with the universe. The hosts clarify that
while space itself is expanding, the forces that hold the Earth
together, such as gravity, prevent any significant changes at a
local scale.
- The Concept of Nothingness: Mike from the UK
raises a philosophical query about what existed before the Big
Bang. Andrew and Fred discuss the implications of time and
existence, examining the idea that time itself may have begun with
the Big Bang and the theories surrounding this profound
mystery.
- Projectiles in Space: Giles presents a
fascinating "what if" scenario regarding the accuracy of firing
solid metal projectiles from orbit. The hosts analyze the
challenges of targeting and the influence of atmospheric
conditions, drawing parallels with historical warfare and modern
technology.

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stellar insights and cosmic wonders. Until then, clear skies and
happy stargazing.

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