APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
What would radiation levels be like on a planet near the center of a globular cluster? Would there be constant auroras on such a planet? Would the planet be hospitable to life as we know it? Oceans would provide some protection, but would land-based complex life forms be exposed to high levels of radiation?
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Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
The light levels at night would be comparable to that of a full moon.Zuben L. Genubi wrote:
What would radiation levels be like on a planet near the center of a globular cluster? Would there be constant auroras on such a planet? Would the planet be hospitable to life as we know it? Oceans would provide some protection, but would land-based complex life forms be exposed to high levels of radiation?
Each planet would exist in a honeycomb of heliospheres and receive its aurora solely from its own local sun.
Art Neuendorffer
Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
Another Fine Choice...starsurfer wrote:How about renting a scope in Chile?Boomer12k wrote:Awesome... too bad I am not in the southern hemisphere... but then I CAN rent a scope in Australia, I suppose...hmmmmmm.....
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Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
Thanks for setting me straight, Chris!Chris Peterson wrote:Photons. Particles with a rest mass of zero and a certain momentum (or energy).Ann wrote:Photons. Massless particles of a certain wavelength.Chris Peterson wrote: We have a very, very good idea what light is.
Ann
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Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
I’d agree that light can be described and its characteristics are well known but its quantum nature doesn’t behave like anything familiar to us in our everyday experience. To have to explain a photon as an “epiphenomenon” begs for a primary description not requiring a PhD to comprehend or explain.
Yes, I’d agree light is better understood than I stated but would hope light's duality could be shown pragmatically.
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Re: APOD: Star Cluster NGC 362 from Hubble (2017 Oct 11)
You are falling victim to the Billiard Ball Fallacy: the belief that the Universe should work in a way we find intuitive (like the way the balls move on a billiard table). In fact, the Universe is under no such obligation. At both large and small scales, it behaves in a way that is different from the scale our brains and senses evolved to operate at.Fred the Cat wrote:I’d agree that light can be described and its characteristics are well known but its quantum nature doesn’t behave like anything familiar to us in our everyday experience. To have to explain a photon as an “epiphenomenon” begs for a primary description not requiring a PhD to comprehend or explain.
Yes, I’d agree light is better understood than I stated but would hope light's duality could be shown pragmatically. :ninja: :arrow: :ssmile:
The theory, which we understand very well, offers no difficulty with particle-wave duality at all. Thus, we understand this part of the Universe. That it seems odd is really of no consequence.
Chris
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