The discussion confirms that Earth cannot be classified as a black hole due to its ability to reflect light, which is a fundamental characteristic that distinguishes black holes. Key references include the concept of the Schwarzschild Radius, which indicates that for Earth to be a black hole, it would need to be compressed to a radius of approximately 9mm. Theoretical frameworks such as black hole thermodynamics and the holographic principle were mentioned but ultimately do not support the notion of Earth being a black hole. The consensus among participants is that Earth's physical properties, as defined by general relativity, do not align with those of a black hole.
PREREQUISITESAstrophysicists, physics students, and anyone interested in the fundamental properties of black holes and their distinction from terrestrial bodies.
No. Earth reflects light. Black holes don't, since light can't escape from them. EDIT: See e.g. Measuring Earth's Albedo.DIGBY STILLS said:is it possible Earth is a black hole
And this appearance of reflection couldn't be part of the encoding? I promise I'm not being flippant. Susskind explains that to the person entrapped beyond the threshold of the black hole, all seems fine. Outside the event horizon, all seems lost, but within it, there is no change. At least not initially. Is it possible that from here, we see things as they would normally seem as the information is encoded on the surface? I know. Funny questions.DennisN said:No. Earth reflects light.
I know what you are talking about, black hole thermodynamics and the holographic principle. The holographic principle is theoretical physics. But I address your question from a more practical viewpoint:DIGBY STILLS said:Susskind explains that to the person entrapped beyond the threshold of the black hole, all seems fine.