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Einstein’s light cone and five-dimensional spacetime.
“Light cone in 2D space plus a time dimension, more commonly referred to as ‘space time’” (Wikipedia) The light cone introduces the model. T...
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"This artist’s concept depicts the central region of the blazar BL Lacertae, a supermassive black hole surrounded by a bright disk and ... -
"The Universe’s most abundant ice isn’t formless—it’s secretly laced with crystals. And that might change how we think about water, pla... -
“Timing delays in quasar light bent by massive galaxies offer a fresh way to measure the universe’s expansion, and the results deepen the ri...
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