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FROM QUANTUM TO UNIVERSE. “At the same time, with the development of astronomical observation technology, many puzzling astronomical phenomena have been discovered.” https://lnkd.in/dATr5iE7 View in LinkedIn

HABITUATED CRECRUSTING. “Each morning you have to break through the dead rubble afresh so as to reach the living warm seed.” (Wittgenstein, Culture and Value) https://lnkd.in/drRgGV2f View in LinkedIn

PERHAPS the finest of ancient Greek coins, Arethusa on a Syracuse Dekadrachm from around 400 BC, on display at Musée d'art contemporain in Lyon, France. View in LinkedIn

SO ENDS this remarkable essay on the nature of the ether, a concept that simply has not succeeded in being killed. Once consider a type of superstitious fudge factor with roots in alchemy and phlogiston, the idea of space being empty has not been accepted, and redefinitions of the ether idea -- space as sone type of liquid in which things like light and magnetism are propagated -- continue to arise. This is one of the more imaginative theories. https://lnkd.in/dATr5iE7 View in LinkedIn

THE JOURNEY MATTERS. “In trying to put together observations, hypotheses, and full-fledged theories, I could often see the trees but not the forest. I did not try to erase the footprints of my beating around the bush, because I believe the search is no less instructive than its eventual results, especially when the undertaking is still underway.” (By the late Professor Marcelo Dascal, at Tel Aviv University). https://lnkd.in/dKNrQwQw View in LinkedIn

ASSUMPTIONS. “We must assume that space is composed of some special particles, and there is no energy transfer between these particles.” https://lnkd.in/dATr5iE7 View in LinkedIn

QUANTUM FIELD. “As long as enough energy is provided, physical particles can be excited out of space and, in turn, the concepts of quantum field and vacuum energy have been put forward.” https://lnkd.in/dATr5iE7 View in LinkedIn

THE PRICE OBSERVATION. “But as soon as the negative and positive masses differ even slightly in absolute value, the composite system always falls with exactly the same acceleration, respecting again the principle of equivalence: although the overall (inertial) mass of the system has decreased —it is equal to the algebraic sum of the two masses of the bound system—the trajectory of the composite system remains the same.” https://lnkd.in/daA2SgMy View in LinkedIn

LEVITATING ANTIMASS. “Richard Price noticed an extremely surprising property: whereas a negative mass falls exactly like a positive mass when it is without interactions, the bound system composed of a mass +m and a mass −m, equal and opposite, levitates and polarizes itself (Fig. 2), the negative mass lying slightly above the positive mass in the levitating system.” https://lnkd.in/daA2SgMy View in LinkedIn

TEST OF ANTIGRAVITY. “If antimatter antigravitates, then, depending on the composition of the body used to test the equivalence principle, for example beryllium and uranium, two elements with rather different binding energies, these bodies should follow different trajectories in gravitational fields.” https://lnkd.in/daA2SgMy View in LinkedIn