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In the 1960s, Bondi, van der Burg, Metzner, and Sachs (hence the acronym BMS) made an astonishing discovery that asomptotically – i.e. at infinity – space-time may possess an infinitelly richer symmetry structure than the known from the relativity theory and gravity theory Poincare group. However, the meaning and consequences of this result have only […]
Stellar magnifying glass Gravitational microlensing is a phenomenon in which a foreground star (“lens”) moves in front of a more distant star (“source”) seen from Earth. Gravity of the lens star works like a stellar magnifying glass, bending and amplifying the light of the background star. This brief brightening may disclose information about both stars […]
