Cranberries Cause Dark Stool

Confirm Italian Relativity

Albert Einstein

Since it was announced in 1915, the Theory of Relativity has been continually subjected to testing, always successfully overcome (see also Einstein's theory takes the challengers at bay ).

This attitude of science is often frainteso (talvolta in malafede) da sostenitori della pseudoscienza e crackpot vari. Secondo costoro la Relatività (o la Meccanica Quantistica, l'Evoluzionismo, ecc.) sarebbero sottopostte a questo fuoco di fila perché non considerate "vere". In realtà questo atteggiamento scettico è ciò che rende affidabili le previsioni scientifiche. Al di la di qualunque speculazione, quello che contano sono i riscontri e le misurazioni e le verità scientifiche sono sempre tali ... fino a prova contraria.



L'ultimo esame superato dalla centenaria Teoria di Einstein è stato predisposto da scienziati italiani.

precession of the perihelion of Mercury
(emphasized)

The very first experimental confirmation of relativity came in 1915 when Einstein's theory was able to accurately predict the amount of precession of the perihelion of Mercury.

Kepler's first law tells us that the orbit of a planet is an ellipse with the Sun at one focus. The point at which the planet passes closest to the Sun is called perihelion (and aphelion when it passed the farthest).

The orbit of a planet is, however, disturbed by the effect of gravity the other planets. In particular, the perihelion of Mercury (the closest planet to the Sun) behaves as shown above. In practice, the axis of its orbit around the Sun rotates slowly, so that every year at perihelion, the planet passes a bit 'before.

using classical physics you can not justify a precession of 5557 seconds of arc per century. Observations show, however, that this advance is 5600 seconds of arc, or 43 "per century more than expected. It seems little, but it was a quantity previously measurable (and measured) in the early twentieth century. Until that moment no one was been able to fully explain this phenomenon. Someone had even suggested the existence of a planet - never seen - even inside of Mercury. The Theory of Relativity Einstein's perfectly justified in those 43 seconds of arc more.

David Lucchesi and Roberto Perotti, Institute of Physics of Interplanetary Space (IFSI / INAF, Rome), have verified the relativistic precession of the satellites in orbit around the Earth.

The satellite LAGEOS I

They did this by using the orbital data collected in thirteen years of operation of the satellite LAGEOS II (Laser Geodynamics Satellite ).

The mass of the Earth is 330 000 times smaller than that of the Sun, and LAGEOS rotates around our planet, 8 times more slowly than Mercury does not face around our star. Relativistic effects for low speeds and masses (relatively) small, almost imperceptible, but the orbital data of LAGEOS II were obtained with a very precise laser ranging system. The mirrors are installed on the satellite retroreflectors (practically the reflectors), similar to those left by the Apollo missions to the moon with great precision capable of putting a laser beam at the source that issued it. By measuring the time taken by light to go back, you can determine very accurately the distance of the satellite.

The discrepancy observed between measurements and theoretical predictions was 0.2% (ie, the theoretical data coincide with the experimental ones at 99.8%).

Well, Einstein was right again!

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Insights:

• Einstein right again (INAF)
• The orbit of Mercury and Relativity (ISAS);