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It's an exciting time for the fields of astronomy, astrophysics, and cosmology. Thanks to cutting-edge observatories, instruments, and new techniques, scientists are getting closer to experimentally verifying theories that remain largely untested.
However, between the 1960s and 1990s, observations of the rotational curves of galaxies and the expansion of the Universe gave rise to new theories regarding the nature of gravity over larger cosmic scales. On the one hand, scientists postulated the existence of Dark Matter and Dark Energy to reconcile their observations with GR.
For their latest study, Turyshev and his colleagues investigated how a series of spacecraft flying in a tetrahedral formation could investigate the Sun's gravitational field."These deviations are hypothesized to manifest as nonzero elements in the gravity gradient tensor , fundamentally akin to a solution of the Poisson equation.
The mission, said Turyshev, would employ local measurement techniques that rely on a series of interferometers. This includes interferometric laser ranging, a technique demonstrated by the mission, a spacecraft pair that relies on laser range finding to track Earth's oceans, glaciers, rivers, and surface water.character of atoms to measure the difference in phase between atomic matter waves along different paths.
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