To answer what gravitational waves are, we must travel back in time to 1916. This was the year famous physicist Albert Einstein published his general theory of relativity. Einstein had figured out how to explain gravity within the Universe using maths. Gravity is the force that keeps us on Earth and Earth orbiting around the ...
In new studies published in Physical Review Letters and a special issue of Classical and Quantum Gravity, a team of researchers presents the most precise test yet of the Weak Equivalence Principle, a vital component of the theory of general relativity. The report describes the final results from the MICROSCOPE mission, which tested the principle by measuring accelerations of ...
Scientists who study the cosmos have a favorite philosophy known as the “mediocrity principle,” which, in essence, suggests that there’s really nothing special about Earth, the Sun, or the Milky Way galaxy compared to the rest of the universe. Now, new research from CU Boulder adds yet another piece of evidence to the case for ...
JILA (Joint Institute for Laboratory Astrophysics) physicists have measured Albert Einstein’s theory of general relativity, or more specifically, the effect called time dilation, at the smallest scale ever, showing that two tiny atomic clocks, separated by just a millimeter or the width of a sharp pencil tip, tick at different rates. The experiments, described in ...
Another win for Einstein’s theory of general relativity. An international team of researchers led by the Instituto de Astrofísica de Canarias (IAC) has measured, with unprecedented accuracy, the gravitational redshift of the Sun, a change in the frequency of the lines in the solar spectrum that is produced when light escapes from the gravitational field ...
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