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“This can play a very good role in some basic physics research, such as non-Newtonian gravitation and gravitational redshift” research, he said.

Twenty-four years of observations of the S-02 star showed that its gravitational redshift — seen when gravity stretches light to a longer, redder wavelength — is just as predicted.

This causes a shift to the red end of the electromagnetic spectrum, a gravitational redshift.

The study, relying heavily on data from the Keck Observatory in Hawaii, focused on an effect called gravitational redshift.

This time dilation is known as gravitational redshift.