The Sirius B hoax was extremely successful for more than 50 years - as a result, Divine Albert's Divine Theory was firmly established and all opposition was crushed - but this hoax had to be abandoned in the end. Precise measurements made in the 60s by Jesse Greenstein, J.Oke, and H.Shipman showed that Divine Albert's Divine Theory offers predictions that deviate from the real values by a factor of four. So by the middle of the 20th century there was an urgent need for a measured gravitational redshift gloriously confirming Divine Albert's Divine Theory. Pound and Rebka provided it:
http://einstein.stanford.edu/content/relativity/a10758.html "What proofs are there for general relativity? So far, GR has made the following specific predictions: (...) 3...Clocks run slower in strong gravitational fields. This was confirmed by Robert Pound and George Rebka at Harvard University in 1959, and by Robert Vessot in the 1960's and 70's using high-precession hydrogen maser clocks flown on jet planes and on satellites."
The Pound-Rebka hoax successfully devastated physics for another 50 years and made Divine Albert's Divine Theory absolutely invincible. So nowadays Einsteinians can even tell the truth (no danger at all), and the truth is that the Pound-Rebka experiment in fact confirmed Newton's emission theory of light:
http://www.einstein-online.info/spotlights/redshift_white_dwarfs Albert Einstein Institute: "One of the three classical tests for general relativity is the gravitational redshift of light or other forms of electromagnetic radiation. However, in contrast to the other two tests - the gravitational deflection of light and the relativistic perihelion shift -, you do not need general relativity to derive the correct prediction for the gravitational redshift. A combination of Newtonian gravity, a particle theory of light, and the weak equivalence principle (gravitating mass equals inertial mass) suffices. (...) The gravitational redshift was first measured on earth in 1960-65 by Pound, Rebka, and Snider at Harvard University..."