[1] He was influential in the development of the first redshift surveys, and was an early proponent of crewed space astronomy, conducted at a proposed Moon base for example.
In retirement, he was a principal scientist with The Scientific Association for the Study of Time in Physics and Cosmology (SASTPC).
Tifft's results were supported by Martin Croasdale, who claimed the effect to be statistically significant and the same over the whole sky,[7] and later Napier and Guthrie.
[8] Since the initial publication of these results, Tifft's findings have been used by others, such as Halton Arp, in making an alternative explanation to the Big Bang Theory, which states that galaxies are redshifted because the universe is expanding.
Tifft himself, when interviewed for the popular science magazine Discover in 1993, stated that he was not necessarily claiming that the universe was not expanding.