An observer situated in a nebula and moving with the nebula will observe the same properties of the universe as any other similarly situated observer at any time.
Hermann BondiThe true contrast between science and religion is that science unites the world and makes it possible for people of widely differing backgrounds to work together and to cooperate. Religion, on the other hand, by its very claim to know โThe Truthโ through โrevelation,โ is inherently divisive and a creator of separatism and hostility.
Hermann BondiWhat I remember most clearly was that when I put down a suggestion that seemed to me cogent and reasonable, Einstein did not in the least contest this, but he only said, 'Oh, how ugly.' As soon as an equation seemed to him to be ugly, he really rather lost interest in it and could not understand why somebody else was willing to spend much time on it. He was quite convinced that beauty was a guiding principle in the search for important results in theoretical physics.
Hermann BondiThe scientist โฆ must always be prepared to deal with the unknown. It is an essential part of science that you should be able to describe matters in a way where you can say something without knowing everything.
Hermann BondiThe landscape has been so totally changed, the ways of thinking have been so deeply affected, that it is very hard to get hold of what it was like beforeโฆ It is very hard to realize how total a change in outlook Isaac Newton has produced.
Hermann BondiOn the most usual assumption, the universe is homogeneous on the large scale, i.e. down to regions containing each an appreciable number of nebulae. The homogeneity assumption may then be put in the form: An observer situated in a nebula and moving with the nebula will observe the same properties of the universe as any other similarly situated observer at any time.
Hermann Bondi