Full Idea
Absolute space, of its own nature without reference to anything external, always remains homogeneous and immovable.
Gist of Idea
Absolute space is independent, homogeneous and immovable
Source
Isaac Newton (Principia Mathematica [1687], Def 8 Schol)
Book Reference
Newton,Isaac: 'Philosophical Writings' [CUP 2004], p.64
A Reaction
This would have to be a stipulation, rather than an assertion of fact, since whether space is 'immovable' is either incoherent or unknowable.
Related Idea
Idea 17012 Time exists independently, and flows uniformly [Newton]