Hi Hilmar,
This may explain why earth seems to be gaining in velocity, rather than slowing down. Perhaps a black hole is attracting us towards its gravitation pull.
It is though that black holes are consuming matter within the universe. Black holes cannot be seen, because even light is caught within a black hole's gravitation pull and compacted into its matter. Since the strength of an object's gravitation pull is related to its mass, black holes would be continually gaining in gravitation pull strength as they consumed more and more matter.
Although black holes may be relatively small in their dimensions in comparison to their mass, they might contain a tremendous amount of matter.
If matter is being consumed by black holes, and compacted into tiny object in comparison to their mass, what takes the place of the matter that previously occupied space within it normal dimensions of the universe. It may be that the universe is shirking as matter is pulled into black holes.
Regards,
LelandJ