It was expensive lesson but "Gravity Probe B" was not a failure - NASA and science simply learned there is no "frame-dragging" or "space-time fabric" and Einstein's General Theory has another weakspot (his "Principle of Equivalence" is the big one).

The size of the universe is determined by the laws of nature. Where these laws end, at the boundary, the universe ends, space itself ends - nothing can exist beyond the border. All the matter and energy that strike the boundary are absorbed. At the same time new massless matter is created to replace the absorbed matter.

Human Imagination' has allowed mankind to delve into the secrets of the universe - to behold the wonders of the nature. It is our Special Sense - it created the "Mind" of mankind!
This "seventh sense" gives humans the ability to visualize things within our mind that has not yet occurred or may never occur - to imagine. It is not vital to our survival - the Neanderthals survived remarkably well without this "seventh sense".

A huge construction project has been taking place in Niagara Falls, Ontario since 2005. The Mighty Niagara river's energy output, far from being completely tapped out, is again being tapped for a tremendous additional amount of new electrical (hydro) power. The new 6.4 mile tunnel will run under the City of Niagara Falls, Ontario from the upper Niagara River to the Sir Adam Beck Power Stations at Queenston at a maximum depth of 140 meters (459 feet).

For long journeys into deep space, such as to Pioneer 10 and 11 rocket journeys, scientists will have to take into consideration, the new corrected gain in mass, (and therefore gravitational attraction) caused by the force of the rocket engines and Jupiter's gravity, during its acceleration, into their calculations.

Little did Galileo dream that his famous experiment would be tested on the moon some day. The experiment once again "proved" that gravity causes objects of different weights to accelerate at the same rate, as they fall.

Learning that the galaxies were accelerating was completely unexpected since the cosmologists thought they would find them coasting or slowing.

"Metaphysical" means: Going beyond the physical world that we can discern with our senses, into the mysterious supernatural world where only human imagination can venture.

Absolute Space has no direction, or geometry (Euclidean or Riemmanian) it is all one, there is no part of absolute space. When you speak of coordinates or references you are not speaking of space itself you are speaking of points or lines within space - not absolute space itself.

When the Earth was very young, its faster rotation caused it to have a much larger equatorial circumference than it has at the present time. It was spinning fast enough to have a "Saturn type ring" around it.