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Yes, at this point in time we can be sure that in science there is a history of discoveries that challenged previously accepted fundamental principles.
So much so that nothing that we are now accustomed to accept as immutable, permanent, granted or inscrutable may remain as such in the future.
There are however these 3 principles I believe will never change, and which if questioned will demolish forever our understanding and logical reasoning,
1) the Principle of Causality, that states that effects can only happen after the causes that originate them
2) the Principle of Repeatability, that the same phenomenon repeated under the same conditions must yield the same results
3) the Principle of the Maximum Universal Speed, that the speed of light cannot be exceeded under any circumstances.
Let nobody ever dare challenge these, because he will be considered an Apostate of Science and the Worst of Evils will befall upon him and he will fall into disgrace forever. QED An experiment to prove string theory would be a challenge to the senses, because in the magnitude of 10 exp -30, what is the meaning of measuring or seeing or weighing or…?
The only physical entities that could interact with strings are other strings. The experiments should seek to combine o separate strings in order to change the properties of those elementary particles which they belong to. And next would come the task of measuring these elementary particles, which is still quite another feat! The edge of the Universe is a sphere where matter is receding from our view at the speed of light.
Using the Hubble constant of acceleration of 73.6 Km/sec per megaparsec (mp), and
assuming this constant applies to all regions of space and has not changed since the Big Bang,
the distance at which the recession velocity equals the speed of light should be,
300,000 Km/sec divided by 73.6 Km/sec per mp = 4,076 mp which converted to light years gives
4,076 mp x 3.26 ly/p = 13,288 millions of light years
which I believe matches the distance of the farthest galaxies that can be observed
This is the radius of such sphere, thus the diameter of our observable universe should be 26,576 million light years
I am not sure of the result and would appreciate your comments and corrections Any religion or adherence to supernatural beliefs, as can often be found in these comments, is opposed to the scientific method and is a bias of the mind of the researchers who seek true explanations.
If you were loaded with such beliefs, you received them as a child, when you did not have the chance of an independent opinion or of questioning them. Think about the fate of Galileo, who knew the truth but was obliged to repeal it.
Learn how to jump out of such loads without despising them, refresh and reset your mind, luckily this is possible during our times.
I anticipate that the day dark matter and dark energy become explained, there will be many of those who find sort of the same explanation in some sacred old scriptures. I challenge these people to come out right now, when we know very little, and enlighten our researchers with their well kept clues. LIGO is the latest and one of the major scientific undertakings in human history.
It has pushed the limits of measurement to the range where quantum effects take place.
It has benefited from the creativity of great minds across the world in order design state of the the art detection devices
It has effectively demonstrated the existence of phenomena that Einstein himself predicted and considered unmeasurable.
LIGO is the gateway to a totally new way of observing the universe.
We are so lucky to be alive at this point in history as to learn from the discovery of these waves!
It will bring our knowledge of Astronomy and Cosmology to limits we can hardly imagine today