Let us distinguish what we can think of as possible from what is physical reality.
The physical reality is as follows: A satellite launched into orbit that follows the shape of a hyperbola will free fall; that is, no force is necessary to move it, This satellite will not impact on the earth because its trajectory matches the curvature of the earth. If you were riding on that satellite you would think you were getting further away from earth. The fact is that satellite is only circling the earth forever. The same thing would happen if a satellite were launched into orbit out of the universe instead of the earth. This satellite will free fall but circling the universe. That is why the statement "the universe is finite but boundless."
The possibility of an end of the universe is only in the mind. It is like building a bridge intended to be straight that would link the earth with Venus. The possibility of such a bridge is only in the mind. The physical reality is that that bridge would end at your feet. This is explained by the generalized theory of relativity. The straightest line is curved called geodesic.
Fascinating question, Eugbug. There is a lot of evidence that space had a beginning, and is expanding right now. I believe it was Penrose and Hawking who both proved mathematically that space had a beginning--in addition to the evidence-- therefore, with the expansion being finite we know that there is an end to space. So what is beyond that end? I personally believe it is a higher dimension of space, as for example, the 4th spacial dimension. The 4th dimension could be permeating our space, and the expansion of our 3D space is simply the expansion of a speck in 4D space. The way my dog eats, I have a big bang expansion going on right here in the house!
In fact, Einstein had included a fourth dimension to the three Euclidean dimensions. The fourth dimension is time that resulted in the concept space-time in the theory of gravity, subsumed in the generalized theory of relativity.Time is Riemannian.
by Robert pires 7 years ago
is it a reality or just an hypothetical concept????
by Emile R 5 years ago
I've put this into the philosophy forum because I'm interested in what those who ponder the meaning of the cosmos would consider the ramifications of the answer to be.We talk of the Space-Time Continuum. We know the following:Cosmologists tell us it would be impossible to go back in time because...
by Stacie L 7 years ago
Dead Satellite Will Fall to Earth By September's End, NASA SaysBy Clara Moskowitz, SPACE.com Senior WriterSpace.com | SPACE.com – A defunct satellite poised to fall back to Earth will make its death plunge during the last week of September, NASA officials now say.The spacecraft, an old NASA...
by Aqeel Saeed 9 years ago
if it happens then just move in universe, today in ploto and the other day in other galaxy.
by DaniellaWood 7 years ago
Is there life on other planets? What do you think?Scientific descoveries suggest that some planets are too hot or too cold for life and that others have no water and so on. But surely humans and animals canNOT be the only living creatures in the whole of the solar system...some even claim to...
by TruthDebater 8 years ago
Do you create the universe, the universe creates you, or both?It could be said that you create everything you see and sense by your mental interpretation. If it takes the mind to determine all physical reality, would it take a mind to build all physical reality? If it wouldn't take a mind to build...
Copyright © 2019 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
|HubPages Device ID||This is used to identify particular browsers or devices when the access the service, and is used for security reasons.|
|Login||This is necessary to sign in to the HubPages Service.|
|HubPages Traffic Pixel||This is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.|
|Remarketing Pixels||We may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.|
|Conversion Tracking Pixels||We may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.|