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1. • 

     semanticscholar.org

     • The fabric of space-time is a conceptual model combining the three dimensions of space with the fourth dimension of time. According to the best of current physical theories, space-time explains the unusual relativistic effects that arise from traveling near the speed of light as well as the motion of massive objects in the universe.
     www.livescience.com/space-time.html

     What is space-time? - Live Science

2. People also ask

   Is time a physical thing?

   • In relativity, time is a physical, dynamic thing, fused with space to form space-time – the fabric of the universe itself. And space-time isn’t absolute, but relative, warped by motion and gravity. If you travel fast, or if you are in a strong gravitational field, it slows down. The relativity of time has wide-ranging consequences.

   What is time? The mysterious essence of the fourth dimension

   www.newscientist.com/article/mg25433910-500-what-is-time-the-mysterious-essence-of-the-fourth-dimension/

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   Is time travel forbidden by Relativity?

   • (Rodrigo Gonzales/Unsplash) Since Albert Einstein’s theory of relativity — which describes the nature of time, space and gravity — is our most profound theory of time, we would like to think that time travel is forbidden by relativity.

   Can we time travel? A theoretical physicist provides some answers

   theconversation.com/can-we-time-travel-a-theoretical-physicist-provides-some-answers-182634

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   Are space and time independent quantities?

   • There is no conceivable way of doing this within the framework of Newtonian physics, in which space and time are completely separate quantities and time flows always in one direction. But according to Albert Einstein, space and time are not independent quantities. Rather, they constitute a four-dimensional fabric of spacetime .

   What Is the Nature of Space and Time? (The Physics of Space ... - Springer

   link.springer.com/chapter/10.1007/978-3-030-29393-2_2

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   Is time travel possible?

   • There are also technical challenges: it might be possible but would involve vast amounts of energy. There is also the matter of time-travel paradoxes; we can — hypothetically — resolve these if free will is an illusion, if many worlds exist or if the past can only be witnessed but not experienced.

   Can we time travel? A theoretical physicist provides some answers

   theconversation.com/can-we-time-travel-a-theoretical-physicist-provides-some-answers-182634

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   What do scientists want to know about time?

   • Of course, scientists want to understand how we experience time in mathematical terms that can be tested through experiments. In relativity, the three dimensions of physical space are combined with the one dimension of time into a four-dimensional space-time. The basic elements of space-time are events and worldlines.

   What is time? An astronomer explains - Astronomy Magazine

   www.astronomy.com/science/what-is-time-an-astronomer-explains-the-search-to-find-its-origins/

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   What are the basic elements of space-time?

   • The basic elements of space-time are events and worldlines. Events are points within four-dimensional space-time at which some physical interaction or phenomenon takes place, such as two particles colliding or a particle emitting a photon. Worldlines are the paths objects trace through space-time along a sequence of events.

   What is time? An astronomer explains - Astronomy Magazine

   www.astronomy.com/science/what-is-time-an-astronomer-explains-the-search-to-find-its-origins/

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3. www.quantamagazine.org › what-is-the-nature-ofWhat Is the Nature of Time? - Quanta Magazine

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   Feb 29, 2024 · Time is all around us: in the language we use, in the memories we revisit and in our predictions of the future. But what exactly is it? The physicist and Nobel laureate Frank Wilczek joins Steve Strogatz to discuss the fundamental hallmarks of time.

4. www.nature.com › articles › d41586/018/05095-zWhat Is Spacetime? - Nature

   www.nature.com › articles › d41586/018/05095-z

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   May 9, 2018 · In physics and, more generally, in the natural sciences, space and time are the foundation of all theories. Yet we never see spacetime directly. Rather we infer its existence from our everyday ...

   • Author: George Musser

   • Publish Year: 2018

5. Videos

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     Amazing Journey From Earth to the End of the Universe

     30 Apr 2018

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6. theconversation.com › can-we-time-travel-aCan we time travel? A theoretical physicist provides some answers

   theconversation.com › can-we-time-travel-a

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   • Laws of Physics
   • Resolving Paradoxes
   • Time Is A River

   Since Albert Einstein’s theory of relativity — which describes the nature of time, space and gravity — is our most profound theory of time, we would like to think that time travel is forbidden by relativity. Unfortunately, one of his colleagues from the Institute for Advanced Study, Kurt Gödel, invented a universein which time travel was not just p...

   See full list on theconversation.com

   There is no doubt that if we could time travel freely, we run into the paradoxes. The best known is the “grandfather paradox”: one could hypothetically use a time machine to travel to the past and murder their grandfather before their father’s conception, thereby eliminating the possibility of their own birth. Logically, you cannot both exist and n...

   See full list on theconversation.com

   Roman emperor Marcus Aurelius wrote that: We can imagine that time does flow past every point in the universe, like a river around a rock. But it is difficult to make the idea precise. A flow is a rate of change — the flow of a river is the amount of water that passes a specific length in a given time. Hence if time is a flow, it is at the rate of ...

   See full list on theconversation.com

7. www.newscientist.com › article › mg25433910-500-whatWhat is time? The mysterious essence of the fourth dimension

   www.newscientist.com › article › mg25433910-500-what

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   Jun 15, 2022 · In relativity, time is a physical, dynamic thing, fused with space to form space-time – the fabric of the universe itself. And space-time isn’t absolute, but relative, warped by motion and...

8. www.bbc.com › future › articleIs time travel really possible? Here’s what physics says - BBC

   www.bbc.com › future › article

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   The ability to jump forward and backwards in time has long fascinated science fiction writers and physicists alike. So is it really possible to travel into the past and the future?

9. www.astronomy.com › science › what-is-time-anWhat is time? An astronomer explains - Astronomy Magazine

   www.astronomy.com › science › what-is-time-an

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   Jan 24, 2024 · In relativity, the three dimensions of physical space are combined with the one dimension of time into a four-dimensional space-time. The basic elements of space-time are events and...

10. link.springer.com › chapter › 10What Is the Nature of Space and Time? (The Physics of Space ...

    link.springer.com › chapter › 10

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    Nov 2, 2019 · But from a scientific perspective, what is the nature of space and time? Is time travel possible? The answers to these questions have changed considerably over the last few centuries. People assume that time is a strict progression of cause to effect.