4 Time Travel Theories and the Physics Behind Them
2020年2月22日 · Time travel has been the subject of many science-fiction books and films for the last few decades. But is it possible? Are there any time travel theories that could actually work? We are all time travellers. That is to say, we all travel through time.
Time travel - Wikipedia
Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, traversable wormholes, and Alcubierre drives.
Is Time Travel Possible? | NASA Space Place – NASA Science for …
2024年12月5日 · How do we know that time travel is possible? More than 100 years ago, a famous scientist named Albert Einstein came up with an idea about how time works. He called it relativity. This theory says that time and space are linked together.
Is time travel really possible? Here’s what physics says - BBC
Let's start with Albert Einstein's theories of relativity, which set out a description of space, time, mass and gravity. A key outcome of relativity is that the flow of time isn't constant....
Time travel: Is it possible? - Space.com
2024年2月24日 · Explore physicist Peter Millington's thoughts about Stephen Hawking's time travel theories at The Conversation. Check out a kid-friendly explanation of real-world time travel from NASA's...
A beginner's guide to time travel - Live Science
2022年7月13日 · Learn exactly how Einstein's theory of relativity works, and discover how there's nothing in science that says time travel is impossible.
Can we time travel? A theoretical physicist provides some answers
2022年6月13日 · 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...
Quantum mechanics of time travel - Wikipedia
Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time.
Is time travel possible? An astrophysicist explains - Astronomy …
2023年12月15日 · However, physicist Albert Einstein’s theory of special relativity suggests that time passes at different rates for different people. Someone speeding along on a spaceship moving close...
Time Travel - Internet Encyclopedia of Philosophy
In science, different models of the cosmos and the laws of nature governing the universe imply different possibilities for time travel. So, theories about time travel have changed radically as the dominant cosmological theories have evolved from classical, Newtonian conceptions to modern, relativistic and quantum mechanical conceptions.