NASA's space telescopes also give us a way to recall in time. Telescopes help us see celebrities and galaxies that are very far. It takes a very long time for the light from distant galaxies to get to us. So, when we appearance right into the skies with a telescope, we are seeing what those celebrities and galaxies looked such as a long time back.
However, when we think about the expression "time travel," we are usually thinking of taking a trip much faster compared to 1 second each second. That type of time travel seems like something you had just see in movies or sci-fi publications. Could it be real? Scientific research says yes!
How do we understand that time travel is feasible?
Greater than 100 years back, a well-known researcher called Albert Einstein turned up with an idea about how time works. He called it relativity. This concept says that time and space are connected with each other. Einstein also said our world has a rate limit: absolutely nothing can travel much faster compared to the speed of light (186,000 miles each second).
For instance, there was an experiment that used 2 clocks readied to the exact same time. One clock remained on Planet, while the various other flew in an plane (going parallel Planet rotates).
After the plane flew worldwide, researchers contrasted both clocks. The clock on the fast-moving plane was slightly behind the clock on the ground. So, the clock on the plane was taking a trip slightly slower in time compared to 1 second each second.
Can we use time travel in daily life?
We can't use a time machine to travel centuries right into the previous or future. That type of time travel just happens in publications and movies. But the mathematics of time travel does affect the points we use daily.
For instance, we use GPS satellites to assist us determine how to reach new places. (Inspect out our video clip about how GPS satellites work.) NASA researchers also use a high-accuracy variation of GPS to monitor where satellites remain in space. But did you know that GPS depends on time-travel computations to assist you navigate community?
GPS satellites orbit about Planet very quickly at about 8,700 miles (14,000 kilometers) each hr. This decreases GPS satellite clocks by a small portion of a 2nd (just like the plane instance over).
