The impact of low Earth orbit on the lifespan of astronauts may be negligible. It is more suitable for sibling pranks than real life extensions or visits to the distant future, but the time dilation between people on Earth and GPS satellites traveling through space does produce influences.
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Global Positioning System, or GPS, communicates with a network of dozens of satellites placed in high-earth orbits to help us know exactly where we are. The satellite orbits the earth from 12,500 miles (20,100 kilometers) away, moving at a speed of 8,700 mph (14,000 km/h).
According to the special theory of relativity, the faster an object moves relative to another object, the slower the time experienced by the first object. According to the publication of the Center for Physics of the American Physical Society, for GPS satellites with atomic clocks, this effect will be truncated by 7 microseconds, or 7 millionths of a second, every day.
Read more: Is the faster-than-light speed engine in Star Trek really useful?
Therefore, according to the general theory of relativity, clocks close to the center of large gravitational mass such as the earth travel more slowly than clocks far away from the earth. Therefore, because GPS satellites are farther from the center of the earth than clocks on the surface, Physics Central adds that this increases the clocks of GPS satellites by another 45 microseconds per day. Combined with the negative 7 microseconds calculated by the special theory of relativity, the final result is an additional 38 microseconds.
This means that to maintain the accuracy required to locate your car or phone, or, because the system is operated by the US Department of Defense, military drones, engineers must consider an additional 38 per satellite day. Microseconds. The onboard atomic clock doesn’t start counting until it runs 38 microseconds longer than similar clocks on Earth.
Taking these numbers into account, it takes more than seven years for the atomic clocks of the GPS satellites to be out of sync with the Earth’s clock. (We did a calculation: If you estimate the blink to last at least 100,000 microseconds, as Harvard’s useful biometric database did, it would take thousands of days to add up the 38 microseconds changes.)
This time travel seems like The age difference is as insignificant as the Kelly brothers, but considering the ultra-precision of modern GPS technology, it really matters. If you can communicate with the satellites that buzz above your head, your phone can determine your location in space and time with incredible precision.
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Can the wormhole take us back in time? According to NASA,
General Relativity can also provide scenarios that allow travelers to go back in time. But the physical reality of these time travel methods is no piece of cake.
Wormholes are theoretical “tunnels” that cut through the fabric of time and space and can connect different times or locations in reality with other times or locations. Also known as the Einstein Rosen Bridge or White Hole, in contrast to black holes, speculations about wormholes abound. However, despite taking up a lot of space (or time and space) in science fiction, no wormholes of any kind have been found in real life.
Stephen Hsu, professor of theoretical physics at the University of Oregon, told Space.com’s sister site Live Science, “At this point, everything is very hypothetical.” “Nobody thinks we will find a wormhole anytime soon.”
We can use worms, does the hole go to other universes? Chapter
Can We Use A Wormhole To Travel Through Time And Space? First, we must find one. (Image source: ktsdesign/Shutterstock)
In addition to the lack of identifiable wormholes, another obstacle to wormhole time travel is their assumed size. It is expected that the original wormhole will be infinitely small, approximately 10^34 inches (10^33 cm) at the “mouth” of the tunnel. As the universe expands, wormholes may spread, but other problems also follow.
Even hypothetical wormholes are considered extremely unstable, Xu said, blinking and disappearing before anything can pass through them.
“A very strange material is needed to stabilize the wormhole,” added Xu, “It is not clear whether this material exists in the universe.”