It would take 353,7 days of constant 1G (9,81 m/s^2) acceleration to reach the speed of light. In that time you would travel 4,58 billion Km. But the human body can take more than 1G, not sure what's the limit, and for how long. Note: That's 353,7 years from wherever you want to observe it.
Based on our current understanding of physics and the limits of the natural world, the answer, sadly, is no. According to Albert Einstein's theory of special relativity, summarized by the famous equation E=mc2, the speed of light (c) is something like a cosmic speed limit that cannot be surpassed.
To summarize, according to the immutable laws of physics (specifically, Einstein's Theory of Special Relativity), there's no way to reach or exceed the speed of light.
If you limited your acceleration to 10G's, or about 100 m/s2, then one gets 3,000,000 seconds, or about 35 days to reach the speed of light (or thereabouts).
Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
SInce light-year is the distance travelled by the light in one year while travelling with the speed of light i.e. 3×108m/s 3 × 10 8 m / s . It would take 500 years to travel 500 light-year distance at the speed of light.
One of the most distant exoplanets is 3,000 light-years (17.6 quadrillion miles) away from us in the Milky Way. If you were to travel at 60 miles an hour, you would not reach this exoplanet for 28 billion years.
Within conventional physics, in accordance with Albert Einstein's theories of relativity, there's no real way to reach or exceed the speed of light, which is something we'd need for any journey measured in light-years.
Normal humans can withstand no more than 9 g's, and even that for only a few seconds. When undergoing an acceleration of 9 g's, your body feels nine times heavier than usual, blood rushes to the feet, and the heart can't pump hard enough to bring this heavier blood to the brain.
And there's an ultimate cosmic speed limit that applies to every object: nothing can ever exceed the speed of light, and nothing with mass can ever reach that vaunted speed.
While 1% of anything doesn't sound like much, with light, that's still really fast – close to 7 million miles per hour! At 1% the speed of light, it would take a little over a second to get from Los Angeles to New York. This is more than 10,000 times faster than a commercial jet.
And that's what NASA engineer David Burns has been doing in his spare time. They've built an engine concept that, they say, can theoretically accelerate to 99 percent of the speed of light—without using up all the propellant.
“Based on the physics that has already been accrued, velocities beyond 10% the speed of light will be very difficult to achieve,” Millis says.
Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
The closest humankind has ever come to reaching the speed of light is inside of powerful particle accelerators like the Large Hadron Collider and the Tevatron.
A witness said it was "absolutely inconceivable anybody could go that fast, then just stop, and survive." But Stapp did—in fact, he went on to live another 45 years, dying quietly at home in 1999 at the age of 89—and he experienced a record-breaking 46.2 G's.
On the other hand, an expert pilot in command of an Extra 300 stunt plane can pull 10 Gs, even though the plane has a top speed of just over 200 miles per hour. This is due to the plane's extreme maneuverability and construction that can withstand G-forces significantly higher than even 10 Gs.
That being said, is it possible for the human body to be able to withstand such acceleration? The most likely answer is a resounding no. Mach 10 speed has been achieved by aircraft in the past.
There are known to be solutions to the equations of general relativity that describe spacetimes which contain closed timelike curves, such as Gödel spacetime, but the physical plausibility of these solutions is uncertain. Many in the scientific community believe that backward time travel is highly unlikely.
Going faster than the speed of light
Astronomers agreed that the black hole was spinning really fast, but obviously not as faster than the speed of light — the universal speed limit. Yet, Chandra's X-ray data showed that M87 was spinning between 2.4 to 6.3 times faster.
Nothing's faster than the speed of light. Except the speed of dark. That might sound like the tagline of a grim and gritty movie that's trying way too hard, but it also happens to be true.
We can see objects up to 46.1 billion light-years away precisely because of the expanding universe. No matter how much time passes, there will forever be limits on the objects we can observe and the objects that we can potentially reach.
Galaxies may exist at that distance, but their light would be too faint for our telescopes to see. C. Because looking 15 billion light-years away means looking to a time before the universe existed.
Some galaxies will have fallen over the cosmic horizon, where no amount of time would ever let you reach them. If you wanted to travel 100 trillion light years away, you could make the journey in 62 years.