In one year (365.25 days) that is equivalent to 5,869,713,600,000 miles. For instance, if you see a photo of a galaxy that is 90 million light years away, you’re actually getting a glimpse of what that galaxy looked like 90 million years ago. A light year is a measurement of distance. This distance is measured by how far light can travel in a year. Example: How far does light travel in 3 months. If you were traveling at the speed of light (186,000 miles per second) then it would take you 20 years to travel 20 light years. And you will feel that within 20 years you will be … Then you can use this calculator to work out how long it will take you, how much energy your spacecraft needs and what your maximum velocity will be. That is only 400 million years after the big bang . TRAPPIST-1 is 39 light-years away from Earth, or about 229 trillion miles (369 trillion kilometers). At that speed, it would take approximately 165,000 years to arrive at Alpha Centauri and approximately 1,491,280 years to reach the TRAPPIST-1 system.

Instead of having to comprehend what it means when a planet is trillions and trillions of miles away, thinking in light years can help you visualize how long it takes for light to travel from one spot to the other.

anything that travels close to the speed of light has a different time zone than people like us, standing still. If you travel close to the speed of light, you can also see how much time it will take from your point of view and from the point of view of the people on earth. for someone travelling .999 times the speed of light, they may feel like they approached a light year in much less than a year. no real object can travel the speed of light. It would take 39 years to get to its current location traveling at the speed of light . a light year is the distance that light travels in 1 year. Light travels at approximately 186,000 miles per second. the answer to this is complicated. But as the time slows down for the objects travelling near the speed of light, your time will be slowed down by half.

If you travelled at the speed of light in an Spacecraft, it will take the 40 years for you to reach there practically. It is one of the first galaxies ever formed in the universe. 3 months is 1/4 year. It is 13.4 billion light-years away, so today we can see it as it was 13.4 billion years ago.