6,300 years
The Crab Nebula is about 6,500 light-years away from Earth. Since one light-year is the distance light travels in one year, it took 6,500 years for the light from the Crab Nebula's explosion in 1054 to reach Earth.
Do you mean a nova? A Nebula is a large group of stars and dust in the sky. e.g. the Orion nebula. An individual star would not ordinarily change into a nebula, but the Crab Nebula is one such, first seen on earth about 1054 CE. But it had taken about 6500 years for the light to reach us. If your query was about nova or supernova, ask again.
1344 years
In our Solar System, we see light from our sun reflected off the planets. In more distant galaxies, light from many millions of stars takes a long time to reach the Earth. It takes light 4 years to reach the Earth from Sirius, a near neighbouring star. Using the Hubble telescope, we can see the light from the Eagle Nebula, which takes 7,000 years to reach the Earth.
well the crab nebula is about 6,500 light years away so it would take 6,500 years to get there at the speed of light but we do not have any space craft that travel at that speed so it would take over a billion if not trillion years to get there!
Gamma rays and light waves can reach Earth at the same time if they are emitted simultaneously from the same event, such as a supernova explosion. Since both travel at the speed of light in a vacuum, they can arrive on Earth together, despite having different properties and wavelengths.
The light of the explosion wouldn't arrive at the Earth for 500 years.
The Eagle Nebula is around 7,000 light-years away from Earth in the constellation Serpens. This distance is so vast that it would take thousands of years for our fastest spacecraft to reach there.
There are currently no stars in the Orion constellation showing signs of going supernova. If a star in the Orion constellation were to go supernova, it would likely be visible to us on Earth given Orion's proximity.
If you mean light from the Sun, then it takes eight minutes for the light to reach the Earth.
it does reach the earth in light energy.
Of course not. Even if our Sun was going to go supernova, which it won't. There would still be a delay of 8.333 minutes for the light to reach us. Obviously - if you were right next to it, you could eliminate the delay, but you would be unable to observe it, as you would become part of the supernova instantly.