how many light years did it take for the supernova in 1054 a.d. to be seen?

Answer 1

Light years are a measure of distance. Not of time.

The Crab Nebula (Messier Catalogue M1) is the remnant of the supernova that was recorded by Chinese and Arab astronomers in 1054.

The nebula was first observed in 1731 by John Bevis. Located at a distance of about 6,300 light years (2 kpc) from Earth, the nebula has a diameter of 11 ly (3.4 pc) and is expanding at a rate of about 1,500 kilometres per second.

Thus we can deduce the supernova explosion took place in about 5,246 BC. It took 6,300 years for the light from that explosion to reach earth. It took a further 677 years for the remnants to become observable from earth (they are only 8th magnitude and had to await telescopes being developed that could see them),

In contrast the original supernova was much brighter. It was recorded by Chinese and Arab astronomers as being bright enough to see in daylight for 23 days and was visible in the night sky for 653 days.

Answer 2

A "light year" is not a unit of time. It is a unit of distance! A "light year" is the distance light travels in one year. The idea is that one would see an astronomical event a certain number of years after it actually occured, the number of those years corresponds to the number of "light years" away we are from the event. The concept of timing the thunder and calculating distance after seeing the lightning is very similar.

In more direct answer to your question, the supernova of 1054 is believed to be the event that led to the formation of what is now referred to as the "Crab Nebula". The Crab Nebula is an object that has been visible to astronomers since the 1700's, and is about 6500 light years distant. This means that it took light about 6500 years to reach us, after the event.

The story of how people have come to the conclusion that the Crab Nebula is in fact the same object as the 1054 supernova is actually quite interesting but is beyond the scope of this answer. I encourage you to research this further, if it is of intererst to you!

I hope that helps.

Answer 3

The Crab Nebula is a supernova remnant in the constellation of Taurus. The nebula was first observed in 1731 by John Bevis. It is the remnant of a supernova that was recorded by Chinese and Arab astronomers in 1054. Located at a distance of about 6,300 light years from Earth, and is expanding at a rate of about 1,500 kilometres per second. So, the answer to your question is that from the moment of the explosion, it took 6,300 years for the super nova to become visible from Earth.

The nebula contains a pulsar in its centre which rotates thirty times per second, emitting pulses of radiation from gamma rays to radio waves. The nebula was the first astronomical object identified with a historical supernova explosion and was also recorded by the Hopi Indians at Chaco Canyon.

Answer 4

you're maximum surprising There are 2 factors. sure it somewhat befell in 1054AD for individuals to work out it then. And certainly we are able to nonetheless see in 2013 because it exits 959 years after the form. although this is approximately 6500 easy years from right here. So we see it 6500 years interior the previous . It exploded 6500 years earlier than 1054 advert meaning approximately 5446 BC

Answer 5

I dont know what you would call a light year if it isnt a measure of time! A light year is STILL a year! It IS a measure of distance but it would be pretty stupid to ask how many minutes it took for the light to get here! Henceforth, it IS a measure of time! You junior astronomers need to go back and take astronomy over again! It is about 6000 light years away.

Answer 6

5600 light years away. So the light took that long to get here.