A light year is about 6 trillion miles, the distance light travels in a year.
2006-08-30 07:54:44 · 11 answers · asked by Me 6 in Science & Mathematics ➔ Astronomy & Space
Millions of years.
Doug
2006-08-30 07:57:15 · answer #1 · answered by doug_donaghue 7 · 0⤊ 1⤋
Once the first indication of the star "burning out" got here (..millions of years after it actually began) the length of time it would take to fade completely as seen from Earth would be exactly the same length of time the fading actually took.
For example, assume the star is 2-million light years away. It begins to "burn out," an event that's marked by a sudden brightness of the star. Soon after the "burning out" begins, the star starts to fade and after 500-thousand years the star is no more. 2-million years after the sudden brightening actually happened we'd see it here on Earth. Next we'd see the fading begin, and 500-thousand years later we'd see the star no more.
2006-08-30 15:05:25 · answer #2 · answered by Chug-a-Lug 7 · 0⤊ 1⤋
It depends on how far away it is. So if it burned out 1 million years ago but is 2 million light years away, then we will see it for another million years.
2006-08-30 14:58:26 · answer #3 · answered by Tristansdad 3 · 1⤊ 1⤋
It fades as quickly as the star fades. In the past couple of years I have photo graphed super novas in other galaxies. These are stars that are going through and explosive death. From the point the Star is confirmed as a Super Nova to the time it is no longer visable from my telescope is as short as 3 weeks, somtimes a month and a half.
Stars in our own galaxy can be a little differnt. A star such as Antares is going through a differnt death, it is just going to fade away. It will take millions of years for us to watch this star fade, it will take as long for us to watch it to fade as the star itself takes to fade we are just watching it on time delay depending on how far we are from the star.
2006-08-30 15:05:28 · answer #4 · answered by Scott A 2 · 0⤊ 1⤋
Millions of years after it "really" burns out.
2006-08-30 15:34:38 · answer #5 · answered by Anonymous · 0⤊ 1⤋
a light age is one hundred thousand million years, an electron originating from a given grav. constant survives in that state for an experience of that amount of time
2006-08-30 15:18:27 · answer #6 · answered by gekim784l 3 · 0⤊ 1⤋
a million years
2006-08-30 14:57:25 · answer #7 · answered by Mr.happy 4 · 0⤊ 1⤋
It depends on the nature of the burnout. Novas and supernovas lose brightness in a predictable fashion, but the details are not readily at hand.
2006-08-30 15:01:24 · answer #8 · answered by Anonymous · 0⤊ 1⤋
well, first of all it depends how the star dies. like all stars, it can go out in several ways. if it supernovas, it will stop giving off light fairly rapidly, but if it dies slowly, it will fade over many more years, possibly millennia.
2006-08-30 14:59:05 · answer #9 · answered by Rvardell 3 · 0⤊ 1⤋
0 seconds.The star BURNED out and you are asking how long it will take to FADE out.
If you are asking how long it will take for us to notice it has stopped shining, you need to specify how far away the star is.
2006-08-30 15:20:44 · answer #10 · answered by Patrick Bateman 3 · 0⤊ 1⤋