And? Doesn't matter. The effects of a supernova would only arrive as soon as we see it. From our perspective, it is day to day activity.
Betelgeuse could beon the verge of going nova
- Thread starter Marc
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And? Doesn't matter. The effects of a supernova would only arrive as soon as we see it. From our perspective, it is day to day activity.
maybe but in the time it took the first light to reach us the second time frame of light was already far older, so no its not day to day. But the Supernova may have already happened, my main point is that scientist can't for fact say that it is going to happen, becuase we are to primitive space tech wise to accurately date objects.
^At the speed of light it would take just over 4 years for a ship to reach alpha centauri. No generation ship needed.
If you had read through the thread you would have seen that Betelguese is roughly 640 lightyears away. So the supernova could have happened yesterday but we won't know about it for another 640 years.
Time frames of light??? what the heck are you talking about? We see things as they happened 640 years ago because the light has to cross 640 lightyears to reach us.
If you had read through the thread you would have seen that Betelguese is roughly 640 lightyears away. So the supernova could have happened yesterday but we won't know about it for another 640 years.
Time frames of light??? what the heck are you talking about? We see things as they happened 640 years ago because the light has to cross 640 lightyears to reach us.
Wow really just 4 years. Then what the heck Am I thinking about then, some system.
Right. What I meant was that we don't see 641 years and the next day when we look it just 641 years and a day. The amount of time it takes for the first bunch of light to reach us 641, after that 641 years the second bunch of light is older, so we can't see day to day. that clear it up.
Right. What I meant was that we don't see 641 years and the next day when we look it just 641 years and a day. The amount of time it takes for the first bunch of light to reach us 641, after that 641 years the second bunch of light is older, so we can't see day to day. that clear it up.
No, that's wrong.
Yes you DO see day to day second to second but 641 years in the past so what you see now is now -641 years.
Same with the sun, you see it how it was 8 minutes ago but in real time, so day to day, second to second, nano second to nano second - the 8 minute travel time, so when the sun blows up you'll get it 8 minutes later..
Same with the sun, you see it how it was 8 minutes ago but in real time, so day to day, second to second, nano second to nano second - the 8 minute travel time, so when the sun blows up you'll get it 8 minutes later..
Sun's a bit closer than 641 light years.
One of my science teachers once stated that when we look at something far away in space(which is everything). Its like looking at a still picture, it doesn't change. However, once the first amount of light reaches you and passes, you get another still picture of what it looks like another 641 years ago. So I was told that its not really day to day, its a still picture that won't change for another 641 years.
One of my science teachers once stated that when we look at something far away in space(which is everything). Its like looking at a still picture, it doesn't change. However, once the first amount of light reaches you and passes, you get another still picture of what it looks like another 641 years ago. So I was told that its not really day to day, its a still picture that won't change for another 641 years.
Let's say you are watching a clock that is 1000 light years* away with a telescope. You look through it, and it's exactly 12 o'clock. What do you think you will see one second later, one minute later, one hour later?
*doesn't matter, it could be one lightyear, a million lightyears, it could be 8 lightminutes.
*doesn't matter, it could be one lightyear, a million lightyears, it could be 8 lightminutes.
Indeed.
If you look at it now, you'll see how it looked 640 years ago.
If you look at it a minute from now, you'll see how it looked 640 years and 1 minutes ago.
The distance doesn't matter. It's not like universe only updates itself once a year. So if Betelgeuse went nova 640 years ago, we'll be seeing it happen in real time sometime this year. If it goes nova tomorrow, we'll see it happen in real time in the year 2651 (640 years from now).
Well....almost. The distance between us and any given other star is not constant, after all.
I was speaking generally. Next time I will make sure to adjust for orbit and stellar drift.
