Reply With QuoteDimensions in the universe are so vast that it is hard for the mind to comprehend.. that animation has helped, thanks crazy.
The biggest star (animation)
Largest know star in an animation comparing it to earth
| Look Here -> |
Dimensions in the universe are so vast that it is hard for the mind to comprehend.. that animation has helped, thanks crazy.
Thats amazing just to see the difference
When you do things right, people won't be sure that you have done anything at all
Some of those largest stars must be approaching the size of our solar system.
She's gunna blow, and when it does... it's going to make one hell of a mess !
If one of those bigguns in our stella neighbourhood went supernova, would they also give Earth a lethal dose of radiation? Sirius for example, if it blew, would we be stuffed?
sweet you just don't relise how big they are untill you see them like that, and we are just a speck,
Tagg
Sirius is close enough to be a concern, but it's not likey to go anywhere in the immediate future (20,000 years) and there's nothing we could do about it anyway.
There are a couple of saviours. First is distance square law gives us some protection. Our atmosphere would also give us some protection, the biggest problem would be the continuous daylight for a couple of weeks. It would really throw things out of whack for a while and no doubt cause some serious problems. But I'm not sure that it would be an extinction level event.
Though this kind of thing may what be what caused the extinction of the trilobites etc.
Makes me wonder how big our alien neighbors would be
Especially if they wanted to come down
here and kick some Earth's butt
When you do things right, people won't be sure that you have done anything at all
You've been watching too much TV1 again haven't you B4L ?
Just can't get enough of the "Land of the Giants" !
Large stars have short lives, so it is less likely they will have time to develop life or intelligent life. Large stars don't mean large planets, nor large life.
In fact a large planet with large mass and gravity, is likely to have smaller life as the same laws of physics apply there as they do here.
Large dense stars do tend to go supernova and are themselves, the seeds of life.
VY Canis Majoris is probably an old star that was once a Yellow Dwarf like our own sun. It's now at the end of its life. Eventually it will shed the outter layers in a nebula and only a white dwarf will be left.
If there are any planets left around this star, they will probably be Neptune like planets that have been evenly roasted over the past couple of million years.
geez, that's a spinout!
So Canis Majoris is huge
Question- when it blows from what point might it blow ie a uniform explosion all around it at a particular shell level or a point explosion on one side?
Clouds of debris we see tend to be roughly circular. A chunk of white hot material coming at us would seem brilliant white?
Like a cannon ball, is this the white dwarf we see? ......and I've just come out of the bunker after the satelite shoot down.
The "explosions" can be seen as planetary nebula. Many are more or less circular, multi coloured and very pretty. Unless your standing too close.
Scaling the Universe.
*Earth Diameter=~12800km, Moon Diameter=~3500km distance=~385000km
If the earth is 10cm diameter, the moon 2.73cm and they are 3 metres apart.
Sun diameter=~1400000km distance=~150000000km, Distance to Alpha Centauri 4.4 light years (41627.52 Billion km)
If the sun was the size of a 1cm marble, The Earth would be about 1m away, Alpha centauri would be ~300km away.
If the distance betwen the Sun and the Alpha Centauri was 30 metres, the galaxy would be ~700km across and
~7km thick on the spiral arms.
Scale this down to 3cm from Sol to Centauri, The Milky Way galaxy is still 700 metres across and 7 metres thick.
84 metres thick at the galactic buldge. (contains ~250,000,000,000 stars)
Andromeda the nearest Spiral Galaxy is 2 Million light years away, at this scale it is ~14km away.
If we scale the whole milky way galaxy down to 1 metre diameter, then Andromeda is still 20 metres away.
At this scale, the whole universe is still about ~2000km diameter
If we scale the Milky Way down to 1cm, Andromeda is 20cm away and the universe is still 20km diameter.
Our Galaxial cluster "The Local Group" is ~1 metre diameter and contains about 35 galaxies.
for some reason canis majoris made me lol... probably because it sounds like a fancy name for a beatdown
Banned
It all kind of makes us as pretty small and insignificant on the grand scale of things, huh?Originally Posted by trash
Great animation though!
Hey good to see you about again ED !
Some of us are small and insignificant without that thought in mind
Good to see you too, trash...
and only you could come up with a great monty python song!!
After reading this, i looked up a little bit more on lenghts:
)
Interesting stuff.
Lets just say the universe is BIG. How big ?
The example I gave above of ~20km is if you look at spacetime in the universe as being flat.
Spacetime is curved in the real universe the edge is somewhere out at 125km and the furtherest galaxies about 70km out.
How space just rolls of like this into infinity really starts to hurt the brain.
I suspect that Theoretical Astrophysicists pick mushrooms in their spare time.
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