Listener 4847 Demeaning By Lionheart
Crosswords0 min ago
Would it be possible to see real dinosaurs if.....?
At the start of this month there was a supernova that was slightly visible from earth with a telescope. However as it was 21 million light years away it meant that what we were seeing now actually happened millions of years ago and the light from said spectacle is only reaching earth now, is my understanding.
My query is, on the basis of what I've stated above as being accurate, does that mean that the light from earth at the time of the dinosaurs could be viewed at certain points in the universe, if a powerful enough telescope was available. I'm aware that the technology is not there at the minute but is the theory correct or am I missing something? Probably.
My query is, on the basis of what I've stated above as being accurate, does that mean that the light from earth at the time of the dinosaurs could be viewed at certain points in the universe, if a powerful enough telescope was available. I'm aware that the technology is not there at the minute but is the theory correct or am I missing something? Probably.
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surely also, the travel maybe a bit troublesome, as surely if something is 21 million light years away would mean it would take 21 years to get there by travelling 1 million times the speed of light.
I think we'd likely be more capable of creating actual dinosaurs a la Jurassic Park before we could travel at 1 million times the speed of light.
I think we'd likely be more capable of creating actual dinosaurs a la Jurassic Park before we could travel at 1 million times the speed of light.
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The resolution of a telescope is related to the diametre of the lens/mirror (for a given light wavelength). To resolve a dinosaur (let alone any detail)at 21 million light years would probably require a telescope bigger than the solar system.If you want to calculate how big it would have to be there are plenty of sites giving the formulae to do so via google.
Due to the time it takes light to travel from the Sun to the Earth, the Sun we see has moved on from its apparent position and is not where it appears to be. We see the Sun where it was more than eight minutes ago.
If we aimed and fired a laser pulse from Earth at a target in its apparent position on the Moon it would miss the bulls eyes by ~1.3km.
Seeing the Space Station from the Earth's surface, it has moved on 10 metres from where it appears to be.
Everything we see happened in the past.
If we aimed and fired a laser pulse from Earth at a target in its apparent position on the Moon it would miss the bulls eyes by ~1.3km.
Seeing the Space Station from the Earth's surface, it has moved on 10 metres from where it appears to be.
Everything we see happened in the past.
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