Re: The Astronomy Thread
Posted: Tue Dec 22, 2015 4:43 pm
Not a new video, but a well-put together animation by the American museum of Natural History that gives a short but fantastic insight into the immenseness of the known universe, it is based on the world's most complete four-dimensional map of the universe, the Digital Universe Atlas.
As for aliens knowing of our presence, if we assume that the speed of light is a speed limit then the bubble shown at 2:38 is the furthest that the very earliest radio transmissions from Earth have got into space. You will see, nowhere at all, really. Not even to 99.99% of our own galaxy. In this still, I have highlighted this bubble with an arrow. that's it, that's as far as any of our signals have ever got. Watching it is quite a humbling experience if you think about it, but amazing too. https://youtu.be/17jymDn0W6U |
Not a new video, but a well-put together animation by the American museum of Natural History that gives a short but fantastic insight into the immenseness of the known universe, it is based on the world's most complete four-dimensional map of the universe, the Digital Universe Atlas.
As for aliens knowing of our presence, if we assume that the speed of light is a speed limit then the bubble shown at 2:38 is the furthest that the very earliest radio transmissions from Earth have got into space. You will see, nowhere at all, really. Not even to 99.99% of our own galaxy. In this still, I have highlighted this bubble with an arrow. that's it, that's as far as any of our signals have ever got. Watching it is quite a humbling experience if you think about it, but amazing too. https://youtu.be/17jymDn0W6U |
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