31–40 of 55 posts
between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?
How long until the most remote and poorest populations in the world can access jobs and the worlds collective knowledge on the internet? That’s a much better question to ask, mr negative.
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Ideally with space based telescopes. Hopefully launching things up into orbit becomes dirty cheap and it's not so unreasonable.
These satellites are going to damage real science that is already costing us billions (and what's more perverse, do it for a profit). Professional astronomers already warned us about the issue, and IMHO there's no reason to think we know better. Of course we're launching telescopes into space (like the James Webb, planned for 2021 [1]), but those won't be able to replace science done by the larger terrestrial telesco…
OneWeb will be worse than fiberoptics while Starlink will be better than fiberoptics. This suggests OneWeb is pretty much doomed to fail.
There’s no way Starlink will be better than fiber. You have to pay a 25 ms penalty just to play, and then you have the cost of each hop, of which there are many.
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There’s no way Starlink will be better than fiber. You have to pay a 25 ms penalty just to play, and then you have the cost of each hop, of which there are many.
Musk is selling precisely that to NYSE-London traders. Speed of light in a vacuum is considerably (I think 40%) faster than speed of light in glass fiber optics
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There’s no way Starlink will be better than fiber. You have to pay a 25 ms penalty just to play, and then you have the cost of each hop, of which there are many.
Musk is selling precisely that to NYSE-London traders. Speed of light in a vacuum is considerably (I think 40%) faster than speed of light in glass fiber optics
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There’s no way Starlink will be better than fiber. You have to pay a 25 ms penalty just to play, and then you have the cost of each hop, of which there are many.
highly recommend you watch these two latency modelings: https://www.youtube.com/watch?v=QEIUdMiColU https://www.youtube.com/watch?v=m05abdGSOxY
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Let's put this to rest for once and all. The average radius of Earth is 6,371 km. Initial sats will be at 550 km height (many will be higher, many somewhat lower, but does not make much diff.) So the surface of the 6,931km radius globe is ~603,672,875 km2 (~604 million square kilometers). Don't have exact size for a Starlink sat, but a good upper bound is 3 x 2 m, i.e. 6 m2 = 0.000006 km2. Let's say there will be 40,…
Looks like you've never done astronomy. A single satellite passing through the shot can saturate the sensor and ruin a multi hour exposure.
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Looks like you've never done astronomy. A single satellite passing through the shot can saturate the sensor and ruin a multi hour exposure.
Looks like you have never done computers. It is trivial to substract the well known light effect of the sat.
I once made the mistake of shooting a twilight flat when it wasn't dark enough yet, and it took me 20 minutes to pump all of the electrons out of the CCD.
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Looks like you've never done astronomy. A single satellite passing through the shot can saturate the sensor and ruin a multi hour exposure.
The satellite would not be passing through the shot for the entire exposure. If you had software to detect and delete frames with a satellite moving through them, how many frames from a multi-hour exposure would have to be deleted? I assume it can even be done digitally in post-production, but even if you had to actually close the aperture ahead of the satellite crossing through your frame, we know exactly where the…