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Crypto-currency Craze 'Hinders Search For Alien Life' (bbc.com)
Scientists listening out for broadcasts by extra-terrestrials are struggling to get the computer hardware they need, thanks to the crypto-currency mining craze, a radio-astronomer has said. From a report: Seti (Search for Extraterrestrial Intelligence) researchers want to expand operations at two observatories. However, they have found that key computer chips are in short supply. "We'd like to use the latest GPUs [graphics processing units]... and we can't get 'em," said Dan Werthimer. Demand for GPUs has soared recently thanks to crypto-currency mining. "That's limiting our search for extra-terrestrials, to try to answer the question, 'Are we alone? Is there anybody out there?'," Dr Werthimer told the BBC. "This is a new problem, it's only happened on orders we've been trying to make in the last couple of months."
This is not SETI@Home, but SETI proper, where they need graphics cards to quickly analyze data, not wait for weeks or months. SETI@Home is high bandwidth, but terrible latency.
They are not looking for modulating of a star. No one is thinking an alien race is going to be modulating a star. Stars don't emit on the hydrogen line. Lord.
When looking for a frequency to search for transmissions on, you can't use nice round numbers and expect that those nice round numbers for us are going to be nice round numbers for them too. 1.000000GHz for us won't be 1.000000GWhatevers for them because every race will have a different measurement for time. So they look for frequencies that are built into the fabric of the universe and use those as the base reference, with the belief that if that idea makes sense for us it would make sense for others too. Hydrogen is the most basic element, the most abundant element in space, and the precession frequency of neutral hydrogen atoms (1.42ishGHz) is a radio frequency that propagates reasonably well. The hope is if that idea makes sense to us, it will make sense to an alien race who might be looking for a frequency to send on that others will think to listen to. Hydrogen line times pi is another one.