Jsou pulsary přírodní hodiny a byl objevený první pulsar signálem od mimozemšťanů?
“„Pulsary jsou tak přesné, že se používají jako přírodní hodiny. Některé se otočí i několikasetkrát za sekundu. Když byl objeven první pulsar, mysleli si vědci, že by to mohl být signál od mimozemšťanů, protože byl až podezřele pravidelný.“”
Summary
Pulsary mají extrémně stabilní periodu a jsou využívány jako přírodní časoměry. Některé, tzv. milisekundové pulsary, otáčejí se stovky až přes tisíckrát za sekundu. Při objevu prvního pulsaru v roce 1967 vědci skutečně zvažovali možnost mimozemského signálu, než byla pravidelnost vysvětlena přirozeným jevem.
Sources 60 searched
- The discovery of pulsars 1967 – Explaining Science
Not being a science person but a science fiction person, I always find something in your posts that sets off my story-idea button. This one was no exception. This time its using pulsars as a trans-galactic communications medium… · ** scurries away to think trans-galactic thoughts** 🙂
- Spinning Neutron Stars Observe Speed Limit | Science | AAAS
That conclusion is based on the fact that faster burst oscillations are never observed, even though continuous mass transfer from the companion star could easily spin a millisecond pulsar to thousands of revolutions per second.
- 'Extreme' Telescopes Find the Second-fastest-spinning Pulsar - NASA
Pulsar J0952-0607, highlighted near center right, rotates 707 times a second and now ranks as second-fastest pulsar known. The location of LOFAR’s first millisecond pulsar discovery, J1552+5437, which spins 412 times a second, is shown at ...
- Einstein's gravitational waves may set speed limit for pulsar spin | MIT News | Massachusetts Institute of Technology
Over millions of years, the pulsar slows down. Yet if the pulsar -- a dense star with strong gravitational attraction -- is in a binary system, then it can pull in, or accrete, material from its companion star.
- Pulsar - Wikipedia
On November 28, 1967, Bell and ... seconds. No astronomical object of this nature had ever been observed before. On December 21, Bell discovered a second pulsar, quashing speculation that these might be signals beamed at Earth from an extraterrestrial intelligence...
- PSR B1919+21 - Wikipedia
We did not really believe that we had picked up signals from another civilization, but obviously the idea had crossed our minds and we had no proof that it was an entirely natural radio emission.
- Wow! signal - Wikipedia
Despite numerous follow-up searches ... and comet hydrogen clouds), the signal has never recurred, and no explanation, terrestrial or otherwise, has been confirmed....
- Pulsar positioning system: a quest for evidence of extraterrestrial engineering | International Journal of Astrobiology | Cambridge Core
When Jocelyn Bell reported the strange signal to Antony Hewish in 1967, they thought the signal was man-made (Wade Reference Wade1975, 360c; Hewish Reference Hewish2008). After the human interference hypothesis was dismissed, the alien ...
- This Month in Physics History: | American Physical Society
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