The European Space Agency’s (ESA) Laser Interferometer Space Antenna (LISA) is scheduled for launch in 2034. The next-generation space instrument will be able to detect and measure gravitational waves – tiny ripples through the fabric of space-time. But a team of physicists has shocked the scientistic community by suggesting LISA could simultaneously eavesdrop on messages broadcast by advanced alien civilisations based around black holes.
LISA – the world’s first dedicated space-based gravitational wave detector – is a staggeringly ambitious project, comprise three spacecraft, arranged in a triangular formation, 2.5 million km apart.
A sophisticated extraterrestrial civilisation would decide to construct a device to study the massive black hole in the galactic centre
And researchers led by Professor Marek Abramowicz of Sweden’s University of Gothenburg believe a tweak to its operating procedures could see LISA play a pivotal role in finally discovering technologically advanced alien civilisation living in our galaxy.
Professor Abramowicz argues “a rare combination of circumstances” arising in life on Earth mean similar constraints will restrict the chances of other technologically competent alien life arising.
However the chance of alien life thriving somewhere remains possible, so they opt for a generous interpretation of the Drake Equation – the estimation of the number of communicative alien societies in the universe – suggesting the Milky Way galaxy could host a couple.
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Alien life search: Black Holes could be the base for technologically-advanced aliens
And a final assumption is that at least one of the alien societies will be significantly more technologically savvy than mankind.
Such an alien society will understand more about black holes, which are intimately tied up with the production of gravitational waves.
Sagittarius A*, the supermassive black hole at the centre of the Milky Way, is also, by definition, the centre of the local star region – a spot, Professor Abramowicz says, towards which any advanced alien will naturally look.
Thus, the researchers suggest, making some assumptions about alien life and thought, right next to Sagittarius A* – at the hole’s innermost stable circular orbit is the ideal location to communicate with the rest of the galaxy.
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Sending message using gravitational waves is the perfect medium, because “once emitted, they travel through space virtually unperturbed”.
The authors wrote: “Gravitational wave phenomena are omnipresent in the universe and with sufficient technological prowess relatively straightforward to detect.”
The same omnipresence, in a sense, will be a quality of the LISA detector.
LISA’s immense scale means it will be able to detect gravitational waves coming from anywhere, in any direction.
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And LISA will not be restricted to monitoring only one segment of the universe.
The researchers have called this hypothetical alien craft “The Messenger”.
To be recognised as consciously fashioned in origin, they note, the gravitational waves it emits must be “unambiguously artificial”.
Professor Abramowicz said: “In order to be recognised as such, a gravitational wave Messenger beacon must emit a clearly unnatural signal, such as a persistent emission of gravitational waves at a constant frequency.”
Of course, positioning anything close to a black hole is an incredibly dangerous plan.
Professor Abramowicz assumes, however, a considerable degree of technological prowess on the part of the aliens.
Indeed, they suggest, sending a gravitational wave message may only be a secondary function of the craft.
The researchers write: “We argue that if a sophisticated extraterrestrial civilisation would decide to construct a device to study the massive black hole in the galactic centre, or to extract energy from it, or even for intentions unfathomable to the human mind, this device can also serve as a Messenger.
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Mandanici Citt 224 d'Arte e Citt 224 a Vocazione Turistica Questo sito 232 dedicato a Mandanici con informazioni storiche, religiose, turistiche e amministrative.
We are working for you. the new website is coming Seleziona la lingua Iscriviti alla Newsletter.
A.S.D. Milano Baseball 1946. Sede Legale. Piazza Grandi, 22 20135 Milano. Partita IVA 03880330968 . [email protected]
Per motivi di ordine pubblico l'incontro del 15 maggio, dedicato a laureandi e laureati di Scienze Motorie e Sportive che intendono iscriversi ai corsi di laurea .
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