Searching for aliens

Allen Telescope array, California, which is part of the search for extraterrestrial intelligence.

SCIENTISTS and astronomers searching for aliens in other parts of the universe have released a catalogue of objects found in space that they hope could help them locate intelligent life.

Breakthrough Listen, an initiative to find signs of intelligent life in the universe, released its innovative catalogue of ‘Exotica’ this week. It contains a diverse list of objects of potential interest to astronomers searching for technosignatures, which might be a tell-tale sign of technology developed by extraterrestrial intelligence.

The catalogue collects over 700 distinct targets intended to include ‘one of everything’ in the observed universe - ranging from comets to galaxies, from mundane objects to the most rare and violent celestial phenomena.

The search for extraterrestrial intelligence (SETI) has been pursued as a serious scientific programme, though at times sporadically, for six decades.

In the last five years, Listen has massively increased the scope of radio (as well as optical) searches, and has developed technology, deployed at giant radio telescopes on three continents, that enables coverage of an unprecedented range of frequencies at high resolution.

                                                                                               

Is there intelligent life in the universe?

No confirmed technosignature has yet been detected and one obvious explanation is that the human race is alone in the universe. On the other hand, in such a vast cosmos it is certainly possible that astronomers have yet to look in the most likely places.

The new Exotica catalogue is the centrepiece of Listen's efforts to expand the diversity of targets and a key principle behind it is the concept of ‘survey breadth’ - the diversity of objects observed during a programme.

This should help astronomers constrain the range of potential habitats for extraterrestrial intelligence, as well as rule out the possibility that any phenomena widely considered natural are in fact artificial.

Conversely, it may identify natural events, or confounding data such as interference, that mimic the kinds of artificial signal SETI researchers are on the lookout for.

The Exotica catalogue contains four categories of astronomical object:

1) Prototypes: a list containing at least one example of every known kind of celestial object (apart from those too transient to present realistic observation targets). Planets and moons, stars at every point of their life cycle, galaxies big and small, serene star clusters and blazing quasars, and more are all included in the list.

2) Superlatives: objects with the most extreme properties. These include examples like the hottest planet, stars with unusually high or low metal content, the most distant quasar and fastest-spinning pulsar, and the densest galaxy.

3) Anomalies: enigmatic targets whose behaviour is currently not satisfactorily explained. For instance, the famous ‘Tabby's Star’ with its bizarre dimming behaviour; ‘Oumuamua’ - the interstellar object that passed near Earth in 2017; unexplained optical pulses that last mere nanoseconds; and stars with excess infrared radiation that could conceivably be explained as waste heat from alien megastructures.

4) A control sample of sources not expected to produce positive results.

Accompanying the catalogue is extensive discussion of classification of objects and a new classification system for anomalies, as well as plans for upcoming and potential observations based on this work.

"Breakthrough Listen has already greatly expanded the breadth and depth of its search," said Yuri Milner, founder of the Breakthrough Initiatives. "The publication of this catalogue is a new and significant step for the programme."

 Pete Worden, executive director of the Breakthrough Initiatives, added: "When it comes to the search for intelligent life, it's vital to have an open mind. Until we understand more about the forms another civilization and its technology could take, we should investigate all plausible targets. Cataloguing them is the first step toward that goal."

Dr Andrew Siemion, leader of the Breakthrough Listen science team at the University of California, Berkeley's SETI Research Center (BSRC), said: "Technosignature searches to date have largely focused on the search for 'life as we know it' on nearby stars - in particular those known to host planets with the potential for liquid water on their surfaces.

“The expanded search capabilities that Breakthrough Listen has made possible allow us to consider a much wider range of possible technology-laden environments.”

The new object list is the first in recent times that aims to span the entire breadth of astrophysics, from distant galaxies to objects in our own solar system. The Listen team has developed it conceptually, compiled it and shared it with the astronomical community in the hope that it can guide future surveys - whether studying life beyond Earth or natural astrophysics - and serve as a general reference work for the field.

Breakthrough Listen is a scientific programme in search for evidence of technological life in the universe. It aims to survey one million nearby stars, the entire galactic plane and 100 nearby galaxies at a wide range of radio and optical bands.

The Breakthrough Initiatives, a suite of scientific and technological programmes, were created by Yuri Milner to investigate life in the universe. Milner, an Israeli-Russian entrepreneur, venture capitalist and physicist, is also the founder of DST Global, a leading technology investor which boasts a portfolio that includes some of the world's most prominent internet companies.

This article by Clive Simpson was first published as a news item on the ROOM Space Journal website on 26 June 2020.

If leaving me is easy

THROUGH the lens of the global Covid-19 pandemic the uncertainty delivered by the EU referendum exactly four years ago today (17 June 2016) now seems to be growing worse by the day. And, for a government determined to follow its Brexit ideology at all costs, an unexpected virus has been the perfect smokescreen.

Back in 2016, promises proffered by the Vote Leave campaign won the day, albeit by the slimmest of margins. Those promises, however, have not only failed to materialise but have largely been exposed as a cache of blatant lies.

Despite the severest of economic storms generated by the coronavirus pandemic, it would seem that the British government, under the leadership of Boris Johnson, is happy to pursue either of two suicidal options - the most basic of severance arrangements with the EU or no deal at all.

With a final deadline for agreement all but ignored, Britain as a country stands on a precipice and is in grave danger of being driven into a black hole by manipulative and evil forces. Anyone who understands the physics of black holes will know there is no return from such a cosmic catastrophe.

Four years ago the PR spin and slogans of Vote Leave were carefully created to tap into a public mood of general dissatisfaction.

Blaming just about everything that was wrong with the country on a beleaguered EU worked well and one of the most dishonest and manipulative campaigns in political history, which also broke so many rules and regulations in the process, won the day.

In reality, extreme wealth and greed were the poisonous roots of a long-festering anti-EU drive. Much of this stemmed from the long anticipated ‘Anti Tax Avoidance Directive’ designed to ensure mega companies and billionaires pay a fair share of tax in their country of residence or operation, rather than be able to shift it to tax havens.

Surely this was a logical and sensible piece of legislation? But when this new directive was finally approved by 27 of the then 28 EU nations, it was the UK that abstained.

Since 2016, the real Brexit has gradually unfolded scene by scene, a tragedy of self-inflicted deprivation - the loss of rights, freedoms and privileges; the loss of standards and ethics; the loss of opportunity, jobs and prosperity; the loss of relationships, reputation and influence; the loss of dignity, humanity and diversity.

In complete opposite to the trite referendum campaign slogan “taking back control”, it has already heralded the loss of many of the country’s fundamental democracies and international respect and influence.

And, according to a Bloomberg Economics analysis, Brexit is on course to cost the UK more than its combined total of payments to the European Union budget over the past 47 years.

Four years on, as we look back with hindsight, one cannot fail to be struck by the transformation of politics and society. The Johnson government continues to put its pure Brexit ideology before the good of the country.

Now it hails a liberated UK. But if further chaos ensues from the start of next year when the transition period ends you can be sure the narrative will shift, probably to blame Covid-19 and the EU at the same time. To date Brexit has changed everything and served up nothing.

Happy EU referendum anniversary everyone!