Mysterious Object 'Oumuama Was a Natural Body Visiting From Another Solar System
The team was made up of researchers from elsewhere in the UK, the US, Canada, Taiwan and Chile and in total seven researchers from Queen’s were involved.
Professor Alan Fitzsimmons headed up a team which measured the way that `Oumuamua, reflects sunlight, and found it similar to icy objects covered with a dry crust. This is because `Oumuamua has been exposed to cosmic rays for millions, or even billions, of years, creating an insulating organic-rich layer on its surface.
An artist’s impression shows the first interstellar asteroid, ‘Oumuamua. Observations show that this unique object was traveling through space for millions of years before its chance encounter with our star system
Credit: ESO/M.Kornmesser
Professor Alan Fitzsimmons commented: “We have discovered that the surface of `Oumuamua is similar to small solar system bodies that are covered in carbon-rich ices, whose structure is modified by exposure to cosmic rays.
“We have also found that a half-metre thick coating of organic-rich material could have protected a water-ice-rich comet-like interior from vaporizing when the object was heated by the sun, even though it was heated to over 300 degrees centigrade.”
Dr Michele Bannister and her team observed `Oumuamua while it was still within reach of the largest telescopes in the world and their findings are being published in Astrophysical Journal Letters later this month. They found the object was the same colour as some of the icy minor planets they had been studying in the outskirts of our solar system. This implies that different planetary systems in our galaxy contain minor planets like our own.
This is the interstellar object ‘Oumuamua (circled) as seen by the 4.2m William Herschel Telescope on La Palma. Background stars and galaxies appear as streaks due to the telescope following ‘Oumuamua as it moved across the sky.
Credit: A. Fitzsimmons, QUB/Isaac Newton Group, La Palma.
Working together, the researchers have been able to uncover some very important facts about `Oumuamua.
Dr Michele Bannister said: “We’ve discovered that this is a planetesimal with a well-baked crust that looks a lot like the tiniest worlds in the outer regions of our solar system, has a greyish/red surface and is highly elongated, probably about the size and shape of the Gherkin skyscraper in London.
“It’s fascinating that the first interstellar object discovered looks so much like a tiny world from our own home system. This suggests that the way our planets and asteroids formed has a lot of kinship to the systems around other stars.”
She added: “We are continuing our research into `Oumuamua and are hopeful that we will make more discoveries in the near future. Discoveries like this really help to give a little more insight into what’s out there and encourages people to look up and wonder.”
Emma Gallagher
Queen’s University Belfast
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“We have also found that a half-metre thick coating of organic-rich material could have protected a water-ice-rich comet-like interior from vaporizing when the object was heated by the sun, even though it was heated to over 300 degrees centigrade.”
fucking idiots, there is NOTHING that is a “dirty snowball” – all comets are now proven to be rock!