+ Reply to Thread
Page 2 of 2 FirstFirst 1 2
Results 21 to 28 of 28

Thread: Interstellar object ’Oumuamua confirmed to be from another solar system

  1. Link to Post #21
    UK Avalon Founder Bill Ryan's Avatar
    Join Date
    7th February 2010
    Thanked 269,547 times in 19,901 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    And earlier, from Linda Howe:

    Oumuamua — Comet? Asteroid? Other? Changing Speed and Course
    1 July 2018.

    • “What’s most surprising is that we’ve never seen interstellar objects pass through (our solar system) before.” – Karen Meech, Ph.D., Astronomer, Institute for Astronomy, University of Hawaii, Honolulu
    • “Unexpectedly, we found that Oumuamua was not slowing down as fast as it should have under gravitational forces alone.” – Marco Micheli, Ph.D., Astronomer, European Space Agency, and Author of Oumuamua paper, June 27, 2018, Nature
    On October 19, 2017, the first interstellar object ever seen by humans on Earth called A/2017 U1 or “Oumuamua” came through our solar system at thousands of miles an hour. Oumuamua in Hawaian means “scout or leader in a battle.”

    It was discovered by astronomer Robert Weryk using the Pan-STARRS telescope at Haleakala Observatory, Hawaii, on October 19, 2017, 40 days after it passed its closest point to the Sun. When first seen in September 2017, it was about 33,000,000 km (21,000,000 mi) from Earth (about 85 times as far away as the Moon), and already heading away from the Sun. Since there was no tail, scientists decided it was not a comet. But no one got any actual images to study. The images distributed on the internet are all computer models. Allegedly astronomers didn’t have time to turn telescopes on the foreign visitor fast enough to get either good images or even detailed spectroscopy of what it was made of.

    “This is the most extreme orbit I have ever seen,” said Davide Farnocchia, a scientist at NASA’s Center for Near-Earth Object Studies (CNEOS) at the agency’s Jet Propulsion Laboratory in Pasadena, California. “It is going extremely fast (the unusual object increased speed and altered orbit) on such a trajectory that we can say with confidence that this object is on its way out of the solar system and not coming back.”

    The CNEOS team plotted the object’s current trajectory and even looked into its future. Oumuamua (A/2017 U1) came from the direction of the constellation Lyra, cruising through interstellar space at a brisk clip of 56,880 miles per hour (15.8 miles/second or 25.5 kilometers/ second.)

    Pulled by the Sun’s gravity, the object made a hairpin turn under our solar system, passing under Earth’s orbit on Oct. 14, 2017, at a distance of about 15 million miles (24 million kilometers) -— about 60 times the distance to the Moon. It then shot back up above the plane of the planets and increased its speed to 97,200 miles an hour (27 miles per second or 44 kilometers/second) with respect to the Sun. Oumuamua left our solar system speeding toward the constellation Pegasus.

    “We have long suspected that these interstellar objects should exist, because during the process of planet formation a lot of material should be ejected from planetary systems. What’s most surprising is that we’ve never seen interstellar objects pass through before,” said Karen Meech, an astronomer at the Institute for Astronomy at the University of Hawaii in Honolulu, specializing in small bodies and their connection to solar system formation.
    “Oumuamua is a small object, estimated to be about 230 by 35 meters (800 ft × 100 ft) in size. It has a dark red color, similar to objects in the outer Solar System, such as Sedna. Oumuamua showed no signs of a comet tail despite its close approach to the Sun, but has since undergone non-gravitational acceleration consistent with comet outgassing. It has significant elongation and rotation rate, so it is thought to be metal-rich with a relatively high density. Oumuamua is tumbling, rather than smoothly rotating, and is moving so fast relative to the Sun that there is no chance it originated in the Solar System. It also means that Oumuamua cannot be captured into a solar orbit, so it will eventually leave the Solar System and resume traveling through interstellar space. Oumuamua’s system of origin and the amount of time it has spent traveling amongst the stars are unknown.”
    I interviewed Prof. Avi Loeb, Ph.D., Chairman of the Astronomy Department at Harvard University, who along with other scientists, were listening for any signals from the object because there were some speculations that it might be artificial in origin, a scout craft camouflaged as an asteroid or comet. By December 2017, planetary scientist Alan Fitzsimmons of Queen’s University Belfast in the U. K. reported that Oumuamua’s “surface is similar to small solar system bodies that are covered in carbon-rich ices, whose structure is modified by exposure to cosmic rays. They developed a model of the thermal properties of Oumuamua and determined that half-meter thick mantle of organic-rich material could have protected a water-ice-rich comet-like interior from vaporising when the object was heated by the sun.”

    Comet or Asteroid Or?

    Then at the end of June 2018, astronomer Marco Micheli from the European Space Agency and lead author of a new study in the journal Nature, hypothesized that Oumuamua was neither an asteroid nor an alien spacecraft, but was “a small interstellar comet. … Unexpectedly, we found that Oumuamua was not slowing down as fast as it should have under gravitational forces alone.” So his calculations pointed to outgassing from materials on Oumuamua’s surface that were too small to be seen when it whizzed by Earth, but enough outgassing to affect the interstellar object’s speed and trajectory.

    However, another astronomer, Alan Jackson, Ph.D., at the University of Toronto – Scarborough, argues Oumuamua didn’t have enough ice to be a comet, even if it started out as one. “Oumuamua thus seems to be in that ambigous region between an asteroid and a comet” and more like an elongated asteroid when it visited our solar system.
    Last edited by Bill Ryan; 30th September 2018 at 16:27.

  2. The Following 13 Users Say Thank You to Bill Ryan For This Post:

    avid (30th September 2018), Bob (30th September 2018), DeDukshyn (30th September 2018), Foxie Loxie (30th September 2018), gaiagirl (30th September 2018), ichingcarpenter (30th September 2018), Ivanhoe (2nd October 2018), Joe from the Carolinas (30th September 2018), meeradas (30th September 2018), Noelle (30th September 2018), shaberon (2nd October 2018), Sunny-side-up (10th November 2018), Valerie Villars (30th September 2018)

  3. Link to Post #22
    United States Avalon Member
    Join Date
    1st April 2016
    Thanked 4,853 times in 1,277 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    Interesting, I am not sure, but the trajectory appears to come in kind of dropping down and then rise above the ecliptic.

    I think the solar system itself moves fairly close to the sun's north, or, approximately a right angle above the ecliptic.

    This has it appearing to use the earth as a slingshot, in a relative direction as from above. I cannot be sure if that is the right way of seeing it, but it has at least some suggestive appearance of bouncing out of hell. Pretty sure it's "under" from the sun to the earth there. So this is an orbit more in a polar plane than an equatorial one.

  4. The Following 3 Users Say Thank You to shaberon For This Post:

    Foxie Loxie (2nd October 2018), Noelle (2nd October 2018), sunwings (3rd October 2018)

  5. Link to Post #23
    UK Avalon Member sunwings's Avatar
    Join Date
    23rd May 2016
    Thanked 3,362 times in 484 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    In October 2017, astrobiologist Karen J. Meech got the call every astronomer waits for: NASA had spotted the very first visitor from another star system. The interstellar comet -- a half-mile-long object eventually named `Oumuamua, from the Hawaiian for "scout" or "messenger" -- raised intriguing questions: Was it a chunk of rocky debris from a new star system, shredded material from a supernova explosion, evidence of alien technology or something else altogether? In this riveting talk, Meech tells the story of how her team raced against the clock to find answers about this unexpected gift from afar.

  6. The Following 2 Users Say Thank You to sunwings For This Post:

    Foxie Loxie (3rd October 2018), Noelle (3rd October 2018)

  7. Link to Post #24
    Netherlands Avalon Member
    Join Date
    19th April 2013
    Thanked 147 times in 31 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    Cigar-shaped interstellar object may have been an alien probe, Harvard paper claims

    (CNN)A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.

    The object, nicknamed 'Oumuamua, meaning "a messenger that reaches out from the distant past" in Hawaiian, was discovered in October 2017 by the Pan-STARRS 1 telescope in Hawaii.

    Since its discovery, scientists have been at odds to explain its unusual features and precise origins, with researchers first calling it a comet and then an asteroid before finally deeming it the first of its kind: a new class of "interstellar objects."
    A new paper by researchers at the Harvard Smithsonian Center for Astrophysics raises the possibility that the elongated dark-red object, which is 10 times as long as it is wide and traveling at speeds of 196,000 mph, might have an "artificial origin."
    "'Oumuamua may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization," they wrote in the paper, which has been submitted to the Astrophysical

    Journal Letters.

    The theory is based on the object's "excess acceleration," or its unexpected boost in speed as it traveled through and ultimately out of our solar system in January.
    "Considering an artificial origin, one possibility is that 'Oumuamua is a light sail, floating in interstellar space as a debris from an advanced technological equipment," wrote the paper's authors, suggesting that the object could be propelled by solar radiation.
    The paper was written by Abraham Loeb, professor and chair of astronomy, and Shmuel Bialy, a postdoctoral scholar, at the Harvard Smithsonian Center for Astrophysics. Loeb has published four books and more than 700 papers on topics like black holes, the future of the universe, the search for extraterrestrial life and the first stars.

    The paper points out that comparable light-sails exist on Earth.
    "Light-sails with similar dimensions have been designed and constructed by our own civilization, including the IKAROS project and the Starshot Initiative. The light-sail technology might be abundantly used for transportation of cargos between planets or between stars."

    In the paper, the pair theorize that the object's high speed and its unusual trajectory could be the result of it no longer being operational.
    Meet 'Oumuamua, the first observed interstellar visitor to our solar system
    Meet 'Oumuamua, the first observed interstellar visitor to our solar system
    "This would account for the various anomalies of 'Oumuamua, such as the unusual geometry inferred from its light-curve, its low thermal emission, suggesting high reflectivity, and its deviation from a Keplerian orbit without any sign of a cometary tail or spin-up torques."

    'Oumuamua is the first object ever seen in our solar system that is known to have originated elsewhere.
    At first, astronomers thought the rapidly moving faint light was a regular comet or an asteroid that had originated in our solar system.
    Comets, in particular, are known to speed up due to "outgassing," a process in which the sun heats the surface of the icy comet, releasing melted gas. But 'Oumuamua didn't have a "coma," the atmosphere and dust that surrounds comets as they melt.
    Multiple telescopes focused on the object for three nights to determine what it was before it moved out of sight.

    "We are fortunate that our sky survey telescope was looking in the right place at the right time to capture this historic moment," NASA Planetary Defense Officer Lindley Johnson said in a statement last year. "This serendipitous discovery is bonus science enabled by NASA's efforts to find, track and characterize near-Earth objects that could potentially pose a threat to our planet."

    Is this just fantasy?
    Other mysteries in space have previously been thought of as signs of extraterrestrial life: a mysterious radio signal, repeating fast radio bursts and even a strangely flickering star, known as Tabby's Star.
    The mysterious radio signal was later determined to be coming from Earth, the repeating fast radio bursts are still being investigated, and new research suggests that Tabby's Star is flickering because of dust -- rather than being an alien megastructure.
    So what does that mean for 'Oumuamua?
    "I am distinctly unconvinced and honestly think the study is rather flawed," Alan Jackson, fellow at the Centre for Planetary Sciences at the University of Toronto Scarborough, wrote in an email. "Carl Sagan once said, 'extraordinary claims require extraordinary evidence' and this paper is distinctly lacking in evidence nevermind extraordinary evidence."
    Jackson published a paper in the Monthly Notices of the Royal Astronomical Society in March that suggests that 'Oumuamua came from a binary star system, or a system with two stars.
    Jackson said the spectral data from 'Oumuamua looks like an asteroid or a comet, while that of a solar sail would look very different. The new paper proposes that the sail has been coated in interstellar dust, which obscures its true spectral signature.
    "Any functional spacecraft would almost certainly retract its solar sail once in interstellar space to prevent damage," Jackson said. "The sail is useless once away from a star so there would be no reason to leave it deployed. If it was then deployed again on entering the solar system it would be pristine. Even if it was left deployed the dust accumulation would be primarily on the leading side like bugs on a windshield."
    'Oumuamua also travels in a complex tumbling spin, but a functioning solar sail would have a much smoother path and obvious radiation-driven acceleration, Jackson said. Even the spinning motion of a damaged solar sail would be far more strongly influenced by the radiation forces than seen, he explained.
    The solar sail would also be thinner than the authors of the new paper describe, he said.
    "The sail on IKAROS is 7.5 micrometres thick with a mass of only 0.001g/cm^2, 100 times lower than their estimate," Jackson said. "While a combined spacecraft and sail could have a higher net mass the sail itself needs to be extremely light. That would also significantly change their estimate for how far it could travel before falling apart -- though as I said, I doubt any functional craft would leave its sail deployed in interstellar space."
    Solar sails also can't change course after being launched, so if 'Oumuamua was truly a solar sail, it would be traceable back to its origin. So far, there is no obvious origin for 'Oumuamua.
    "Beyond that, it becomes difficult to trace because of the motion of the stars and any hypothetical alien civilisation would face the same issue in charting a course that long in the first place (aside from arguments about whether they would want to launch a craft they knew would not reach its destination for many millions of years)," Jackson said.


    ¤=[Post Update]=¤

    This is starting to look alot at soft disclosure to me! In the same week im going to see David Icke for the first time. Interesting times people!

  8. The Following 3 Users Say Thank You to Mypos For This Post:

    avid (9th November 2018), Bill Ryan (6th November 2018), MistressJan (7th November 2018)

  9. Link to Post #25
    France Avalon Member Elandiel BernElve's Avatar
    Join Date
    3rd June 2010
    Thanked 411 times in 108 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    Watch from 9:50 the intro is boring and the images speak for themselves.
    Just sayin..

    Since a week or two i've been intensely studying the subject of system x and you know what, I don't bother to go through the effort of proving all the facts and evidence out there right now. I think I will at a later stage.
    But whatever you want call it, planet x, nemesis, nibiru, it's out there, and visibile in plain sight at set times. I don't know what it will bring or do but it's there. It all makes sense.

    So, could this be another cover or diversions story for the incoming system, are they seeding our subconsciousness?
    It sure drifts attention away from the more obvious discovery in our heavens

    Disclosure is beginning because Nibiru is becoming visible too easily nowadays

    By the way it doesn't make me less excited about the news of the finding of this space cigar
    Last edited by Elandiel BernElve; 9th November 2018 at 22:29.
    Capitaine Elandiel BernElve

  10. Link to Post #26
    England Avalon Member Did You See Them's Avatar
    Join Date
    15th October 2015
    Thanked 3,882 times in 635 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    "The 'Oumuamua Mystery May Not Be So Mysterious After All"

    he first interstellar object to visit the Solar System “defied expectations” in 2017, according to a new study, and brought about lots of questions, including whether it was a comet or an asteroid (or, as some people wanted to believe, an alien spaceship). Though some studies have determined it was an asteroid, new research finds that the comet hypothesis might still be plausible.

    ‘Oumuamua first appeared on 19 October 2017, in data from the Hawaiian Pan-STARRS telescope. Rather than orbiting the Sun, its trajectory clearly implied that it had visited from outside the Solar System and then left. Though it didn’t stay for long, scientists were able to make 818 observations of the object and found a few strange things. It had an elongated shape with a complex rotation. And strangely, it was accelerating as it sped off—more than what would be caused by the effects of the Sun’s gravity alone.

    Debate has raged as to whether the rock is a comet, an icy body from the outer regions of a star system with a sort of fuzzy atmosphere and a tail; an asteroid, a rock without a tail that formed closer to its star; or something else entirely. Even though the release of gas from the surface (like from a comet) could have explained the anomalous acceleration, ‘Oumuamua didn’t have an observable tail or observable carbon gas spewing from its surface. This made scientists wonder if maybe it was something else—maybe even a flat object like a solar sail accelerating thanks to a push from the Sun’s particles.

    But a new paper from Yale’s Darryl Seligman and Greg Laughlin and CalTech’s Konstantin Batygin, slated to be published in The Astrophysical Journal, puts the brakes on this speculation. It reiterates that “a volatile-rich gas-venting structure for ‘Oumuamua provides the simplest explanation for its odd trajectory.” In other words, even though we didn’t see the gas or tail, it otherwise looks just like a comet.

    This paper simulated an elongated pill- or capsule-shaped object emitting a nozzle-like jet of vaporised particles, mostly water vapour, which might explain why we didn’t see any tail. The model produced results that looked much like those observed in ‘Oumuamua, including the tumbling behaviour and extra acceleration.

    Unsurprisingly, initial opponents of the comet hypothesis aren’t convinced by the new results (are people ever convinced by opposing arguments anymore?), reports Scientific American’s Lee Billings. Harvard’s Avi Loeb said that the new findings are based on the assumption that extrasolar objects act like Solar System objects, while the University of Cambridge’s Roman Rafikov said the paper requires the comet to be an ideal shape.

    So, not much has changed, and astronomers still disagree about the nature of ‘Oumuamua. Hopefully, more interstellar objects will visit the Solar System soon, providing us with more to study and debate over.


  11. The Following User Says Thank You to Did You See Them For This Post:

    Bill Ryan (2nd July 2019)

  12. Link to Post #27
    England Avalon Member Did You See Them's Avatar
    Join Date
    15th October 2015
    Thanked 3,882 times in 635 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    Tuesday 2 July 2019

    Cigar-shaped interstellar object 'not an alien spaceship'

    After poring over data, a team of researchers wrote that "we find no compelling evidence to favour an alien explanation".

    Scientists say a mysterious cigar-shaped object spotted speeding through the solar system in 2017 is probably not an alien spaceship.

    However, after investigating the nature of the object called Oumuamua, astronomers still remain uncertain over how to classify it.

    Oumuamua's odd shape and motion had prompted some scientists to wonder whether it was some form of alien technology exploring the cosmos.

    But after poring over the data, an international team of researchers wrote that "we find no compelling evidence to favour an alien explanation".

    Scientists tracked the reddish-coloured Oumuamua from 14 October 2017 until 2 January 2018, after which it became too faint to detect even with the most powerful telescopes.

    "Our key finding is that Oumuamua's properties are consistent with a natural origin, and an alien explanation is unwarranted," said University of Maryland astronomer Matthew Knight, co-leader of the research published in the Nature Astronomy.

    "Yes, if it made a sudden, unexplainable turn that would certainly have warranted further exploration," Mr Knight added.

    More: https://news.sky.com/story/cigar-sha...eship-11752929
    Last edited by Did You See Them; 2nd July 2019 at 10:21.

  13. The Following 3 Users Say Thank You to Did You See Them For This Post:

    Bill Ryan (2nd July 2019), Constance (2nd July 2019), earthdreamer (4th September 2019)

  14. Link to Post #28
    Avalon Member Star Tsar's Avatar
    Join Date
    10th December 2011
    Orion Arm
    Thanked 34,343 times in 11,955 posts

    Default Re: Interstellar object ’Oumuamua confirmed to be from another solar system

    From the astronomy department @ Yale

    Quote Posted by Star Tsar (here)
    John Michael Godier's Event Horizon

    Darryl Seligman | Will There Be Another Oumuamua?

    Published 2nd September 2019

    Where is Oumuamua?
    A new interview with Darryl Seligman from the astronomy department at Yale with an update on the subject of Oumuamua. We detail his findings that the interstellar object Oumuamua is an extremely strange object with unknown origins, though there has been some progress in determining it’s shape and composition. Also, ESO has decided on a comet intercept mission that will target interstellar object over the next decade.

    Mysterious 'Oumuamua interstellar object may have simple explanation after all


    On the Anomalous Acceleration of 1I/2017 U1 `Oumuamua


    The Mysterious Interstellar Object Omuamua With Harvard’s Dr. Avi Loeb

    I for one will join in with anyone, I don't care what color you are as long as you want to change this miserable condition that exists on this Earth - Malcolm X / Tsar Of The Star

  15. The Following 2 Users Say Thank You to Star Tsar For This Post:

    Did You See Them (3rd September 2019), earthdreamer (4th September 2019)

+ Reply to Thread
Page 2 of 2 FirstFirst 1 2

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts