Summary
Astronomers have identified an unusual object, dubbed Oumuamua, as the first known interstellar visitor to our solar system. Discovered on October 19, the object was initially thought to be a comet but was later confirmed to have originated from outside the solar system after extensive observations. Oumuamua, which means "a messenger from afar" in Hawaiian, is highly elongated and exhibits a tumbling motion, suggesting a complex history, possibly involving a major collision.
Researchers from Leiden Observatory have proposed three hypotheses regarding Oumuamua's origins. The first suggests it may have originated from our own Kuiper Belt or Oort cloud, but this is deemed unlikely due to its high speed. The second hypothesis posits that it was ejected from a nearby star system, specifically TYC 4742-1027-1, about 1.3 million years ago. The third and most favored explanation is that Oumuamua is part of a vast population of debris in interstellar space, with estimates suggesting there could be around 700 trillion similar objects in our solar neighborhood.
Oumuamua's trajectory indicates it will exit the solar system in approximately 20,000 years, heading towards the constellation Pegasus. While it will soon become invisible to our telescopes, future advancements in observational technology, such as the Large Synoptic Survey Telescope, are expected to enhance our ability to detect more interstellar objects.
Show Notes
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 13-12-17We were recently visited by a traveler from outside our solar system. This is the first time we’ve ever seen an object that came to us from interstellar space. It's name is 'Oumuamua. Check out http://curiositystream.com/spacetime You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time tshirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFacebook: facebook.com/pbsspacetimeEmail us! pbsspacetime [at] gmail [dot] comComment on Reddit: http://www.reddit.com/r/pbsspacetimeHelp translate our videos!https://www.youtube.com/timedtext_cs_...Previous Episode:Understanding the Uncertainty Principle with Quantum Fourier Serieshttps://www.youtube.com/watch?v=izqaWyZsEtYIn this Space Time Journal Club we look into the origins of 'Oumuamua, an asteroid visiting us from beyond our solar system! We'll focus on the results of:"The origin of interstellar asteroidal objects like 1I/2017 U1"Portegies Zwart, Pelupessy, Bedorf, Cai and Torres 2017https://arxiv.org/abs/1711.03558On October 19th this year astronomers spotted an object moving rapidly away from the sun. The discovery was made by Pan-STARRS - the Panoramic Survey Telescope and Rapid Response System: a group of telescopes that constantly monitor the sky for moving or variable objects like asteroids or comets, It was initially thought to be a new comet, but after 34 days of follow up observations and a bit of orbital mechanics, it became abundantly clear that we were looking at the first object ever observed that came from outside our solar system. The mysterious object has been dubbed 1I: the first object in a brand new International Astronomical Union class, with “I” standing for “interstellar”. 1I also scored a more poetic name: 'Oumuamua, from the Hawaiian meaning “a messenger from afar arriving fast”. Hosted by Matt O'DowdWritten by Drew Rosen and Matt O'DowdProduced by Rusty WardGraphics by Kurt RossAssistant Editing and Sound Design by Mike PetrowMade by Kornhaber Brown (www.kornhaberbrown.com)Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big BangCoolAsCatsDavid NicklasWilliam James SidisQuasarTambe BarsbayMayank M. MehrotaMars YenturMark RosenthalDean FuquaY2Justin LloydTambe BarsbayHypernovaEdmund FokschanerMax LevineMatthew O’ConnorEugene LawsonMartha HuntJoseph SalomoneChuck ZegarJordan YoungRatfeastJohn HofmannThanks to our Patreon Gamma Ray Burst Supporters: Mechanically CrypticDenys IvanovNick VirtueAlexey EromenkoNicholas RoseScott GossettMark DykstraChris HicksMark VasilePatrick MurraySultan AlkhulaifiAlex SetoMichal-Peanut KarmiErik SteinDaniel LyonsKevin WarneJJ BagnellJ RejcAmy JieAvi GoldfingerJohn PettitShannan CatalanoFlorian StiglmayrBenoit Pagé-GuitardNathan LenizJessica FraleyLoro LukicBrandon LabonteDavid CraneGreg Weiss Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 17-08-20Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/Sign up for the mailing list to get episode notifications and hear special announcements!https://mailchi.mp/1a6eb8f2717d/spacetimeOur galaxy is full of dysfunctional stellar relationships. With more than half of all stars existing in binary orbits, it’s inevitable that many stellar remnants will end up in parasitic spirals with their partners. Today we’re going to look at the worst of these - from the novae produced by white dwarfs, to X-ray binaries created by neutron stars and black holes - and much weirder things besides. Hosted by Matt O'DowdWritten by Matt O'DowdGraphics by Leonardo Scholzer, Yago Ballarini, and Pedro OsinskiDirected by: Andrew KornhaberCamera Operator: Bahaar GholipourExecutive Producers: Eric Brown and Andrew KornhaberEnd Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0QSpecial Thanks to our Patrons! Big Bang SupportersRobert DoxtatorAhmad JodehCaed AldwychRadu NegulescuAlexander TamasMorgan HoughJuan BenetFabrice EapMark RosenthalDavid NicklasQuasar SupportersAlec S-LChristina OegrenMark HeisingVinnie FalcoHypernova Supporterswilliam bryanDrew HartJustin JermynJason FinnАнтон КочковJulian TyackeTimothy McCullochSyed AnsarJohn R. SlavikMathewDanton SpiveyDonal BotkinJohn PollockEdmund FokschanerJoseph SalomoneHank SMatthew O'Connorchuck zegarJordan YoungJohn HofmannGamma Ray Burst SupportersMichael BartonChristopher BarronJames RamseyMr TAndrew MannJeremiah Johnsonfieldsa eleanoryCody LubinskyPeter MertzKevin O'ConnellBryan DawleyRichard DeightonIsaac SuttellDevon RosenthalOliver FlanaganDawn M FinkBleys GoodsonDarryl J LyleRobert WalterjechamtBruce BIsmael MontecelM DMark Daniel CohenAndrew RichmondSimon OliphantMirik GogriDavid HughesAria AhmadBrandon LattinYannick WeynsNickolas Andrew FreemanProtius ProtiusBrian BlanchardShane CalimlimTybie FitzhughPatrick SuttonRobert IlardiEric KieblerTatiana VorovchenkoCraig StonahaMichael ConroyGraydon GossFrederic SimonGreg SmithSean WarniahaTonyfaceJohn RobinsonA GKevin LeeAdrian HatchYurii KonovaliukJohn FunaiCass CostelloGeoffrey ShortBradley JenkinsKyle HoferTim StephaniLuaanAlecZeroMalte UblNick VirtueScott GossettDavid BethalaDan WarrenJohn GriffithDaniel LyonsJosh ThomasDFaulkKevin WarneAndreas NautschBrandon Labonte Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 20-06-18Thank you to Brilliant for sponsoring this episode! To find out more, visit: https://brilliant.org/SpaceTimeWe’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information. You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time t-shirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFacebook: facebook.com/pbsspacetimeEmail us! pbsspacetime [at] gmail [dot] comComment on Reddit: http://www.reddit.com/r/pbsspacetimeHelp translate our videos!https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7gPrevious Episode:Why Quantum Information is Never Destroyed https://youtu.be/HF-9Dy6iB_4These ideas are pretty mind-blowing, but as crazy as black holes are, they’re also kind of … simple. Don’t get me wrong; the math is complicated. But the objects themselves are simple. In fact every black hole in the universe, no matter how it formed or what happened to it afterwards, can be perfectly described with only three properties. Those properties are mass, angular momentum, and electric charge. Or at least this is the proposition behind the famous no-hair conjecture, or no-hair theorem. Hosted by Matt O'DowdWritten by Matt O'DowdGraphics by Grayson BlackmonAssistant Editing and Sound Design by Mike Petrow and Linda HuangMade by Kornhaber Brown (www.kornhaberbrown.com)Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big BangCoolAsCatsDavid NicklasAnton LifshitsJoey RednerFabrice EapQuasarTambe BarsbayMayank M. MehrotaMars YenturMark RosenthalDean FuquaRoman PinchukColeslawPurdieHypernovaEdmund FokschanerMatthew O’ConnorEugene LawsonBarry HatfieldMartha HuntJoseph SalomoneChuck ZegarCraig PetersonJordan YoungRatfeastJohn HofmannThanks to our Patreon Gamma Ray Burst Supporters: James HughesFabian OlesenKris FernetJane MeyersJames FlowersGreg AllenDenys IvanovNick VirtueAlexey EromenkoNicholas RoseScott GossettMark VasilePatrick MurraySultan AlkhulaifiAlex SetoMichal-Peanut KarmiErik SteinKevin WarneJJ BagnellAvi GoldfingerJohn PettitFlorian StinglmayrBenoit Pagé-GuitardNathan LenizBrandon LabonteDavid CraneGreg WeissShannan CatalanoBrandon Cook Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 19-08-19Check out the new Space Time Merch Store!https://pbsspacetime.com/Support Space Time on Patreonhttps://www.patreon.com/pbsspacetimeWe actually have a pretty good idea of what might have happened before the Big Bang. That is, as long as we define the Big Bang as the extremely hot, dense, rapidly expanding universe that is described by Einstein’s equations. That picture of the universe is very solid down to about a trillionth of a second after the supposed beginning of time. We can make good guesses down to about 10^-30th of a second. But before that? Hosted by Matt O'DowdWritten by Matt O'DowdGraphics by Leonardo ScholzerDirected by Andrew KornhaberProduced By: Kornhaber BrownCheck out the Big Bang and Cosmic Inflation Playlist to learn Morehttps://www.youtube.com/watch?v=aPStj2ZuXug&list=PLsPUh22kYmNCc3WCKb5yF136QSRf0xErmWant Even More Great Space Content? Check out the Exciting STELLAR Playlist https://www.youtube.com/playlist?list=PL1mtdjDVOoOqY7QPHGa9OppO_pjf91lbVBig Bang Supporters:Alexander TamasAnton LifshitsDavid NicklasFabrice EapJuan BenetMorgan HoughQuasar Supporters:Mark HeisingMark RosenthalVinnie FalcoHypernova Supporters:Chuck ZegarDanton SpiveyDonal BotkinEdmund FokschanerHank SJohn HofmannJohn R. SlavikJordan YoungJoseph SalomoneMatthewMatthew O'ConnorSyed Ansar Gamma Ray Burst Supporters: Adrien HatchAdrian MolyneuxAlexey EromenkoAndreas NautschBradley JenkinsBrandon LabonteCarlo MogaveroDan WarrenDaniel LyonsDavid BehtalaDFaulkDustan JonesGeoffrey ShortJames FlowersJames QuinteroJohn FunaiJohn PollockJonahJonathan NesfederJoseph DillmanJosh ThomasKevin WarneKyle HoferMalte UblMark VasileNathan HitchingsNicholas NachefskiNick VirtuePaul RoseScott GossettSigurd Ruud FrivikTaras VozniukTim JonesTim StephaniYurii Konovaliukسلطان الخليفي Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices