‘Oumuamua is Back to Being an Interstellar Space Rock — For Now
July 7, 2019
It’s a comet! It’s an alien space ship! It’s an asteroid! It’s a space ship! It’s a weird comet! It’s a weird space ship! It’s a weird asteroid! It’s a (weird or otherwise) something else! It’s ‘Oumuamua, the interstellar space object that has mystified, enthralled and enraged astronomers, rocket scientists and the general public ever since it wagged its almost non-existent tail as made its turn around the sun and headed out to parts unknown before anyone could get a good look at it … which is just one of the problems that has caused the controversies and debates over what it is. The latest “this is what ‘Oumuamua REALLY is or isn’t” comes from the University of Maryland Department of Astronomy which contradicts all of those Giorgio Tsoukalos memes that say it’s definitely a spaceship. But do they know what it REALLY is?
“We have never seen anything like ‘Oumuamua in our solar system. It’s really a mystery still. But our preference is to stick with analogs we know, unless or until we find something unique. The alien spacecraft hypothesis is a fun idea, but our analysis suggests there is a whole host of natural phenomena that could explain it.”
In a report published in the current edition of the journal Nature Astronomy, Matthew Knight, an associate research scientist in the University of Maryland Department of Astronomy, reviewed all of the actual data collected up to and including the rear-end tracking that narrowed its origin down to one of four stars. Knight was one of the first to study ‘Oumuamua, co-authoring a study on its rotation and shapein December 2017 – just a few months after it was discovered.
“The alien-spacecraft camp threw the jets model out of the window.”
On his blog, co-author Sean Raymond lists the many “It’s aliens” arguments and attempts to scientifically debunk all of them. For example, it has comet-like outgassing which could both propel and spin it, but its small size makes it difficult to see. He also points out that we know so little about interstellar objects that ‘Oumuamua’s strange shape – which we still don’t know for sure if it’s cigar-like or maybe a weird pancake – could actually be pretty common. Nor do we know enough about how planets form to say many definitive things about how the ancillary space junk around them forms and how it might be kicked out of or escape from its solar system.
“We may start seeing a new object every year. That’s when we’ll start to know whether ‘Oumuamua is weird, or common. If we find 10 to 20 of these things and ‘Oumuamua still looks unusual, we’ll have to reexamine our explanations.”
Since we’re no longer getting new data from ‘Oumuamua, Knight is already looking to the Large Synoptic Survey Telescope (LSST) to help spot future interstellar objects earlier and get better looks and more data on them. Sending a space probe to meet up with one is still pretty far out in the future.
So, we still don’t know for sure what ‘Oumuamua is. Does this new study convince you that it’s not an alien spaceship or probe?
Or is this study a cover-up of what it really is? Tom DeLonge? Any thoughts?
https://mysteriousuniverse.org/2019/07/oumuamua-is-back-to-being-an-interstellar-space-rock-for-now/
科學家們對雪茄形太空物體得出結論：並非外星飛船
2019-07-02
據路透社7月2日報道，天文學家們獲得共識，近期備受關注的一個神秘雪茄狀天體，雖然仍然無法對它進行準確分類，但可以確定它並不是外星飛船。這一造訪太陽系的星際物體，是由美國夏威夷的天文望遠鏡於2017年10月19日發現的。此後智利超大望遠鏡和世界各地的其他天文台進行了觀測。
它奇特的雪茄形狀和運動軌跡，使一些科學家懷疑其具體屬性。但在仔細研究了這些數據後，一個國際研究小組得出結論：「我們沒有發現令人信服的證據證明這一物體與外星人有關。」科學家們從2017年10月14日到2018年1月2日一直在追蹤這一紅色的天體。在那之後，即使使用最強大的望遠鏡也無法探測到這一天體。據估計，它有800米長，在太空中不斷翻滾。「我們的關鍵發現是，這一天體性質與其它自然天體一致，與外星人相關的說法是沒有根據的。」馬利蘭大學天文學家奈特在《自然天文學》上發表了這項研究的報告。他補充說：「如果它突然出現一個無法解釋的轉彎，那我們肯定需要進一步的探索。」奈特說，要把這一天體歸入人們熟悉的類別（比如彗星或小行星）並不容易。他解釋說，這一天體「不知何故從一個遙遠的恆星系統中噴射出來，穿越星際空間和我們的太陽系。它稍稍偏離了一條完全可以由太陽引力來解釋的軌道。這是因為一些研究人員指出，很明顯它的表面有非常小的氣體排放，這表明它是一顆彗星，儘管任何這種排放都非常小，以至於無法被探測到（但仍改變了軌跡）。」研究人員甚至宣稱：「它是一個很小的行星」，或者一個行星的組成部分，或者是一個在遙遠的恆星系統中形成的碎片。
https://kknews.cc/science/ml8akep.html
沒有留言:
發佈留言