Technology: Strange interstellar object 'Oumuamua is tiny and very reflective - PressFrom - US
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TechnologyStrange interstellar object 'Oumuamua is tiny and very reflective

18:47  18 november  2018
18:47  18 november  2018 Source:   engadget.com

A weird, cigar-shaped object flew through the solar system last year. Now astronomers may know where it came from.

  A weird, cigar-shaped object flew through the solar system last year. Now astronomers may know where it came from. In October 2017, astronomers saw a cigar-shaped rock called 'Oumuamua passing through our solar system. Scientists believe it's a comet that was kicked out of another star system. To find the comet's home, a recent study examined the motions of more than 7 million stars and located four candidates.

It could be that ' Oumuamua lost a lot of its surface dirt and dust as it passed near the Sun, which (combined with gas from the object itself) left it covered in reflective ice The object is now roughly as far from the Sun as Saturn, and that puts it too far away for study by current space telescopes.

Observations of ' Oumuamua indicate that it must be very elongated because of its dramatic variations in brightness as it tumbled through space. The history-making interstellar visitor ' Oumuamua is a relatively small and reflective object , a new study suggests.

Strange interstellar object 'Oumuamua is tiny and very reflective

After no small amount of mystery, we're starting to understand more about 'Oumuamua, the first known interstellar object to visit the Solar System. A newly published study indicates that the object can't be that large, for one thing. As the Spitzer Space Telescope's infrared detection couldn't catch the cigar-shaped entity, that makes it relatively small. It's likely less than half a mile (2,600 feet) at its longest. It also can't have a diameter larger than 1,440 feet, and that figure could be as small as 320 feet.

The research also found something unusual: it's extremely reflective, potentially up to 10 times more than Solar System comets. Just what caused this isn't certain, though. It could be that 'Oumuamua lost a lot of its surface dirt and dust as it passed near the Sun, which (combined with gas from the object itself) left it covered in reflective ice and snow. This happens with local comets, although not necessarily to this degree.

Mysterious interstellar object could be 'lightsail' sent from another civilization

Mysterious interstellar object could be 'lightsail' sent from another civilization NASA may have ruled that Oumuamua, the first interstellar object ever spotted in our system is a "metallic or rocky object" approximately 400 meters in length and 40 meters wide, but a new study from the Harvard Smithsonian Center for Astrophysics says it could be something much more exciting – it could be "a lightsail of artificial origin" sent from another civilization. require(["medianetNativeAdOnArticle"], function (medianetNativeAdOnArticle) { medianetNativeAdOnArticle.

NASA may have ruled that Oumuamua , the first interstellar object ever spotted in our system is a "metallic or rocky object " approximately 400 meters in length and 40 meters Scientists estimate the interstellar object ' Oumuamua is smaller and more reflective than most comets in the solar system.

A latest study indicates that the object cannot be that large, for one thing. As the Spitzer Space Telescope’s infrared detection was not able to catch the The research also found something really unusual: it’s a lot reflective , potentially up to 10 times more than Solar System comets.

There's one major problem with verifying details: it's likely too late. The object is now roughly as far from the Sun as Saturn, and that puts it too far away for study by current space telescopes. Whatever its exact nature, we may have to wait a long while to get more answers -- if we get any at all.

NASA, IOP.org

Oumuamua is the only interstellar object we’ve ever seen in our solar system. What is it?.
Harvard scientists recently speculated it could be an alien spaceship. It’s a fun thought, though extremely unlikely. In October 2017, astronomers operating the Pan-STARRS1 telescope in Maui found a bizarre cigar-shaped rock blazing its way through our solar system. The astronomers thought it might be an asteroid. But unlike the millions of known asteroids in our solar system, this one was traveling so fast — more than 70,000 miles per hour — that it couldn’t be captured by our sun’s gravity, the scientists reasoned.

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