'Oumuamua, which was spotted in October 2017, a month after it had made its closest approach to the Sun and was travelling back out of the Solar System, is in fact really weird – even aside from the fact that it has been travelling for hundreds of millions of years across the vastness of space.
‘Oumuamua is now outside the orbit of Mars. Nobody knows for sure where 'Oumuamua came from or how long it's been voyaging through deep space. These properties suggest that ‘Oumuamua is dense, composed of rock and possibly metals, has no water or ice, and that its surface was reddened due to the effects of irradiation from cosmic rays over hundreds of millions of years. Astronomers used the Spitzer Space Telescope for over 30 hours of observations of ‘Oumuamua in the infrared — or rather, Meech says, they tried. ‘Oumuamua is the first macroscopic object of clear interstellar origin to be seen within Earth’s solar system. Astronomers at Yale and Caltech say that ‘Oumuamua, the much-discussed interstellar space rock, is best viewed as a comet with odd properties — and not an alien probe, as has been suggested. Using telescopes on the ground and the powerful Hubble Space Telescope to … ASTEROID OUMUAMUA shocked scientists when it was first sighted in 2017, with some speculating the … Researchers tracked the interstellar space rock known as ‘Oumuamua on its way out of this solar system. “So it was just an upper limit.” But sometimes even non-detections can provide information. A few large ground-based telescopes continued to track the fading object as it receded from our planet. “They detected nothing,” she says, when looking in the thermal infrared, which detects heat.
The Hubble and Spitzer space telescope are observing the rock this week, and may be able to track it until December.

Scientists have uncovered the truth about a mysterious space rock called Oumuamua that has been hurtling through Earth’s solar system and was spotted last year. Asteroid Oumuamua: Is the mysterious space rock an alien spaceship?


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