The first know object visited our solar system from interstellar space is Oumuamua, it was discovered by in October 2019, by University of Hawaii’s Pan-STARRS1 telescope which finds and tracks asteroids and comets in Earth’s neighborhood. In the beginning it is believed as a comet, but later observation reveled there is no sign of cometary activity. The Oumuamua is known for its cigar shaped body with reddish hue, it is about 400 metres long, which is greater than any of asteroid or comet yet we know.
With the help of image from FORS instrument in ESO telescope, researchers found that it bright and spin about its own axis every 7.3 hrs. No known asteroid or comet from our solar system varies so widely in brightness, with such a large ratio between length and width. The most elongated objects we have seen to date are no more than three times longer than they are wide.
A few large ground-based telescopes continued to track the fading object as it receded from our planet. Two of NASA’s space telescopes (Hubble and Spitzer) tracked the object traveling about 85,700 miles per hour (38.3 kilometers per second) relative to the Sun. Its outbound path is about 20 degrees above the plane of planets that orbit the Sun. The object passed Mars’s orbit around Nov. 1 and will pass Jupiter’s orbit in May of 2018. It will travel beyond Saturn’s orbit in January 2019; as it leaves our solar system, ‘Oumuamua will head for the constellation Pegasus.
The study on this weird Oumuamua shows that this might made of solid Hydrogen Hydrogen is the most abundant element in the universe, but it's rarely observed in a solid form.
How it formed ?
Hydrogen is the most abundant element in entire universe. In order to form solid Hydrogen it requires extreme cold temperature. such a low temperature is present in the cores of molecular clouds Molecular clouds form the basis of stars and the researchers believe 'Oumuamua could contain hydrogen ice after it passed by one of these molecular clouds in deep space, which could explain its speed.
As the Oumuamus passes close to the sun, its surface begins to boil off and hydrogen vapourize into space and eventually it got its elongated shape like now, like as a bar of soap becomes a thin sliver after many uses in the shower.”
From where it came?
An orbital calculation shows it might from the direction of the bright star Vega, in the northern constellation of Lyra. Astronomers estimate that an interstellar object similar to ‘Oumuamua passes through the inner solar system about once per year, but they are faint and hard to spot and have been missed until now. It is only recently that survey telescopes, such as Pan-STARRS1, are powerful enough to have a chance to discover them.
With the help of image from FORS instrument in ESO telescope, researchers found that it bright and spin about its own axis every 7.3 hrs. No known asteroid or comet from our solar system varies so widely in brightness, with such a large ratio between length and width. The most elongated objects we have seen to date are no more than three times longer than they are wide.
A few large ground-based telescopes continued to track the fading object as it receded from our planet. Two of NASA’s space telescopes (Hubble and Spitzer) tracked the object traveling about 85,700 miles per hour (38.3 kilometers per second) relative to the Sun. Its outbound path is about 20 degrees above the plane of planets that orbit the Sun. The object passed Mars’s orbit around Nov. 1 and will pass Jupiter’s orbit in May of 2018. It will travel beyond Saturn’s orbit in January 2019; as it leaves our solar system, ‘Oumuamua will head for the constellation Pegasus.
The study on this weird Oumuamua shows that this might made of solid Hydrogen Hydrogen is the most abundant element in the universe, but it's rarely observed in a solid form.
How it formed ?
Hydrogen is the most abundant element in entire universe. In order to form solid Hydrogen it requires extreme cold temperature. such a low temperature is present in the cores of molecular clouds Molecular clouds form the basis of stars and the researchers believe 'Oumuamua could contain hydrogen ice after it passed by one of these molecular clouds in deep space, which could explain its speed.
As the Oumuamus passes close to the sun, its surface begins to boil off and hydrogen vapourize into space and eventually it got its elongated shape like now, like as a bar of soap becomes a thin sliver after many uses in the shower.”
From where it came?
An orbital calculation shows it might from the direction of the bright star Vega, in the northern constellation of Lyra. Astronomers estimate that an interstellar object similar to ‘Oumuamua passes through the inner solar system about once per year, but they are faint and hard to spot and have been missed until now. It is only recently that survey telescopes, such as Pan-STARRS1, are powerful enough to have a chance to discover them.
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