Solar system just had an interstellar visitor + Planet challenges formation theory

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"Perhaps @IAU_org should name A/2017 U1 'Rama'. Sir Arthur C. Clarke certainly described it rather well - in 1973." --Naming An Interstellar Visitor


Unidentified Interstellar Object Whizzes Through Our Solar System (Oct 30)
https://www.labroots.com/trending/space/...lar-system

EXCERPT: While astronomers witness asteroids and comets whizzing through our solar system on a consistent basis, it’s not every day that one of those happens to be an interstellar space rock taking a shortcut through our solar system. t would seem that a space rock originating from an alien solar system has trespassed into our planetary neighborhood. Experts are now scrambling to study what’s left of it before it whips out of our view just as fast as if came flying in....


The Solar System Just Had an Interstellar Visitor. Now It’s Gone (Oct 25)
https://astroengine.com/2017/10/25/is-co...r-visitor/

EXCERPT: (Update) At original time of writing, C/2017 U1 was assumed to be a comet. But Followup observations by the Very Large Telescope in Chile on Oct. 25 found no trace of cometary activity. The object’s name has now been officially changed to A/2017 U1 as it is more likely an interstellar asteroid, not a comet...


Scientists Spot First Alien Space Rock In Our Solar System (Oct 26)
http://www.npr.org/sections/thetwo-way/2...lar-system

EXCERPT: Astronomers have spotted some kind of outer space rock that's the first visitor from outside of our solar system that they've ever observed. The discovery has set off a mad scramble to point telescopes at this fast-moving object to try to learn as much as possible before it zips out of sight....



'Monster' planet discovery challenges formation theory
https://www.eurekalert.org/pub_releases/...103117.php

EXCERPT: A giant planet, which should not exist according to planet formation theory, has been discovered around a distant star. The new research is presented in a paper recently accepted for publication in the journal Monthly Notices of the Royal Astronomical Society.

The existence of the 'monster' planet, 'NGTS-1b', challenges theories of planet formation which state that a planet of this size could not be formed around such a small star. According to these theories, small stars can readily form rocky planets but do not gather enough material together to form Jupiter-sized planets....

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