Posted on 05/28/2018 5:16:16 AM PDT by SunkenCiv
...nearest stellar neighbor, the Alpha Centauri system, is located about four light years away. While that's not very distant in cosmic terms, it's wide enough for our solar system to not be influenced by these alien stars. But in about 1.3 million years, a star named Gliese 710, which is about 60 percent as massive as the Sun, is projected to interrupt the Sun's hermitude by crashing right on through the far-flung reaches of the solar system. While astronomers have been aware of this stellar meetup for years, new observations from the European Space Agency's Gaia satellite, released on Thursday, have constrained the trajectory of Gliese 710's impending visit, and charted out nearly 100 other upcoming close encounters with wandering stars. According to the Gaia team, Gliese 710 will swoop through the Oort cloud, a vast shell of icy debris at the outer limits of the solar system, at a distance of roughly 90 light days, or 1.4 trillion miles. To put that into perspective, the star will be about 16,000 times farther from the Sun than Earth. That may sound like a good stretch of space, but it is well within the boundaries of the Sun's domain. During the encounter, Gliese 710 will shine nearly three times brighter in Earth's skies than Mars. It could also spitball comets and ice worlds from the distant reaches of the solar system toward Earth, increasing the likelihood of deadly impacts... it's worth noting that it is far from the only star Gaia has identified as a potential trouble-maker... scientists have plotted out the trajectories of 300,000 stars over the next five million years, and discovered that 97 of them will breach a radius of 93 trillion miles around the Sun.
(Excerpt) Read more at thescinewsreporter.com ...
Gliese 710 - 2 on YouTube
Star Blasted Through Solar System 70,000 Years Ago
discovery.com | Ian O’Neill
Posted on 02/18/2015 1:11:46 PM PST by BenLurkin
http://www.freerepublic.com/focus/chat/3258944/posts
A star disturbed the comets of the solar system 70,000 years ago
sciencedaily.com | March 20, 2018 | FECYT - Spanish Foundation for Science and Technology
Posted on 03/20/2018 8:40:10 PM PDT by BenLurkin
http://www.freerepublic.com/focus/chat/3641285/posts
I’ll just wait on it, thanks anyway. But, I thing “global warming” will get us first.../s
Nemesis
And they thought global warming was bad.
Can I have your stuff? ;-)
Interesting-thanks.
Cher and who else?
Looking forward to it.
In 1.3 Million Years . . . only God knows what He is going to do with the solar system. The main thing is that in those 1.3 million years one finds him or herself spending an eternity in heaven. The alternative can be avoided by one’s believing in the Lord Jesus Christ thus escaping the millions of years in the fiery pits of hell. . . damned forever.
I guess I should update my will.
I can imagine Ort Cloud debris gravitationally disturbed 70,000 years ago could still be on a slow trajectory inbound to give us an A: light show B: massive destruction
Can't come soon enough.
Advice. If you’ re writing a scientific article, you don’t use the word “spitball” as a verb or as a noun. The word is undefined in a scientific context.
The requisite scare words are there: “increasing the likelihood of deadly impacts”. Now we have something else to worry about.
We’re all gonna die!
Interesting. I like the spitball analogy. Reminds me of 10th grade science class where we are told to read the chapter on comets and bic pen barrels are brought out and an impromptu demonstration is given by hooligans in the back row to the nerds in the front. Teacher, of course, out having a cigarette break.
Two stars? So Star Wars is really about the future?
“Predicted minimum distance is expected some 1.281 million years from now, possibly approaching as close as 0.0676 parsecs, 0.221 light years”—quote from wikipedia piece below
For the record, one light-year, the *distance* light travels in a year, at its ~steady rate of 186,000 miles per second, works out to about 5.9 Trillion miles. And so .221 light years is approximately 1.3 trillion miles. That’s 1,300 x 1 billion (miles).
“Gliese 710 or HIP 89825 is a orange star in the constellation Serpens Cauda whose main popular interest is its future significant close encounter with the Sun.
Predicted minimum distance is expected some 1.281 million years from now, possibly approaching as close as 0.0676 parsecs, 0.221 light years or about 13,300 AU[10]: being about 20 times closer than the current distance of Proxima Centauri.
It will then reach a similar brightness to the brightest planets, perhaps reaching an apparent visual magnitude of about -2.7 (brighter than Mars at opposition).
Maximum total proper motion will peak around one arc minute per year,[11][12] whose apparent motion will be readily noticeable over a human lifespan.
Gliese 710 currently is 63.8 light-years (19.6 parsecs) from Earth in the constellation Serpens and has a below naked-eye visual magnitude of 9.69.
Stellar classification of K7 Vk,[4] which means it is a small main sequence star mostly generating energy through the thermonuclear fusion of hydrogen at its core. (The suffix ‘k’ indicates that the spectrum shows absorption lines from interstellar matter.)
Stellar mass is about 60%[7] of the Sun’s mass with an estimated 67% of the Sun’s radius.[8]
It is suspected to be a variable star that may vary in magnitude from 9.65–9.69. As of 2017, no planets have been detected orbiting this star.
https://en.m.wikipedia.org/wiki/Gliese_710
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