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Originally posted by prevenge
Originally posted by stereologist
reply to post by Xagathorn
The name wasn't changed Nemesis is not Tyche. Tyche is not Nemesis. They are separate objects with very different properties based on completely separate lines of thought.
...also...
To distinguish this object from the malevolent "Nemesis," astronomers chose the name of Nemesis's benevolent sister in Greek mythology, "Tyche."
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Originally posted by bekod
I like this statement along with the question:
Q: Why is the hypothesized object dubbed "Tyche," and why choose a Greek name when the names of other planets derive from Roman mythology?
A: In the 1980s, a different companion to the sun was hypothesized. That object, named for the Greek goddess "Nemesis," was proposed to explain periodic mass extinctions on the Earth. Nemesis would have followed a highly elliptical orbit, perturbing comets in the Oort Cloud roughly every 26 million years and sending a shower of comets toward the inner solar system. Some of these comets would have slammed into Earth, causing catastrophic results to life. Recent scientific analysis no longer supports the idea that extinctions on Earth happen at regular, repeating intervals. Thus, the Nemesis hypothesis is no longer needed. However, it is still possible that the sun could have a distant, unseen companion in a more circular orbit with a period of a few million years -- one that would not cause devastating effects to terrestrial life. To distinguish this object from the malevolent "Nemesis," astronomers chose the name of Nemesis's benevolent sister in Greek mythology, "Tyche."
". Nature 308 (5961): 713715 Davis, M.; Hut, P., Muller, R.A. (1984). "Extinction of species by periodic comet showers". Nature 308 (5961): 715717] This hypothesis proposes that the sun may have an as yet undetected companion star in a highly elliptical orbit that periodically disturbs comets in the Oort cloud, causing a large increase in the number of comets visiting the inner solar system with a consequential increase in impact events on Earth. This became known as the Nemesis (or, more colorfully, Death Star) hypothesis.
WISE is a NASA-funded Explorer mission that will provide a vast storehouse of knowledge about the solar system, the Milky Way, and the Universe. Among the objects WISE will study are asteroids, the coolest and dimmest stars, and the most luminous galaxies.
Originally posted by Phage
reply to post by GoldenFleece
WISE was not launched to look for Nemesis or any other object in particular. It's mission was to do a full sky survey.
Getting WISE About Nemesis - Companion of Our Sun?
Is our Sun part of a binary star system? An unseen companion star, nicknamed “Nemesis,” may be sending comets towards Earth. If Nemesis exists, NASA’s new WISE telescope should be able to spot it.
NASA’s newest telescope, the Wide-field Infrared Survey Explorer (WISE), may be able to answer the question about Nemesis once and for all.
Originally posted by Phage
Tyche, as hypothesized, is not massive enough to be a brown dwarf.
We assume that there is a certainty that the sun has an as-yet-to-be-discovered maximum mass companion with mass between MPluto ←→ 20M J , the upper limit being fixed by IRAS/2mass observations.
Zuckerman and Song (2008) give a mass distribution for brown dwarfs down to 13 MJ of dN/dM∝ M−1.2.
Supportive Evidence for a Brown Dwarf Solar Companion
John J. Matese
University of Louisiana at Lafayette, Lafayette LA USA 70504-4210
Abstract. We have previously given evidence based on Oort cloud comet orbital elements which suggested that there may be a Jovian-mass brown dwarf in our solar system. An extended cometary database is now available.
Good one! Except it wasn't the 1980s when Nemesis was "hypothesized." It was LAST YEAR when WISE was launched!
So WISE began it's mission looking for a brown dwarf companion to the sun that causes an extinction level event every 26 million years.
Phew! I'm sure glad they changed the name of that brown dwarf companion to the sun while WISE was orbiting. That gives us an extra 20 million years!
Wouldn't a full sky survey be necessary to discover the "hypothetical" Nemesis?
Has anyone told Matese and Whitmire that?
Zuckerman and Song (2008) give a mass distribution for brown dwarfs down to 13 MJ
My premise from the beginning was that the "hypothetical" Tyche is nothing more than a renamed Nemesis, which is nothing more than a renamed Planet X, which is nothing more than a renamed "Mystery Heavenly Body Found." In 1983. An object the size of Jupiter in our solar system, 55 billion miles from Earth. I've never heard of a "hypothetical" object with so many names and orbits. If I had a nickel every time Phage said "hypothesized" or "hypothetical"...
And what a coincidence, they're all brown dwarfs.
When Stereologist made the ludicrous claim that the Mystery Heavenly Body was actually a "new type of galaxy" (later claiming 6 galaxies), I asked him a simple question: what galaxies were discovered? What are their names? It took an entire page of BS before it became clear that he had no answer.
Phage and Stereologist have repeatedly insisted that Tyche is not Nemesis
I posted calculations from Matese and Whitmire's paper and a Matese abstract that specifically mentions brown dwarfs and contradicts what I believe is a purposeful attempt to deceive.
I pointed out the fact that one of the primary stated missions of WISE was to confirm the existence of Nemesis
In nearly three decades since IRAS was sent up, the question people should be asking is, after launching three infrared telescopes (IRAS, Spitzer and WISE), not to mention building the enormous South Pole Telescope (all of which can image objects many light years away), why is this massive "hypothetical" object in our solar system still impossible to confirm? And what's all the fuss over a brown dwarf?
Originally posted by stereologist
Do you think that believers in Nibiru are dumb and can't see through these ludicrous lies of yours? I think that Nibiru believers are smart.
Originally posted by stereologist
reply to post by GoldenFleece
The issue now is to sit back and see if Tyche can be detected in the WISE data.
that came form well
A new name has been bestowed on the "dwarf planet" whose discovery in 2005 rocked the solar system, sparked debate over "What is a planet?" and ultimately led to Pluto's removal from the planetary family. The dwarf planet, formerly known as 2003 UB313, is now called Eris, after the Greek goddess of discord and strife.
and if went right here is the pic www.nasa.gov... so if they have that pic, why not others? and do you not think... planet... MR Johnston,er Tyche would be released or would they?
A massive star flung away from its former companion is plowing through space dust. The result is a brilliant bow shock, seen here as a yellow arc in a new image from NASA's Wide-field Infrared Survey Explorer, or WISE.
The star, named Zeta Ophiuchi, is huge, with a mass of about 20 times that of our sun. In this image, in which infrared light has been translated into visible colors we see with our eyes, the star appears as the blue dot inside the bow shock.
Zeta Ophiuchi once orbited around an even heftier star. But when that star exploded in a supernova, Zeta Ophiuchi shot away like a bullet. It's traveling at a whopping 54,000 miles per hour (or 24 kilometers per second), and heading toward the upper left area of the picture.
As the star tears through space, its powerful winds push gas and dust out of its way and into what is called a bow shock. The material in the bow shock is so compressed that it glows with infrared light that WISE can see. The effect is similar to what happens when a boat speeds through water, pushing a wave in front of it.
This bow shock is completely hidden in visible light. Infrared images like this one from WISE are therefore important for shedding new light on the region.