Universe Sandbox
General Category => Astronomy & Science => Topic started by: Naru523 on June 30, 2009, 10:03:51 PM
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Nemesis is a hypothetical red dwarf or brown dwarf star, orbiting the Sun at a distance of about 50,000 to 100,000 AU, somewhat beyond the Oort cloud. This star was originally postulated to exist as part of a hypothesis to explain a perceived cycle of mass extinctions in the geological record.
In 1984 paleontologists David Raup and Jack Sepkoski published a paper claiming that they had identified a statistical periodicity in extinction rates over the last 250 million years using various forms of time series analysis. They focused on the extinction intensity of fossil families of marine vertebrates, invertebrates, and protozoans, identifying 12 extinction events over the time period in question. The average time interval between extinction events was determined as 26 million years. At the time, two of the identified extinction events (Cretaceous-Tertiary and Late Eocene) could be shown to coincide with large impact events. Although Raup and Sepkoski could not identify the cause of their supposed periodicity, they suggested that there might be a non-terrestrial connection. The challenge to propose a mechanism was quickly addressed by several teams of astronomers.
If Nemesis exists, it may be detected by the planned Pan-STARRS or LSST astronomical surveys, or similar future projects. If Nemesis is a brown dwarf, as proposed by Dr. Dan Whitmire and Albert A. Jackson IV, then the upcoming WISE mission (scheduled for November 2009) should easily find it.
More info at: http://en.wikipedia.org/wiki/Nemesis_(star) (http://en.wikipedia.org/wiki/Nemesis_(star))
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But. if Gliese 710 will come 1.1 light years in 1.4 million years. then it would be possible to be a star system or not.
http://en.wikipedia.org/wiki/Gliese_710
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But. if Gliese 710 will come 1.1 light years in 1.4 million years. then it would be possible to be a star system or not.
http://en.wikipedia.org/wiki/Gliese_710
Gl710 is going to fast, but that's a time of comet bombardment.
And Naru, Nemesis would have been found even if it was a BROWN DWARF, if nibiru is orbiting, then it would be at neptune or something, shooting comets at us. We found a brown dwarf about 20ly away, 30 AU, that's easy!
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Yes I know. I was watching a video in youtube that they can't find it. It may exist or not.
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But. if Gliese 710 will come 1.1 light years in 1.4 million years. then it would be possible to be a star system or not.
http://en.wikipedia.org/wiki/Gliese_710
Gl710 is going to fast, but that's a time of comet bombardment.
And Naru, Nemesis would have been found even if it was a BROWN DWARF, if nibiru is orbiting, then it would be at neptune or something, shooting comets at us. We found a brown dwarf about 20ly away, 30 AU, that's easy!
we would see nibiru/memesis in the sky if its 99x the size of jupiter!
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Lol.
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Anyone want to make this Sun-Nemesis System?
I believe if we have a star who is close enough to orbit with the sun we would know by now.
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We manage to see stars of that dimension hundred of lightyears away...
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Stars may come to the solar system in some hundred thousand years. or in million years
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ok, but now it isn't a binary solar system as this star should be only 30 AU away
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Anyone want to make this Sun-Nemesis System?
I believe if we have a star who is close enough to orbit with the sun we would know by now.
I did. Niburu is 6000 AU away from Nemesis. REMEMBER: This is fiction. Lol.
P.S. The sun is yellow and Nemesis is red.
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ok, but now it isn't a binary solar system as this star should be only 30 AU away
Thanks FGFG.
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Anyone want to make this Sun-Nemesis System?
I believe if we have a star who is close enough to orbit with the sun we would know by now.
I did. Niburu is 6000 AU away from Nemesis. REMEMBER: This is fiction. Lol.
P.S. The sun is yellow and Nemesis is red.
if nibiru is 6000 AU away, and its here in 2012 and in 3000 years ago to. its speed is 0.5 light, that can't
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No SuperNova, it's orbiting NEMESIS, Not the sun.
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if nibiru is 6000 AU away, and its here in 2012 and in 3000 years ago to. its speed is 0.5 light, that can't
It would be 0.5 c only if the distance was 1500 LY not AU.
An AU is about 150'000'000km
A LY is about 9'460'800'000'000km