Description:
Space and planetary science and related technical work. (Moderated)
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So bring me that asteroid..
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It occurs to me with this mission to move an asteroid and bring it into a different orbit closer to the moon/earth system,that there are possible dangers with this plan. Its got to be reasonably low in mass one supposes as it would not be very easy to move it, on the other hand all this talking... more »
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Dark Matter Paradox / Black Hole Runaway
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OK, I'll pose a problem. Time for an Original Post from me ;-)
If, as conjectured, dark matter pervades the Universe, (making up as much as 24% of the mass in the universe) why hasn't/isn't any of this been swallowed into the ultimate gravitational attractor. Why are there so few black holes around and why are they so small if we are awash in... more »
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Dark Energy Dark matter
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Now if this stuff actually exists in such abundance how does it not muck up all the calculations of trajectories of the many spacecraft sent out into the suburbs of our solar system. One would have thought that if it was there, it would in effect change the laws of gravity to some extent even... more »
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Determining orbit trajectories
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Am most interested in the methods JPL uses to calculate orbits of NEOs and how frequently
the data used to calculate the orbits is updated for close approach objects.
Specifically:
1. Are JPL's algorithms proprietary or published?
2. If published - where can they be accessed?
3. What is the type and source of the data used in orbit determination?... more »
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OT: Re: Is Space Really Empty
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...Well not really. Space-time at the margins can be quite odd.
For example, at the edge of the event horizon of a black hole, "a virtual particle" can instantaneously pop into existence when its "virtual twin" falls into the hole.
At the distances or intervals shorter than the Plank distance/interval,... more »
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breaking the law of physics\maybe?
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If the universe is 13.7 billion years old and has been expanding from a
single point of originfollowing the big bang, and the hubble deep feild
is viewing galaxies 13 billion light years away, essentially your
looking 13 billion light years away 13 billion years into the pastnow if
I am correct, and scientist calculations are somewhat accurate about the... more »
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Moon quakes
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Are these purely due to the tide of the earth on the moon, as I heard suggested on tv a few nights ago, and if they are, are they keeping the moon internally warm?
Brian
-- ...The email is valid as bria...@blueyonder.co.uk
Blind user.
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Six posts in a year?
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...
Interesting. Your post somehow got through w/o moderation (though I suspect most people aren't seeing it).
And there are far more than 6 posts so far this year.
I count over 6 in June alone.
And a fair number in January with a few over the other months.
Sounds like your news server is fubarred.... more »
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