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A New Heaven and Earth
"We have all heard the buzz about the Mayan prophecies for the year 2012, the Apocalypse of Revelation and perhaps fewer about the Purification Day of the Hopi prophecies. All religions have prophesies of great changes for humanity, but few know what to do about it. Learn about the future of our planet Earth, and how to prepare yourself today."
Originally posted by GoldenFleece
There sure are a lot of posts and calculations based on the assumption that this object is orbiting our sun.
Since the majority of stars are binary or even trinary, these are premature and risky assumptions and IMO, you guys sound way too definitive.
In classical mechanics, the two-body problem is to determine the motion of two point particles that interact only with each other. Common examples include a satellite orbiting a planet, a planet orbiting a star, two stars orbiting each other (a binary star), and a classical electron orbiting an atomic nucleus (although to solve this system correctly a quantum mechanical approach must be used).
Two-body problem
The n-body problem is the problem of predicting the motion of a group of celestial objects that interact with each other gravitationally. Solving this problem has been motivated by the need to understand the motion of the sun, planets and the visible stars. Its first complete mathematical formulation appeared in Isaac Newton's Principia (the n-body problem in general relativity is considerably more difficult).[citation needed] Since gravity was responsible for the motion of planets and stars, Newton had to express gravitational interactions in terms of differential equations. Newton proved in the Principia that a spherically-symmetric body can be modeled as a point mass.
n-body problem
Originally posted by GoldenFleece
If anyone wants to place blind trust in a profession and government agency that doesn't even agree on the definition of a planet and can't find a massive object 4X the size of Jupiter in our own solar system, that's up to you, but I won't be joining you.
Originally posted by Drunkenparrot
If some of you truly interested in the subject spent a fraction of the time learning some of the science (and the physics supporting that science) rather than taking fantastical guesses based on internet rumors your returns would be many fold. You could not only help others understand the workings of the cosmos, you would also have the tools to more easily discern fact from fiction and could reach your own conclusions independent of the rhetoric and hyperbole that always surrounds these type of claims.
Originally posted by plutoice
reply to post by Tamahu
are u willing to appear to these beliefs or are they just perportioned ideas of myanism. Theres many undiscovered planets amongst our solice system but the solar plex has been overly denied year after year. The officials in order must protect the information about the earth similars fetched far of pluto. This being the reason for dishonesty in prospect of the last 2012 theory playing into the destruction of our home space sphere. Its a rock with a core but the oceans reach is the same overlay at the end of the destination. Yes this could be Nibaru, but the humans have detected they will call it something other especially with the broadcast of NASA.
Originally posted by Drunkenparrot
reply to post by Drunkenparrot
Elemental composition has nothing to do with it, mass is everything. Gravity doesn't care if it is a Jupiter mass worth of hydrogen or solid iron, it will be the same.
Final Catastrophe
"The Kabbalistic analysis demonstrates that in the numbers two (2), five (5), zero (0), and zero (0), the secret of the great catastrophe is enclosed. Whosoever has understanding, let him understand for there is wisdom therein.
"Unfortunately, people do not know how to comprehend the profound meaning of certain Kabbalistic numbers. Lamentably, they interpret everything literally." - Samael Aun Weor
Hercolubus (the correct spelling)
Hercolobus (an incorrect spelling, but brings up different images)
Originally posted by Draken
Originally posted by Drunkenparrot
reply to post by Drunkenparrot
Elemental composition has nothing to do with it, mass is everything. Gravity doesn't care if it is a Jupiter mass worth of hydrogen or solid iron, it will be the same.
Now sure how you come up with that. To know the mass of any object in space, you need to know the composition of the object.
Planetary mass is a measure of the mass of a planet. Within the Solar System, planets are usually measured in the astronomical system of units, where the unit of mass is the solar mass, the mass of the Sun. In the study of extrasolar planets, the unit of measure is typically the mass of Jupiter for large gas giant planets, and the mass of Earth for smaller rocky terrestrial planets.
The mass of a planet within the Solar System is an adjusted parameter in the preparation of ephemerides. There are two basic procedures for measurement:
If the planet has natural satellites, its mass can be calculated from Kepler's third law. The same procedure can be used for data from space probes such as the Voyager probes to the outer planets and the MESSENGER spacecraft to Mercury.
The mass of a planet can also be inferred from its effect on the orbits of other planets.
In practice, both methods are used. The ephemeris is a model of the Solar System, and the planetary masses within that model are adjusted so as to give the best fit between the model and the observed positions of the planets
Planetary mass
The only way we can measure a planet's mass is through its gravity. This has been the way Earth's mass was measured, too (we can't directly probe what's in Earth's interior, but we can measure the gravity on the surface). Since nobody ever visited other planets and was able to measure gravity on the spot, we usually have to resort to other methods. The most commonly used technique is to observe a body orbiting or passing close to the planet and see how its path is affected by the planet's gravity.
How do you measure a planet's mass?
Weighing planets is a tricky business. We can't even see the vast majority of extrasolar planets! For most of them, all we can do is watch how their gravity makes their star wobble. But astronomers can decipher that information and use it to estimate the orbit. The problem is, we can't tell whether the orbit of the planet is face-on or edge on in the sky, so there is always some uncertainty.
Every once in a while, though, we get lucky and discover a planet that passes in front of its star, so it blocks a little of the light. This is called a "transit", and tells us a lot more about the planet. For one, we know its orbit exactly, since we know that we are seeing it exactly edge on (otherwise we wouldn't see the planet go in front of the star). If we know the orbit exactly, then we can figure out what the planet's mass is compared to the star. We can get a good estimate of the star's mass based on its brightness and color, which lets us figure out the planet's mass too.
How do we know the density of some extrasolar planets?
Originally posted by CLPrime
reply to post by Drunkenparrot
I will add to that a basic observation... that to calculate the mass based on density, you need to have the volume...
Originally posted by AtruthGuy
reply to post by this_is_who_we_are
Yay that was cute, you learned how to use google image search!
Obama got everyone using the net now.
...sigh net is slowly going down hilledit on 15-2-2011 by AtruthGuy because: (no reason given)edit on 15-2-2011 by AtruthGuy because: (no reason given)