I feel horribly off balance.
Commercial bananas are produced asexually as a cross between two plants through plant clippings and if the current line dies out, we may lose bananas altogether"
makes me go ‘what the hell you talking about, mister?’
For example, why don’t we see a blue shift from binary stars, since half the time the mass exchange between stars is such that the mass is approaching us? In the case of the Gould belt, how can an expansion take place only in two dimensions? Why don’t we observe the K effect coming from either of the double expansions that would make the Olano model compatible with observations? Why is the redshift of early-type stars in clusters always positive? How can the solar limb be redshifted?
makes me go 'you have some pretty good points but I’m not quite sure that all of the data you’re excluding is extraneous.’
I really am horribly off balance. But man, I am geeking all over astronomy and I love it. Dude, the Gould belt? It’s awesome as hell to think about. It really is an anomaly in space and some say that if we can figure it out, we’ll be able to figure out how other things in our galaxy, or even the universe, were born. For a long time, astronomy thought it was an isolated anomaly but now we’re finding out data to support the theory that this exists in every galaxy, just as we’re now seeing that all galaxies have a supermassive black hole in the middle (and we’ve found a couple of galaxies that have two!).
The observable data doesn’t help us figure it out yet. We don’t even know what it is. It could be a giant ring of gas holding stars, or it could just be a ring of stars. It could also be something that was created when dark matter collided with our molecular cloud. Some think that the Gould belt hit a bunch of newborn stars when it was expanding and created stars that grew too fast, lived too fast and created amazing deaths for themselves. Then that there may have been a second event like this.
There’s one problem with that theory though, which is that our own Sun can be found within the Gould belt - either as within the center of the ring, or buried in the ring’s matter. So what, exactly, does that say for us in particular?
Whether it’s moving stars around, aggravating them or merely holding them is a puzzle we’ve never solved. I want to see if anyone’s ever tried comparing the behaviors and mass we interpret it to the same factors for a compact star. A compact star has a large mass and a small radius. What this translates to is that it’s a lot of star in a very small space. If you can imagine a crumb actually weighing about two pounds but not looking any bigger than another crumb, then you’ve got it. So if the Gould belt’s expansion may be limited in dimensions, then we’re taking the same rules and applying it to a different kind of space.
’Non Doppler Redshift of Some Galactic Objects’ (Paul Marmet) has this to say:
Olano and Lindblad et al. have considered a model of a local gas ring related to the Gould belt. Lindblad believes that not only stars, but also the local gas, form an elliptical expanding ring roughly coincident with the Gould belt. He considers that the expanding ring of gas of the Gould belt is decelerated by the dragging action of the surrounding galactic gas. It is assumed that the gaseous galactic disk has a constant thickness and density of gas. The gas of the Gould belt is arbitrarily assumed to have the shape of an expanding “tube” of gas and that the Sun is located “in the vacuum enclosed by the tube." Surprisingly, the height of the tube is considered to remain constant during the expansion (two-dimensional expansion) and is always centered and perpendicular to the galactic plane. It is assumed that this gas motion acts as a "snowplow model” and sweeps the galactic gas in its path.
In this, the Gould belt is a tube with a stagnant space, while what it contains expands dramatically. Doesn’t that sound familiar? As expected, this is only one theory in the middle of many. But no matter what we consider the Gould belt to be, it’s obvious that it has a high amount of power over the existence and shape of our solar system. School teaches us to think of our Sun as having the most power over us, but that Sun is contained by more than interstellar matter. With the Gould belt’s reputation and past, we find that we need to study and identify it not just because it’s interesting, but because of what it might do to us.
And that’s pretty fantastic.