Video Showing Half a Million Asteroid Discoveries 154
An anonymous reader writes "Since 1980 over a half million asteroids have been discovered, mostly between the orbits of Mars and Jupiter, now thanks to this video you can see this activity condensed into a few minutes. At full resolution it's a mesmerizing experience as new discoveries are added and the video makes it possible to see patterns in the discovery positions, for example a large number appear in line between Earth and Jupiter as astronomers started looking for smaller jovian moons after Voyagers visit to the system."
Planets? (Score:2, Insightful)
Re:Needs a caption (Score:2, Insightful)
It does appear that the white pixels represent observations of objects for which a solid orbit has not been calculated. The colored pixels appear to be objects for which an orbit is known. You will note that during the last few seconds of the video that the density of "known" objects is high, and that few(er) new objects were being displayed.
Re:Planets? (Score:3, Insightful)
The Earth, yes. Mars, no, not really, as you point out. You could consider Mars the largest asteroid.
Cool. And Scary. (Score:3, Insightful)
I'm going to focus, instead, on just how cool it was because, really, it was damn cool.
Re:Planets? (Score:3, Insightful)
It's not about vacuuming the neighborhood (by that measure even Jupiter doesn't count), but whether or not the nearby debris is dominated by the gravitation of the body in question.
Re:Cpt Obvious Observation (Score:5, Insightful)
Yeah, we call that "nighttime" around here.
Re:Needs a caption (Score:3, Insightful)
I'm interested in the dynamic influence of all of the asteroids on spacecraft navigation and the celestial mechanics of the solar system. There are lots of asteroids that influence the orbit of Mars at the meter level, and lesser but still substantial numbers that significantly perturb the Earth and the other planets. Even the large Kuiper belt objects like MakeMake have a significant effect.
Re:Planets? (Score:4, Insightful)
It looks like neither planet really meet the guideline of "clearing its neighborhood"...
Sure they have. It doesn't mean there can't be any other object in their orbit. Think of it in terms of ratios. Earth plus its moon, and Mars are both several orders of magnitude more massive than the sum of every other object in their orbits. Non-planets like Pluto or Ceres are several orders of magnitude less massive than the rest of the mass in their orbits.
Re:Cool. And Scary. (Score:1, Insightful)
"I must admit, however, I also find it kinda scary."
If it helps, at the real scale of the real solar system, those dots should probably be the size of an atom in your computer display.
Re:Cpt Obvious Observation (Score:3, Insightful)
Re:Needs a caption (Score:3, Insightful)
The major planets are light blue, not green. I certainly don't want you as a reviewer.