:first:
Asteroid and Meteoroid Not a Coincidence
- Thread starter Jefferson
- Start date
:first:
"Shooting fish in a barrel" is more like it. A bunch of ignoramuses preaching to their equally-ignorant perfectly-duped choir make for slow moving targets.
Shasta
Well-known member
Heat is a form of kinetic energy
Spoiler
| Asteroid Itokawa (e-toe-KA-wah). The fountains expelled dirt, rocks, and considerable water from Earth. About half of that water quickly evaporated into the vacuum of space, freezing the remainder. Each evaporated gas molecule became an orbiting body in the solar system. Later asteroids formed. Many are shaped like peanuts. Gas molecules captured by asteroids or released by icy asteroids became their temporary atmospheres. Asteroids with thick atmospheres sometimes captured smaller asteroids as moons. If an atmosphere remained long enough, those moons would lose altitude and gently merge gravitationally with their asteroids, forming peanut-shaped asteroids. If an atmosphere dissipates before merging, a moon remains. We see merging (called aero-braking) when a satellite or spacecraft re-enters Earth’s atmosphere, slowly loses altitude, and falls to (merges with) Earth. Without an atmosphere, merging in space becomes almost impossible. Japan’s Hayabusa spacecraft traveled alongside asteroid Itokawa for two months in 2005. Scientists studying Itokawa concluded that it consists of two smaller asteroids that merged. Donald Yeomans, a mission scientist and member of NASA’s Jet Propulsion Laboratory, admitted, “It’s a major mystery how two objects each the size of skyscrapers could collide without blowing each other to smithereens. This is especially puzzling in a region of the solar system where gravitational forces would normally involve collision speeds of 2 km/sec [4,500 miles per hour]. The mystery is solved when one understands the gentle role that water (and the gases produced) played in the origin of comets and asteroids. Notice that a myriad of rounded boulders, some 150 feet in diameter, litter Itokawa’s surface. High velocity water produces rounded boulders; an exploded planet or impacts on asteroids would produce angular rocks. The Hayabusa spacecraft landed on asteroid Itokawa, scooped up 1534 tiny rocks (up to 0.18 millimeters in diameter) and returned them to Earth in 2010. The wide range of minerals in those rocks were typical of Earth’s most common minerals, but their chemical elements were quite different from the solar system’s most common chemical elements. Analyses of Itokawa’s minerals show that at some time in the distant past, they reached temperatures of up to 1472°F, which would have been typical of the rocks in the subterranean chambers. Average temperatures on the asteroid itself are about 1,900°F colder! |
-source.
Lordkalvan
New member
^ Perhaps the Professor can elaborate the point he wishes to make by posting this extended C&P?
gcthomas
New member
I think he was trying to avoid mentioning the unusually high O18/O16 and O17/O16 isotope ratios, which are entirely inconsistent with an Earthly origin of the asteroid.
Unless the hydroplane theory has an ad hoc explanation for differentiation by isotope?
We can talk about any issue you like. My link was in line with what were were talking about. Feel free to comment upon it.
Lordkalvan
New member
Comment on what, Professor? The argument you have omitted to make which your C&P was intended to illustrate?
And we're talking about something else at the moment.
Feel free to comment upon what we are discussing at present. :up:
gcthomas
New member
So I shouldn't comment on the material you cut'n'pasted? Huh?! You should stop smoking whatever is doing this to you.
Lordkalvan
New member
So what are we 'discussing at present' and how was your C&P intended to advance it? Given that this C&P includes references to the chemical composition of the asteroid and its alleged similarity to Earth, GCT's observation seems entirely pertinent. If you find this obvious discrepancy embarrassing for Wally's hypothesis, perhaps you shouldn't have posted something that led to it being introduced into the discussion?
Lordkalvan
New member
Clearly you can only comment on things that the Professor allows you to. It's a professor's prerogative, after all.
gcthomas
New member
Why do you think he feels the need to defend every anti-science crackpot theory at comes up in Enyart's show? Is Enyart's show like the inerrant declarations of dogma the Pope makes?
In other news ...
You are in France (French?): will you be watching the England-France rugby match is afternoon?
Lordkalvan
New member
I guess if the cognitive dissonance gets too great, you're forced into defending anything that seems to reduce the dissonance. So when he says 'We can talk about any issue you like' what he actually means is anything except what he doesn't want you to.
Yes, I'm in France, but not French and yes, I'll be watching the game.
Not supporting Les Bleus, malheureusement.
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You can comment on whatever you like. But we were having a specific discussion. Feel free to join it. :up:
What are we talking about?
How does the thermal energy from the eruption of the fountains of the deep get turned into kinetic energy?
The French play rugby? It's said that it's a game for ruffians, played by gentlemen.
Which should disqualify the French on both counts.
Which should disqualify the French on both counts.
Moons around asteroids.