Finding: "Objects with chemical composition that's unknown on Earth".
Conclusion: "Likely originated from outside our solar system".
Simpler explanations:
"Formed on Earth through previously unknown process".
"Formed elsewhere inside our solar system".
How many extraterrestrial (but inside solar system) substances do we really know? How much extraterrestrial substances have been sampled, from how many locations on how many objects, exactly? And even on Earth, do we know all processes through which materials are formed?
Yes, extrasolar origin is one possibility. The most likely one? Hmm..
The extrasolar origin hypothesis is based on the reentry velocity, which is known and would have completely vaporized any other known type of meteor. That's what made this one special, the fact that an object with such velocity could survive reentry and impact the surface, and that's why the expedition to find remains (the spherules) was launched.
Finding: "Objects with chemical composition that's unknown on Earth".
Conclusion: "Likely originated from outside our solar system".
Simpler explanations:
"Formed on Earth through previously unknown process".
"Formed elsewhere inside our solar system".
How many extraterrestrial (but inside solar system) substances do we really know? How much extraterrestrial substances have been sampled, from how many locations on how many objects, exactly? And even on Earth, do we know all processes through which materials are formed?
Yes, extrasolar origin is one possibility. The most likely one? Hmm..