Hi Kelly:
Thanks for posting this.
I have not read the original article, but I assume that when they present
measurements from asteroids, this is really measurements from meteorites
which came from asteroids.
Larry
hi, Michael...
I am curious how such a definitive conclusion can be reached
hi, Larry...
I have not read the original article, but I assume that when they present
measurements from asteroids, this is really measurements from meteorites
which came from asteroids.
yes. the figure in question cites about a half dozen sources; the asteroid data
appear to come from
hi, Michael...
I am curious how such a definitive conclusion can be reached from the
analysis of a singular cometary body?
several others have chimed in, but let me try to add something new: it's not
just this one object, really. to date we have D:H ratios for about a dozen
comets, including
Hello Listers
Enjoy :)
From The New York Times (excerpted):
One of the first scientific findings to emerge from close-up study of a
comet has all but settled a question that planetary scientists have
debated for decades.
The new finding, from the European Space Agency’s mission to the
little
I am curious how such a definitive conclusion can be reached from the
analysis of a singular cometary body? How many comets are out there
floating around the solar system? I guess they are assuming all
comets have the same make-up? Seems a bit short sighted to me,
considering, for example, how
The answer to your questions is that it isn't definitive at all. That's
just the spin that journalists are putting on the story. We now have a
small number of data points with regard to the amount of deuterium in
comets and asteroids. Based on these data we can only say that we will
need many
There is nothing definitive about it. The paper describes many factors
that could change the D/H ratio in different samples, and is much more
cautious in its conclusions than the typical press reports suggest:
From the ROSINA measurements on comet 67P/Churyumov-Gerasimenko, we
conclude that
water didn't come from
comets, scientists now say
There is nothing definitive about it. The paper describes many factors
that could change the D/H ratio in different samples, and is much more
cautious in its conclusions than the typical press reports suggest:
From the ROSINA measurements
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