Skip to comments.Supernova Dust Fell to Earth in Antarctic Meteorites
Posted on 04/28/2013 10:19:12 AM PDT by SunkenCiv
In the new study (pdf), Pierre Haenecour of Washington University in St. Louis and his colleagues analyzed two meteorites collected in Antarctica in 2003, each named for a geographic feature near the spot where the meteorite fell. (Antarctica makes an ideal hunting ground for dark-colored meteorites, which stand out clearly against the ice fields.) Grove Mountains 021710, found by a Chinese expedition, and LaPaz Icefield 031117, collected by U.S. searchers, each harbor presolar grains of silica (SiO2), the researchers found, as evidenced by the grains enrichment in a heavy isotope of oxygen known as oxygen 18. That signature points to the grains formation in a type II supernova -- the explosion initiated by the collapse of a massive stars core. Other researchers had spotted presolar silica in meteorites before, but those grains had different isotopic signatures that indicated that they came from an aging star called an asymptotic giant branch (AGB) star rather than from a supernova.
The conclusion by Haenecour and his colleagues that a supernova seeded our corner of space with silica grains, among other types of dust, lends laboratory support to a 2008 study, using the Spitzer Space Telescope, that spotted the possible spectral signature of silica in the remnant of a supernova that exploded in the Milky Way so recently that its light reached Earth just 300 or so years ago.
(Excerpt) Read more at blogs.scientificamerican.com ...
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
It's like beatnik poetry. Did Allen Ginsburg write this headline?
Yes, RR Lyrae-cal...
Evidence is piling up in support of Darwin’s theory of evolution. The entire universe is evolving.
Darwin was an idiot and you have to jump to too many unknown concepts and bridge too much data to fully support in the entire history of mankind, one guy got it right.
Anyone know who that person is today? Not one.
There is a huge difference between evolution and adaption which he never addresses.
Darwin, saw a snap-shot in his life and extrapolated data he never proved or, disproved - we call that global warming in this generation.
The phrase "Ignorance is bliss" is from the poem Ode on A Distant Prospect of Eton College by the English poet Thomas Gray. The poem was published in 1742. The full context of the quote reads as follows:
"Thought would destroy their paradise. No more. Where ignorance is bliss, 'tis folly to be wise".
|GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach|
Just adding to the catalog, not sending a general distribution. ;')
Crystal Blue Persuasion...
And who was that exactly, you?
At least i am not an ideologue like you and free to think as you can. It appears you gave up that knowledge a long time ago and simply drank the cool-aid.
And before you call some one a moron for simply disagreeing with you, Darwin noted “things change” but never proved where the stuff came from to change.
Half and idea is still half and idea.
By the way, I have never called anyone a moron simply for disagreeing with me. There are plenty of morons out there who agree with most of my thinking and there are plenty of very smart people who don't. And vice versa.
If I were to call someone a moron, it would be because they said something really dumb in public.
...Darwin noted things change but never proved where the stuff came from to change.
So what? You seem to be saying that unless an idea is perfectly complete, fully developed in all its implications and consequences, as well as fully supported in ways not even discovered yet, the idea is somehow debased. That's dumb.
Half an idea is still half an idea.
Yes - and half an idea is still better than no cogent idea at all.