"...which landed in Australia over 50 years."
I thought they arrived more rapidly than that.
In any case, I'd have thought most of the heavy elements (e.g. > Iron) on Earth are older than the Sun, since they must have been created elsewhere.
Boffins think they have found the oldest known substance on Earth, dust grains that were formed around five to seven billion years ago - before the Solar System had even formed. “This is one of the most exciting studies I’ve worked on,” said Philipp Heck, lead author of the paper published in the Proceedings of the National …
The problem is that elements found on Earth, most of which have interstellar origins, have been affected by Earth to the point that dating them is problematic. Thus the search for elements (and isotopes) in meteorites that have mainly been affected by cosmic rays.
Yup. The initial assumption with carbon dating was that the constant cosmic ray flux would lead to a constant level of carbon 14 in the atmosphere. Then it was realised that the constant wasn't and that plus other factors resulted in variations so now we have calibrations from dendro samples.
These granules were formed early on and then have probably been through the gravitational mangle multiple times where they became part of bodies along with younger material. To be broken up, reformed ( probably a number of times), finally only to crash and burn on the surface of our planet. All the material being manufactured by successive generations of stars. There is no glue other than what gravity did to it.
The granules age with respect to our Sun has no significance, The Sun is a mere baby by comparison.
After 14 billion years since the big bang we finally have life evolve. Unfortunately that life is full of fucking idiots intent on killing life and the planet it evolved on.
If I were a Deity watching over this, I'd be shaking my metaphorical head in dispair whilst humming 'Always look on the bright side of life'
I had a quick look at myself and, given one or two that may not be there naturally or at all, I found elements -
There's antimony, arsenic, aluminum, selenium,
And hydrogen and oxygen and nitrogen and rhenium,
And nickel, neodymium, neptunium, germanium,
And iron, americium, ruthenium, uranium,
Europium, zirconium, lutetium, vanadium,
And lanthanum and osmium and astatine and radium,
And gold, protactinium and indium and gallium,
And iodine and thorium and thulium and thallium ...
And (nearly) all were formed from the pre-solar system ... The scientists' rock may be old, but I'm just as old!
I wish I could upvote you more than once for that....
... have a vBeer instead.
(and almost a downvote since I'll have that damn song - although I really like G&S, it is too addictive - running through my mind all night!)
(mind you, it could be worse, it could be the Chicken Song)
You missed so many ...
"There's yttrium, ytterbium, actinium, rubidium,
And boron, gadolinium, niobium, iridium,
And strontium and silicon and silver and samarium,
And bismuth, bromine, lithium, beryllium, and barium.
There's holmium and helium and hafnium and erbium,
And phosphorus and francium and fluorine and terbium,
And manganese and mercury, molybdenum, magnesium,
Dysprosium and scandium and cerium and cesium.
And lead, praseodymium, and platinum, plutonium,
Palladium, promethium, potassium, polonium,
And tantalum, technetium, titanium, tellurium,
And cadmium and calcium and chromium and curium.
There's sulfur, californium, and fermium, berkelium,
And also mendelevium, einsteinium, nobelium,
And argon, krypton, neon, radon, xenon, zinc, and rhodium,
And chlorine, carbon, cobalt, copper, tungsten, tin, and sodium."
Thank you Tom Lehrer (and Gilbert and Sullivan).
Biting the hand that feeds IT © 1998–2020