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Supernova sediments still rain down on Earth and the Moon

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  Supernova sediments still rain down on Earth and the Moon Sam Wormley <swormley1@gmail.com> - 2016-04-21 15:40 -0500
    Re: Supernova sediments still rain down on Earth and the Moon "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-04-21 13:58 -0700
    Re: Supernova sediments still rain down on Earth and the Moon jimp@specsol.spam.sux.com - 2016-04-21 20:55 +0000
    Re: Supernova sediments still rain down on Earth and the Moon ClutterFreak <clutterfreakincarnate@gmail.com> - 2016-04-21 16:28 -0700

#572197 — Supernova sediments still rain down on Earth and the Moon

Supernova sediments still rain down on Earth and the Moon
> http://physicsworld.com/cws/article/news/2016/apr/21/supernova-sediments-still-rain-down-on-earth-and-the-moon


> A radioisotope of iron produced by exploding stars has been
> discovered both on the Moon and in cosmic rays that are entering the
> solar system, bolstering the theory that at least two supernovae
> exploded within our galactic neighbourhood some two million years
> ago. The research has revealed that deposits from these massive
> cosmic blasts still rain down on Earth today. While previous research
> has found samples of the isotope that have accumulated on Earth and
> the Moon in the distant past, this is the first measurement of the
> present-day rate.
>
> Previous research has unearthed deposits of iron-60 (60Fe) in
> deep-sea crusts and sediments at the bottom of the Earth's oceans.
> These results suggested that two supernovae exploded 1.5 and 2.3
> million years ago, at distances of 290 and 325 light-years from the
> Sun (see "Finding the earth-bound evidence for supernovae in the
> galactic neighbourhood").


-- 

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#572208

On Thursday, April 21, 2016 at 1:40:34 PM UTC-7, Sam Wormley wrote:
> Supernova sediments still rain down on Earth and the Moon
> > http://physicsworld.com/cws/article/news/2016/apr/21/supernova-sediments-still-rain-down-on-earth-and-the-moon
> 
> 
> > A radioisotope of iron produced by exploding stars has been
> > discovered both on the Moon and in cosmic rays that are entering the
> > solar system, bolstering the theory that at least two supernovae
> > exploded within our galactic neighbourhood some two million years
> > ago. The research has revealed that deposits from these massive
> > cosmic blasts still rain down on Earth today. While previous research
> > has found samples of the isotope that have accumulated on Earth and
> > the Moon in the distant past, this is the first measurement of the
> > present-day rate.
> >
> > Previous research has unearthed deposits of iron-60 (60Fe) in
> > deep-sea crusts and sediments at the bottom of the Earth's oceans.
> > These results suggested that two supernovae exploded 1.5 and 2.3
> > million years ago, at distances of 290 and 325 light-years from the
> > Sun (see "Finding the earth-bound evidence for supernovae in the
> > galactic neighbourhood").
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

Sam Raining down is much to Macro.Think about it. Trebert

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#572211

Sam Wormley <swormley1@gmail.com> wrote:
> Supernova sediments still rain down on Earth and the Moon

Oh the horrors!!


-- 
Jim Pennino

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#572240

On Thursday, April 21, 2016 at 3:40:34 PM UTC-5, Sam Wormley wrote:
> Supernova sediments still rain down on Earth and the Moon
> > http://physicsworld.com/cws/article/news/2016/apr/21/supernova-sediments-still-rain-down-on-earth-and-the-moon
> 
> 
> > A radioisotope of iron produced by exploding stars has been
> > discovered both on the Moon and in cosmic rays that are entering the
> > solar system, bolstering the theory that at least two supernovae
> > exploded within our galactic neighbourhood some two million years
> > ago. The research has revealed that deposits from these massive
> > cosmic blasts still rain down on Earth today. While previous research
> > has found samples of the isotope that have accumulated on Earth and
> > the Moon in the distant past, this is the first measurement of the
> > present-day rate.
> >
> > Previous research has unearthed deposits of iron-60 (60Fe) in
> > deep-sea crusts and sediments at the bottom of the Earth's oceans.
> > These results suggested that two supernovae exploded 1.5 and 2.3
> > million years ago, at distances of 290 and 325 light-years from the
> > Sun (see "Finding the earth-bound evidence for supernovae in the
> > galactic neighbourhood").
> 

Can they measure the birthdate of ordinary iron? Or some other substance around us. How about the zinc Hanson shoves up his nostrils to fight flu (and encourages us to do so)? Would be nice to know which supernova made them. 

-ps Was it him or was it Ed Green?... No it was him. 

--
    "Lead your life with a gentle hand and be
     ready to depart whenever you are called."
                        
                        - Leo Szilard

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