Read the Beforeitsnews.com story here. Advertise at Before It's News here.
Profile image
By Universe Today (Reporter)
Contributor profile | More stories
Story Views
Now:
Last hour:
Last 24 hours:
Total:

Meteorites Found With Little Pieces of Other Stars

% of readers think this story is Fact. Add your two cents.


When Carl Sagan said, “We are all made of star stuff,” he didn’t just mean we were made up of parts of our own star. Other stars contributed to the material that built our solar system, and some of that “presolar” material is still present in a pristine form inside meteorites.  Now, a team led by Dr. Nan Liu at Washington University in St. Louis took a close look at some of the parts of meteorites that formed before the Sun.  They held some exciting surprises and answers.

Scientists have known for a long time that meteorites contain presolar material. One of their most significant issues was separating that presolar material from the rest of the material that has merged as part of the meteorite’s formation. As with so many problems in science, this one was solved by throwing a powerful enough instrument at it.

Image of one of the presolar grains embedded in a meteorite captured by NanoSIMS.
Image of one of the presolar grains embedded in a meteorite captured by NanoSIMS.
Credit – Nan Liu Lab

NanoSIMS is a powerful mass spectrometer.  Dr. Liu and her team used an upgraded version with a more powerful plasma ion source to drive NanoSIMS, resulting in clear pictures of presolar grains they were interested in.  They used the ion beam itself to clear away other contaminants, such as aluminum, which were not formed as part of the presolar brain.

With a clear picture of the true materials in the grain, the team could start collecting valuable data.  One thing they looked for was the isotope ratios of carbon and nitrogen. C and N are two isotopes that can be directly studied in stars themselves.  Confirming their radios in a presolar meteorite will help inform stellar physicist’s models of the growth of carbon stars, a type of giant star that contains more carbon than oxygen.

UT video discussing some details of meteorites.

There had been a sticking point in the stellar physics community about nitrogen ratios found in previous meteorites.  The new study clarifies that those ratios were likely skewed due to contaminants that Dr. Liu’s group removed with the ion beam.

Carbon and nitrogen weren’t the only isotopes the study was interested in thought.  Al-26, a radioactive form of aluminum, also captured their attention.  The ratio seen in the presolar grains was about twice the rate predicted by stellar evolution models.  Additionally, the overall isotope levels suggest that the temperature that formed the grains in a carbon star was likely higher than previously expected.

Sample meteor handled by researchers at Arizona State University.
Sample meteorite handled by researchers at Arizona State University.
Credit – ASU

That’s a lot of discoveries for a small piece of presolar material wrapped up in a meteorite.  But any data about previous stars is valuable, especially from samples that scientists can literally get their hands on. There are also plenty more meteorites out there that might hold other hints at the stellar formation process. 

Learn More:
WashU – Stellar fossils in meteorites point to distant stars
Astrophysical Journal Letters – New Multielement Isotopic Compositions of Presolar SiC Grains: Implications for Their Stellar Origins
Daily Mail – Ancient meteorites have grains of stars that are OLDER than the solar system itself, study shows
UT – Ancient Meteorites Can be Found Embedded in Rocks, Like Fossils

Lead Image:
Graphic showing the presolar material forming out of a star explosion or a carbon star.
Credit – NASA, Nan Liu, Andrew Davis

The post Meteorites Found With Little Pieces of Other Stars appeared first on Universe Today.



Source: https://www.universetoday.com/153054/meteorites-found-with-little-pieces-of-other-stars/


Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!


Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST


Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Report abuse

    Comments

    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    MOST RECENT
    Load more ...

    SignUp

    Login

    Newsletter

    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.