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What evidence is there to suggest that the sun was formed from material produced when an earlier star exploded?
This was on Yahoo answers (http://answers.yahoo.com/question/index?qid=20071228163233AAI0621) and explains quite well why our sun is second generation at least:
The only elements that would have been formed from the big bang are hydrogen, helium, and perhaps trace amounts of lithium. Elements up to iron can be produced in a star by nuclear fusion. (Heavier elements require more energy to start the fusion than is released in the fusion reaction--i.e. energy is LOST. Therefore, only elements up to iron are formed by nuclear fusion.) In a star like our sun, there is not enough mass to create the pressure and heat needed for even the fusion into iron. Our sun will produce metals only up to carbon and oxygen.
Any metals heaver than iron could only be produced in a supernova. (Just a note, astronomers and astrophysics use the term "metal" to mean any element heaver than hydrogen or helium).
The fact that our sun contains trace amounts of iron and heavier metals means it must have been there when it formed, since these cannot be formed by the nuclear fusion within our sun. Since first generation stars would only contain hydrogen, helium, and trace amounts of lithium from the big bang, our sun is not a first generation.
This makes sense since our sun is only around 5 billion years old and the universe is about 16 billion (opinion varies from 11 to 20 billion, but 16 is right in there and generally accepted). That leaves at least 10 billion year for things to have happen before our sun formed: That is a lot of years for other stars to have formed and died, recycling some of its mass back into the universe and our sun. Since the life cycle of very large stars could be as little as 100 million years to supernova stage, the sun could conceivably be many generations along.
Anyway you look at it, it is definitely AT LEAST second generation.
What else can I help you with?
Where did the Challenger space shuttle explode?
Challenger exploded over the Atlantic Ocean off the coat of Florida, not far downrange from the Kennedy Space Center where it had launched only 73 seconds earlier
What unexpected event happens during the launch of Apollo 13?
During the launch of Apollo 13, an oxygen tank exploded, causing significant damage to the spacecraft. This led to the mission being aborted and the crew having to use the lunar module as a lifeboat to return safely to Earth.
Why do you not see evidence of heavy meteoroid bombardment on the moon?
The lack of a significant atmosphere on the moon means that meteoroids don't burn up the way they do in Earth's atmosphere, resulting in fewer visible impact craters being created. Additionally, the moon's surface is constantly being resurfaced by volcanic activity and micrometeorite impacts, which erases evidence of earlier impacts over time.
Who invented first globe?
The first globe is believed to have been invented by the ancient Greeks, specifically by the philosopher Crates of Mallus in the 2nd century BC. However, there is evidence to suggest that earlier civilizations, such as the Babylonians and Egyptians, also created spherical representations of the Earth.
Where is it 9 hours earlier then Dallas int he northern hemisphere?
In the northern hemisphere, it is 9 hours earlier than Dallas in Moscow, Russia.
Did the addition of molecular evidence support or refute the hypothesis that you made earlier based on structural evidence only?
The addition of molecular evidence supported the hypothesis made earlier based on structural evidence. Molecular evidence provides additional data that can confirm or strengthen hypotheses that are based on structural evidence.
Where can you find exploded view of Swiss K-31 rifle?
The link below will take you to an exploded view of a Swiss Schmidt-Rubin 1911 rifle- earlier bersion of the K-31, and similar. You can also try egunparts.
What is material from an earlier movement in a symphony called?
Cyclical Form.
when must scientific theories be change?
when enough evidence contradicts earlier ideas
What item did Samuel colt began producing in 1835 in Paterson NJ?
The first revolver (The Paterson Revolver) produced in the U.S. An earlier crude revolver had been made in another country earlier but never mass produced. Too impractical.
Fossil evidence supports the origins of life on Earth earlier than years ago.?
3.5
Why might a writer return to an earlier writing stage?
To do more research for additional material.
Why use Viagra instead of levitra or cialis?
Because Viagra is it produced earlier then Levitra or Cialis
How was mankind created evolution or biblical?
All the evidence indicates modern man evolved from earlier apes.
What are negative impacts of the spinning jenny?
The earlier version of the spinning jenny produced much weaker thread then when it was hand produced so the quality decreased
Why are plankton mostly found in January and February?
Most organisms are produced or born in the earlier months of the year.
Why might a writer sometimes go back to an earlier writing stage?
To do more research for additional material.
