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The emission spectrum of each element has characteristic lines for each element. Analyzing the spectrum of a star, you can figure out what elements are present, and also get an estimate on how much there is of each element. For more information, check the Wikipedia article on "emission spectrum".
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How are planets detected around other stars?
By changes in the stars' brightness, and slight variations in their predicted location.
What is the factories of elements?
If the question is where are elements made, the answer is in stars.
What elements have been detected in a class B star?
helium and hydrogen
Why is hydrogen and helium found in all stars?
These elements are found in are very important in each of the five stars. all five stars because the elements
What do astronomers think about the possibility of planets orbiting other stars and being detected?
Hundreds of extra-Solar planets have been detected already.
Dark matter can be detected by its?
Dark matter can be detected by its gravitational effect on nearby stars, causing them to very slightly alter their relative motions.
Can gas giants orbit closely to the stars they orbit?
Yes. We have detected gas giants orbiting very close to their stars.
Why are stars referred to as atomic furnaces?
It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.It is in the stars that the heavier elements (basically, anything after element #2, helium) are made.
What did these first generation stars make?
First stars made the smallest elements, from hydrogen up and progressively larger stars made progressively larger elements
What two elements are the most common stars?
The two most common elements in the Universe, and in most stars are - in that order - hydrogen and helium (elements #1 and #2).
What elements are formed in cool stars?
Elements that are formed in cool stars are heavy but not heavier than iron. (Elements that are heavier than iron are formed in a supernova.)
Do stars form new elements?
Yes - in fact, most of the elements ONLY exist because they were formed in stars.
