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By the star's spectrum.
Eino Rolfson
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How do scientists determine the elements in a star since they cannot collect a sample from a star?
They analyze the star's spectrum. Each element produces characteristic lines in a spectrum.
How do astronomers identify elements of the stars?
Elements are identified based on their absorption spectra. Every element absorbs a unique set of frequencies when light passes through it. Scientists can determine which elements are present based on which portions of the star's light are absorbed.
Do scientists uses how far away the star is to determine the brightness of the star?
yes sometimes
How star made of?
Our Sun is about 70% Hydrogen and 28% Helium by mass, with traces of heavier elements. Other stars can be a little different, but with a spectrometer, scientists are able to determine the elements that are present in any star.
One way in which scientists can determine the surface temperature of a star is by its?
There are several things scientists can do to determine the surface temperature of a star. Formulas utilizing Wein's law and the Stefanâ??Boltzmann law can calculate stellar temperatures. However, for a rough estimate, scientists can also use the color of a star in order to determine surface temperature.
One way in which scientists can determine the surface temperature of a star is by its A. brightness. B. composition. C. color. D. mass.?
its color does determine the temperature of star.
What acts as fingerprints to help scientists determine a star's composition?
Spectral lines - nn
How are stars made of?
Our Sun is about 70% Hydrogen and 28% Helium by mass, with traces of heavier elements. Other stars can be a little different, but with a spectrometer, scientists are able to determine the elements that are present in any star.
Are red stars old or new?
The color of a star does not directly determine its age. Red stars are large and a little less hot then the Sun. Scientists can use the color of a star to determine its heat and then using that and its mass determine how old it is.
How do scientists determine the parallax of a star?
they look at the star in, say, spring, then fall or summer then winter. we have to be on opposite sides of the star to see the parallax, so it takes about a year
How do scientists know the composition of stars?
Mostly by spectrographic observation. Every distinct element radiates exact and specific frequencies of light. By taking a tiny sample of the element and heating it to "glowing hot", we can measure the spectrum of the light that this element gives off. This is how a spectrometer works. In a star, the elements are already at thousands of degrees, so all astronomers need to do is to analyze the spectrum; most stars have spectra that are as distinct as fingerprints to people. We can determine what elements are present, and in what proportions, with considerable accuracy.
Can scientists analize the elements of a star?
Scientists can assess which elements are present in the star, by looking at the light it gives off and breaking this light down into the different colours that make up the total colour. They look at the spectrum given off. The different elements present in the star cause different light wavelengths (or colours) to be emitted.
