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The blue regions in the spiral arms are composed of the younger population I stars, while the yellow stars in the central bulge are the older population II stars. In reality, many population I stars are also found mixed in with the older population II stars.
Jun 4, 2018 · Observations of 13CO and C18O emission from four dusty starburst galaxies at redshifts of approximately two to three reveal that massive stars are more numerous in starburst events than in ...
- Zhi-Yu Zhang, Zhi-Yu Zhang, D. Romano, R. J. Ivison, R. J. Ivison, Padelis P. Papadopoulos, Padelis ...
- 2018
There are two main groups of stars: Population II Stars - old, metal poor stars. Population I stars - new, metal rich stars. In addition, there are two main endings of a stars life: Normal stars - like our Sun - end their life as a Planetary Nebula and White Dwarf.
A simple chart for classifying the main star types using Harvard classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
A star is born. Scientists call a star that is fusing hydrogen to helium in its core a main sequence star. Main sequence stars make up around 90% of the universe’s stellar population. They range in luminosity, color, and size – from a tenth to 200 times the Sun’s mass – and live for millions to billions of years.
In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. [156] [157] With a mass only 80 times that of Jupiter (M J), 2MASS J0523-1403 is the smallest known star undergoing nuclear fusion in its core. [158]
People also ask
What is the difference between population I and Population II stars?
Where are population II stars found?
Why were the first stars born as Population III stars?
Where are population II stars found in the Milky Way?
Apr 11, 2022 · The stars in globular clusters, found almost entirely in the Galaxy’s halo, are also classified as population II. Today, we know much more about stellar evolution than astronomers did in the 1940s, and we can determine the ages of stars. Population I includes stars with a wide range of ages.
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