Star cluster is a large groupings of stars. The correct option is D.
Stars are celestial bodies made primarily of hydrogen and helium that generate both heat and light from the nuclear hearths inside their cores. This apart from the sun, the light dots that we usually detect in the sky are all generally light-years away.
Stars are the most well-renowned astronomical objects, as well as they are the basic elements of galaxies.
The age, distribution, and composition of stars in a galaxy tells regarding the galaxy's history, dynamics, and evolution.
Star clusters are gatherings of hundreds to millions of stars that would aids the astronomers with crucial information regarding stellar evolution by comparing the ages and compositions of stars.
"Molecular clouds, which are large interstellar regions of gas and dust, form star clusters," Aaron M.
Thus, the correct option is D.
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