Astronomers now believe that disk galaxies likely formed first, then evolved into elliptical galaxies through galaxy mergers. ... This observation arises because galaxies could not have formed as they have, or rotate as they are seen to, unless they contain far more mass than can be directly observed.
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Explanation:
Astronomers now believe that disk galaxies likely formed first, then evolved into elliptical galaxies through galaxy mergers. ... This observation arises because galaxies could not have formed as they have, or rotate as they are seen to, unless they contain far more mass than can be directly observed.
Answer:
Yaar use jarur khta but mera breakup ho gya
ab kaha to galiya padengi -,-