How do scientists know how long galaxies are? 1.05K viewsJanuary 3, 2024 Question90.82K July 29, 2019 0 Comments How do scientists know how long galaxies are? In: Mathematics 2 Answers ActiveNewestOldest Anonymous Posted July 29, 2019 0 Comments We can measure the distance to a galaxy via redshift, and use some trigonometry and angle measurements to predict their size. We can also use their brightness to estimate their size. Lastly, we can use the speed of their spin to predict their size. You are viewing 1 out of 2 answers, click here to view all answers. Register or Login
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