<p>If the semi major and semi minor axis of a galaxy are 3" and 1" respectively, how would you find the radius of the galaxy?</p>

CC BY-SA 4.0
2018-08-27T07:19:16.937Z
What do you mean by "radius ... given its inclination"? The semi-major and semi-minor axes are the radii of an ellipse.
Mick
CC BY-SA 4.0
2018-08-27T18:24:41.703Z
When you update, please be sure to clarify units.  ' 3" ' could be inches , or seconds of arc, among others.
Carl Witthoft
<astrophysics>
How to the find radius of a galaxy given its inclination?
Shaz Miller
# How to the find radius of a galaxy given its inclination?

(Asked by: username_0 on 2018-08-27)

If the semi major and semi minor axis of a galaxy are 3" and 1" respectively, how would you find the radius of the galaxy?

**Tags:** astrophysics
> **Comments:**
> **username_1**: What do you mean by "radius ... given its inclination"? The semi-major and semi-minor axes are the radii of an ellipse.  
> **username_2**: When you update, please be sure to clarify units.  ' 3" ' could be inches , or seconds of arc, among others.  

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