Note that you'll also want to be familiar with sizing your pics (nobody likes a scroll bar) - to do that, just right click on it and set the width etc. Also you can use %'s.
For example:
Yours = <p><img height="527" src="https://lh5.googleusercontent.com/-DDbDOkUwah4/UoBMH6t5S8I/AAAAAAAANB0/abIKhKYEXLs/w2048-h1778/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg" width="609" /></p>
Mine = <p><img src="https://lh5.googleusercontent.com/-DDbDOkUwah4/UoBMH6t5S8I/AAAAAAAANB0/abIKhKYEXLs/w2048-h1778/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg" width="55%" /></p>
