Using this thoroughly explained, detailed photoshop lesson, you will see how to create blue space explosion effect using some special photoshop tips and tricks. Let's start!
Step 1
I will start with a new document with a black background, and with the following size 350 x 350 pixels.
Step 2
Choose now FIlter > Render > Clouds.
Step 3
Duplicate now Your layer (CTRL + J) and choose Filter > Artistic > Plastic wrapr and make the adjustments as follow:
Step 4
Duplicate Your layer again (CTRL + J) and set the blending mode to Overlay. 
Then, choose Layer > Merge Down.
Step 5
Duplicate the layer again and choose Edit > Transform > Flip horizontal. After that, set the blending mode to Pin Light.
Step 6
Duplicate now Your layer one more time (CTRL + J) and choose Edit > Transform > Flip vertical. After that, set the blending mode again to Pin Light.
Step 7
Choose now Layer > Merge Visible (Shift+Ctrl+E).
Step 8
Duplicate the layer and choose Filter > Artistic > Pain Daubs and make the adjustments as follow:
Step 9
Hit now CTRL+ALT+U and make the adjustments as follow:
Step 10
Put the blending mode on Hard Light and after that hit (Shift+Ctrl+E) - Merge Visible.
Step 11
Duplicate layer again (Ctrl+J) and go to Filter >Blur >Radial blur. After that, make the adjustments as follow:
Step 12
Hit now again CTRL+ALT+U and make the adjustments as follow:
Step 13
Choose now Filter > Sharpen > Smart Sharpen and make the adjustments as follow:
Step 14
Choose now again Filter >Blur >Radial blur and set the same settings.
Step 16
Put the blending mode on Lighten.
You should now have something like below. 
Have a nice day!
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