Psalm 8 "3 When I consider your heavens, the work of your fingers, the moon and the stars, which you have set in place,
4 what are mere mortals that you are mindful of them, human beings that you care for them?"
You can read, listen, and watch videos and images, and explanations of the mind-boggling nature of these collisions at the Hubble's own web site.
With on average 500,000 Million stars in our Galaxy alone, and an estimated 100 Billion galaxies in the universe, that's 70 sextillion or 7 × 1022, stars in the universe (70 thousand million million million).
'When Galaxies Collide' would make such a cool book title.