Win the liquid author rewards for this post.
#15 was won by 
with "acorn" as the correct guess.
This was the hint:
#19 has not been won so perhaps a roll over there.
This is macro Photography so its something small that is enlarged in the photo.
First correct answer wins all the liquid author rewards for this post... after its paid out.
I'm looking for two words, 8 and 5 letters:
this is _ _ _ _ _ _ _ _space _ _ _ _ _
If nobody gets it the pot will roll over to the next one (#21)
One shot per account is the general rule, but since these are getting a bit more difficult lets try 2 guesses (as separate comments per account).
Perhaps don't use both straight away but it's up to you.
You don't need to vote or anything (although it may increase the pot)
I will put up the result a couple of hours after we have a correct entry.