하늘에서 별 따기
sky-ABL star pick-GER
[…like] picking stars from the sky
Which is to say, trying to do something impossible. Pretty self-explanatory. I've not been very consistent in how I mark (terminologically speaking) word endings – I use so many different reference sources, and there's certainly no consensus among those sources. I sometimes think of the -에서 ending as an ablative or simply "lative" case for nouns. And there is definitely something gerund-like in the -기 ending for verbs. Hence my choices for today, above.
The sky is overcast. It might rain later.