河漢 is read as かかん (kakan) and means Milky Way.
かかん
kakan
かわ
discarded tiles
かこう
mouth of river
かがん
riverbank
かわら
dry riverbed
かっぱ
cucumber
かせん
rivers
かほくこうぎょうだいがく
Hebei University of Technology
かほくだいがく
Hebei University
かわらにんじん
Artemisia apiacea (species of artemisia)
かなんだいがく
Henan University
かせんこうじ
riparian works
かせんこうがく
river engineering