1. HEMISPHERE : Tonight, as in time and times without memory, the heavens arch over us and we experience the night sky as a hemisphere of twinkling lights.
2. HEMIHYDRATE : Using a telescope fashioned with a hemihydrate liquid or crystalline rock for the lens, the ancients fixed their contemplations upon the stars.
3. HEMIPLEGIA : But nowadays, who harbors such wonder except an exceptional few, such as the famous Australian amateur astronomer who, though blind in one eye due to hemiplegia and a stroke, has discovered a dozen odd stars for NASA.
4. HEMICYCLE : He can attest to the fact that standing on earth in his yard every night, he sees the heavens rotate in a hemicycle just as it seemed to the ancients to do so.

The earth may be spherical but our world is flat.