In 1 Sam.17:53-56 The Bible plainly identifies David as the slayer of the philistine Goliath.
However in 2 Sam.21:19 it states in a war with the Philistines "....and Elhanan the son of Ja-a-re-ore-gim the Bethle-hemite got to strike down Goliath the Gittite the shaft of whose spear was like the beam of loom workers."
On another note according to Genesis the Sun was a luminary for the day and the moon was a luminary for the night.
Granted the Sun is regular as clockwork for being a luminary for the day but the moon as a luminary for the night ?
Many times in it`s cycle the Moon never appears in the night sky because it is on the other side of the earth in the day time and quite visible.
Just saying.