The lipstick Rachel gives Milo to write with on the napkin is nowhere near the same color she has on her lips.
One character says of a star system, "It's the only system to have planets." At this point, astronomers are pretty sure than most stars have planets. Also, the character says it is a constellation and then refers to it as a star system.
During an overhead shot of the Stormgren farm, the large tree shown is not indigenous to Missouri.
At one point, a character refers to a star system as a constellation.