Goofs

When Midge Campbell is at the window in her towel speaking to Augie, she rests her chin on her hand. When the shot changes to behind her, her arms are both down, but when the shot returns to the front, her chin is again in her hand.

When Augie Steenbeck is talking to Midge Campbell while eating a sandwich, the bite marks on the sandwich change between shots.

In the first act of the film, Augie calls his kids' grandfather to pick them up. His son Woodrow is by the phone booth door, which is closed. In the next shot, Woodrow is on the opposite side of the booth, and the door is now open.

There is one far shot where you see 5 cars and a bus park in front of the diner. The bus parked parallel with the diner and all 5 cars parked facing the diner. When they change shot to a close up of the bus, in the background is only two cars and they're parked side by side and parallel with the diner. No more than 2 cars total. They then pan down the diner and get introduced to more characters and more cars that weren't there in the previous shot.

Andromeda, played by Ella Faris, has a very prominent spot or mole on her chin at the start and end of the film, which is not present in any other scenes.

At 0:29, on the science fair, Argon and Chlorine are replaced on the periodic table.

The newspaper shows a photo of the alien with a shadow, as if taken with a flashbulb, but Augie did not use a flash.

The peace symbol was not created until February 1958, so it could not have been depicted at the 1955 Junior Stargazer Convention.

Yellow barricade tape was developed in the mid-1960s, about a decade after the movie's 1955 time frame.

In the final version of the memory game, one of the names was Jackie O. That nickname for Jackie Onassis wasn't created until the mid-70s (at least 15 years after the movie date of 1955.

The Bell UH-1 helicopter depicted did not have its first flight until 1956 and did not enter service until 1959, and did not exist in time to appear at the 1955 Junior Stargazer Convention.

The soundtrack includes "Island of Dreams" by The Springfields playing on a radio in the background. This song wasn't recorded until 1962, seven years after the events in this film purportedly took place.

At 14:19, when Midge Campbell is telling her daughter Dinah how unexpectedly hot the desert is, Dinah is reflected in her sunglasses. In the reflection, behind Dinah, a film crew member is also visible.

Every time Augie takes a photograph, he adjusts the lens while looking through the viewfinder. This action is only useful with a TTL (through-the-lens) viewfinder, which is not the case of the camera he is using.