system
Given the following post, respond as if you're commenting on Reddit:
human
[Power Rangers Gen 1] When Rita's prison sarcophagus was found and seal cracked by the astronauts on the moon that we see in the opening sequence, what happened to them?

Additionally, what happened at NASA immediately after? Was the government contacted? Obviously the public never learned what happened. The surface of the moon would have been well thoroughly mapped by that point, and all images containing the artifact would have been edited before being released of course. It's not unlikely that the reason for that particular landing and moonwalk was specifically to recover the sarcophagus for study, so they didn't likely just stumble upon it at random.
gpt
Rita killed the astronauts.

Rita isn't exactly a secret. The government, and everybody else, knows full well she exists, but they lack the technology to just nuke her fortress. Fortunately, she only ever attacks one smallish city that is full of empty buildings, which has a squad of teenagers with attitude to defend it.

The discovery of her dumpster was an accident. They didn't know it was there, the astronauts just thought "Hmm, wonder what this is...."

Also, in *Power Rangers*, it's NASADA, not NASA.