On Friday the Pentagon released what appears to be the first batch of government files related to unidentified flying objects (UFOs), or unidentified anomalous phenomena (UAP), since President Donald Trump directed officials to do so via a social media post earlier this year. The files include FBI reports into unexplained sightings, as well as NASA debriefs with astronauts who saw things on the moon they couldn’t identify—some of which were captured in images.

Scientific American’s Adam Kovac reports that experts in the field are not surprised by any of the released files and say that, rather than quelling speculation, the declassification could fuel it.

Here are some of the images included in the file release, as well as the information about what the photographs might show that the Pentagon has provided.

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