Alva Review-Courier -

ALBUQUERQUE, N.M. (AP) — The mysterious closure of a solar observatory in New Mexico earlier this month happened after the FBI opened a child pornography investigation involving a janitor's computer found at the observatory, and agents tracked wireless signals used to access child porn, according to an FBI search warrant affidavit.

The mountaintop Sunspot Solar Observatory closed from Sept. 6 to Sept. 17, but the research association that manages it has said only that an unspecified security issue was the reason for the closure.

The facility employs a small group of scientists, researchers and...