NASA PAO has provided this statement:
“NASA’s Johnson Space Center does not prohibit the use of any specific religious terms or names in employee newsletters, or other internal communications. The ‘JSC Today’ daily electronic newsletter has cited numerous religious themes and holiday events throughout its history. A May 28, 2015, ‘JSC Today’ posting for the Praise and Worship Club was cited by some employees as proselytizing and an inappropriate use of federal resources. However, the newsletter has continued to make postings that have been religious in nature for both the Praise and Worship Club and other organizations, and on multiple occasions have cited specific references to the name ‘Jesus.’ There is an exceptionally strong sense of community at Johnson and across the agency, which is why NASA is consistently rated among the very best places to work in the federal government. Johnson’s leadership has fostered that spirit of community and mutual respect over the years, and believes it is a crucial contributor in achieving mission success.”
– Excerpts from JSC newsletter (PDF)
