The space agency NASA is serious, does not hide any "secret", just like any other institution, does not disclose all the data obtained, only those who are important or of general interest.
And all those who is online and is said to be "top secret"NASA is false information regularly about aliens, UFOs and asteroids that took the life on Earth, and so on., things that do not exist or not 100% certain, these "secrets" are published by charlatans and people who prey on the ignorance of people.