Well good gawd, pal. What are the physical attributes of the universe that completely exclude information for our "primate brains" to recognize and comment upon? If they had no order, i.e. design, or physical attributes science may not even notice them.
Is it scientifically possible to detect intelligence?
If I understand your post correctly, it appears you are making a huge assumption that the only way we notice or recognize phenomena is because the phenomena provides information that can only be the result of an intelligence. Or are you simply defining information as anything we observe?
What information is encoded in the observation of a planets orbital path? If there is any, how do we determine that it is from an intelligence?
"Is it scientifically possible to detect intelligence?
Depending on the definition of intelligence; human like intelligence, yes. Nonhuman intelligence? That is unknown.