"What are the multiple and huge mysterious things/objects in Earth orbit"?

Recently, I have been made aware by a trusted associate that there are many-many huge and clearly mysterious "things" in Earth orbit.  Since our government and associated Space agencies are either silent or claiming ignorance on these matters, often suggesting that those who make the claims are incorrect, stating that no such "things" exist, we must speculate ourselves.  I have seen incredible images and these things are huge and appear to be very sophisticated and enigmatic.  Some have suggested that these are Alien probes studying Earth and others suggest they belong to multiple Alien entities with any number of agendas, including possible reasons that range from invasion strategies to simple intelligence probes.  Others suggest that "everything" up there belongs to "US" and these are TOP SECRET "things" put in place to either DEFEND Earth from potential Alien threats to ultra secret American space probes used for TOP SECRET space research that involves OUR alleged trips to the Moon and Mars for things like colonization to study.  These sources claim that WE are very active in Space exploration and "the powers that be" work hard to keep the American public ignorant about these matters.  Clearly, something incredible is UP THERE and strange things are "going on" Try to view some of the incredible and amazing images on multiple Internet venues!  What do you think?