Metallic orb sent by aliens?

I am intrigued by what might be up in the night sky and spend much time looking up to see what I can see. I have not seen an actual space craft as such but I have seen an intense light appear high up in the night sky, get extremely bright and then disappear. I sometimes see tiny little lights drifting around in the back paddock, but the strangest thing I have seen on two seperate occasions a couple of months ago is a small ball floating around. It appeared to be metal and slightly bigger than a baseball, it had 3 flashing lights set in a row on the front of it. It wasn't very high up, the second time it drifted overhead ( I was in the backyard as I always am when sky watching,) the ball drifted over me toward the front yard. It went over the roof of the house and hovered in the front yard for a few minutes. Then a second metal object drifted over me, this one was a similar shape and size to a Nintendo game controller, it also had three? Flashing lights on the front of it. It headed toward the floating ball and they drifted off somewhere, I couldn't see where and havnt seen either since. Neither made a noise nor moved very quickly. They weren't very bright either, if I wasn't looking up I would never have noticed them. Has anybody seen something like this or could you let me know what I have seen?