When I look at Moon, I am looking at many many generations of my ancestors. And they are looking back at me. We are communicating. We are one. We have been one. Always. No we are not alone in this Universe.
When I look at Sun, I am looking at Suryavanshi (one belonging to the Solar dynasty) lord Ram. I am looking at many of my ancestors. I am touching their feet with my eyes and they are gazing at me, washing away all my impurities and worries. Nothing else matters in that moment. And there is only that moment. No we are not alone in this Universe.