When I was 12 years old I saw what looked like 3 craft close together in a delta formation flying high up in the sky near my home in the UK. These 3 objects looked like big meteors or something like that. The rear end of them had a faint orangey/reddish glow coming from them. You could say that they could have been fighter jets but there were no more lights on them at all, and the area around the glow was all jagged like the entrance to a small rocky cave. Thats’ the only way I can explain it. It was getting toward the end of twilight one evening.
As to whether there are extraterrestrial/alien craft here on Earth, i’m inclined to think not. The reason being, that the vast distance to the nearest star to our own star – The Sun – is too great for a group of interstellar travellers to make regular trips.
The next closest star to earth after the sun is Proxima Centauri, which is around 4.3 light years away. So using your imagination for a moment, imagine you were floating in space 4.3 light years away from the earth and facing the earth. You then shine an amazingly powerful torch back, towards the earth, so I can see it. From the moment you switched on the torch it would take 4.3 years for me to see the torch light, here on earth. And that light from your torch would be racing towards my eyes at 186,000 miles a second!
The distance from earth to the sun is around 98 million miles, the distance from earth to Proxima Centauri is 270,000 times further away, a mind boggling distance.
Looking at it another way: The Galileo space probe holds the record for the fastest speed ever achieved by an artificial/man-made body, It got to around 106,000 miles per hour. Even at that speed, it would take about 17,900 years to get to Proxima Centauri. And that is just the nearest star to us, of which there are estimated to be roughly 100 billion (100,000,000,000) in our own galaxy!!
I think? the next nearest planet to us (outside our solar system, but within our own galaxy) is 10.5 light years away 0____o
I have another theory though. On the cutting edge of physics, is string theory. String theory says that there are more dimensions in our universe than just the 3 dimensions us humans can perceive. I think there are something like 10 or 11 in total??
Now if there was an advanced civilisation out there, who had found some way of manipulating or travelling through some of these dimensions to arrive here then maybe??? I just wouldn’t know where to start thinking about such things.
I find it unlikely though not improbable…
I think personally, the ufo’s/alien spacecraft that have been reported over the years, may turn out to be man made vehicles. Not something that has originated from outside earths atmosphere. I mean like secret military experimental aircraft. It’s said that the US had brought 250 or so nazi scientists to America after the second world war. Psychologists, weapons specialists, genetics people, Verner Von Braun the rocket man who developed the V1 and V2 rocket motors, and then went on to work on the US space program.
Apparently the Germans had been trying to develop anti-gravity propulsion systems themselves during the war, as opposed to combustion/jet propulsion. Maybe they discovered something they later developed with in the US after the war. Imagine it: the ability to pilot a craft that can take off vertically hover silently, reach staggering altitudes and acheive speeds and aerobatic manouveres that are not possible with conventional aircraft. It would be revolutionary. There would be many reasons to keep such technology in the dark. I really don’t know.
Regarding the existence of life outside our planet in the universe at large, well, I can’t proove it, like much of what I’ve written here. But after seeing hubbles deep field pictures, and realising that there are billions of galaxies out there, each one containing billions of stars with possibly billions of solar systems with maybe millions of habitable earth-like planets in them.
Well I don’t believe for one moment that there isn’t life out there somewhere, whatever shape or form it may take :)