Three experiences spring to mind...
My first sighting of Halley's Comet. Bonfire Night, 1985 - I was standing on a school playing field, with fireworks whizzing and banging behind me and on both sides, the air stinking of the smoke from bonfires, and the sky tinted and tainted orange by the light and glowing sparks rising from the fires. I had been scanning the sky for days, looking for Halley, without any success... then I spotted it, little more than an out of focus star but
there. I'd been waiting to see Halley's Comet for 16 years, and finally I was looking at it...
Seeing Comet Hale Bopp from the centre of Castlerigg Stone Circle at Keswick. Leaning against one of the ancient standing stones I watched Hale Bopp rising up from behind the mountains opposite, its twin tails looking like searchlights beaming into the sky. Just glorious. I shiver now, remembering it.
And finally, the huge aurora I saw in 2001 (I think it was, I'd have to check). It was such a huge auroral storm that it literally filled the entire sky with great flapping cloaks and sails of red, and the auroral arc passed over the UK so the northern lights became the 'southern lights'. I watched the display for around 5 hours, standing in the shadow of Cockermouth Castle, with the waters of the rover glowing bright red as they reflected the aurora raging above. Standing there, feeling like an ant on the deck of a ship, staring up at huge sails of red, all I could do was laugh..
The Universe charges us for witnessing sights like this - eclipses and meteor showers missed, comets shining another part of the sky, etc etc. But now and again she rewards us.
Astronomy. Gotta love it.