I have to say.... they're very unnoticeable.
Honestly.
90% of the time I just completely miss the tiny notifications that pop up in bottom left corner.
Sometimes I happen to see a coronal ejaculation. And then economy changes.
Then I invaded an opposing planet with my heavy force intended to smash that tec starbase with over 20k hp.
And to my surprise there was some kind of event there that disabled ship's abilities.
It didn't screw me over at all... its just that I was forced to retreat every single one of my capitals once they went below 50% in hp. But the titan and other ships plus ogrovs stayed there and splattered the starbase eventually.
To be honest. I thought I was going to get my balls kicked in by the events but they feel so tame to the point where I ignore them and carry on like usual. ( I already ignore them in my current game in progression.) And there seeems to be nothing cool to find. I'm playing on Huge Multi random planets. 142 planets. Hoohah!
I did however manage to find something reasonably cool.
I managed to find a ship graveyard in one of isolated uncolonized star system in current game.
I raced my ass there and found out how funny it is. 0 population settlement?
Soo.... there's no people working and taking ships apart there for res? Just all robots?
And then.... I'm not sure but, is this a blackhole?

I'm wagering this is a black hole. Because you see, that scout.. I placed there early in a different map yesterday.. and it vanished after when I came by to look at it like after 15 mins. It got sucked in by the blackhole I think.
To be honest I thought it was a graphic display glitch but after scout disappeared, I"m now wondering if it is a blackhole or not.
And then.. I had a good laugh at the expense of exploring!
My first time getting trolled by such results of discovery 
Can you see what's so wrong with the picture? Can you?

Dwarf Planet... okay.
Metal asteroids.. okay.
Expert Crystal Miners.. okay.
Uhh, wait, if I remember correctly, there's no crystal to mine so how did this planet become experts at crystal mining? 
And then.. for the fortress world discovery you say,
that it only spawns in faraway neutral worlds?
Well.. I did manage to find one.
I was playing as Tec Loyalist, and nitheim rebels went in as tec loyalist.. After I wiped them out in revenge because they was trying their hardest to wipe me out. It was early game, so after awhile I was settling and exploring the new worlds that was formerly nitheim.
Fortress world, Volcanic planet. OH. Holy that would've been utter trouble if I let nitheim rebels live long enough
Three star bases and with even more bell and whistles!? One of the routes to attack my homeworld is now absurdly secure. And it's still building up defenses. I think this is the most i ever had fortified a world.
And major problem with Stellar Phenomona as I explore the universe.. I truthfully have no idea what they're supposed to do. Some detailed info would be great and helpful.
Because you see that blackhole map had like eight antimatter wellspring areas around my capital.
I actually ragequited because I have no idea what they do and started a new game. I'm like a leader of this impossibly advanced civilization and I cannot get even information of such discovery
I have scientists but they're not telling me what it's doing but they insist on researching a Javelin prototype! I want to know what this antimatter zone does for me! D=
So I had no choice but to restart a new game, there was simply too many of them and I have no idea what they do and I needed planets so it was easy to restart because it's at the moment is nothing but shiny blue sparkly fairies on black backdrop.