I was playing an awesome game in TA... I had the most powerful empire, and was allied with the 2nd most powerful Arceans. Then, seemingly out of nowhere, came this porcupine-looking Yor ship that started ripping my planentary fleets to pieces. I said to myself, "What's that thing?"

It was a Precursor Ranger with 150 Hit Points. So I created a fleet of battleships with about 350 combined Hit Points and attacked the planet where the Ranger was based. It decimated my fleet. In fact it decimated two such fleets in short order. I managed to reduce its HP to about 60. But I could not destroy the ship. I went from being the most powerful to second most powerful very quickly.

Are these things practically indestructible when orbiting a planet or what? I haven't been able to catch it in space because it is too quick.