“Berserkers, named after the human berserker warriors of Norse legend, are doomsday weapons left over from an interstellar war between two races of extraterrestrials.”
https://en.wikipedia.org/wiki/Berserker_(Saberhagen)
Rendezvous with Rama
Plot
The “Rama” of the title is an alien starship, initially mistaken for an asteroid categorised as “31/439”. It is detected by astronomers in the year 2131 while it is still outside the orbit of Jupiter. Its speed (100,000 km/h) and the angle of its trajectory clearly indicate it is not on a long orbit around the sun, but comes from interstellar space. The astronomers’ interest is further piqued when they realise the asteroid has an extremely rapid rotation period of 4 minutes and is exceptionally large. It is named Rama after the Hindu god,[6] and an unmanned space probe dubbed Sita is launched from the Mars moon Phobos to intercept and photograph it. The resulting images reveal that Rama is a perfect cylinder, 20 kilometres (12 mi) in diameter and 54 kilometres (34 mi) long, and almost completely featureless, making this humankind’s first encounter with an alien spacecraft.
https://en.wikipedia.org/wiki/Rendezvous_with_Rama
Science fiction is filled with this stuff...
I read the book Rendezvous with Rama and commented here on how I liked it a lot- and a wonderful Freeper sent me the next two books in the series- I wish I had been able to find the messages and thank him/her properly here.
But in case you’re listening - I promise I did ‘pay it forward’ many times over with other books I’ve gifted to people.