BREAKING: New Phase of Matter

If something is in motion, in space, doesnt it continue to move forever?  Not exactly my area of expertise but i find it interesting.  If what ive said is right, spin a windmill type device, in space and doesnt it continue to spin?  Based off of the fact, "nothing lasts forever", perpetual motion is impossible, so using streams of water, to make something spin, etc, wouldnt work but, isnt it considered, perpetual motion, based on a persons lifespan?  Idk, i need to learn more about this area, so take these ideas, with the knoweldge, that im a freshman, in this course.