The Death Star refers to two small moons that are not small moons at all, but space stations. The first Death Star was built a long, long time ago in a galaxy far, far away. This is also true of the second Death Star.
The First Death Star
The brainchild of Neimodian think monkeys, the Death Star was initially envisioned to be a series of fast food chains serving slow-roasted sandwiches and soft muffins with blue sauce. Neimodian Food Unlimited Corporation representatives approached potential investor Count Dooku (whose fried chicken chain took planet Calrissian by storm) with their schematics. Dooku then took the schematics to his master, Darth Sidious, who then uttered the famous statement "you know, put a big ass laser on this thing and we could blow up a fucking planet."
Initially hiring Chinese contract labor, Sidious (by this time known as Emperor Palpatine) decided to shift to Wookiee slaves, to narrow down the language barrier and after a group of workers in the south sector walked off the project site with the schematics and built a bootleg Death Star of their own that played MP3s and had 8-bit GUIs. This bootleg version existed for a total of seven days before shutting down and crashing into the fertile planet of Arrakis, turning it into a wasteland and mutating its worm population.
After an inauguration notable for a particularly disastrous superlaser ribbon cutting ceremony, control was handed over to Grand Moff Wilhuff Tarkin, a man notable for continuing debate over whether his title or his name are more disastrous.
Under Tarkin's watch, the Death Star was famous for being the galaxy's largest productivity wasting meeting room and the largest detention center to hold a total of one prisoner (as the three million or so other dissidents were simply fed to the trash compactor). The big-ass laser would go on as well to blow up a total of exactly one planet, which had a total confirmed population of three.
Unfortunately, due to major defects in construction, this space station did not last for long. Imperial records state faulty wiring on an air conditioning valve caused a gradual critical meltdown, blowing up the reactor core, one million personnel, and Wilhuff.
The first Death Star was a fully armed and operational battle station, with a full complement of turbolasers, missile launchers, freeze rays, death rays, disintegrator rays, manta rays, sugar rays, and Ray Charles recordings. Its numerous floors were divided accordingly into defense, administration,
sex houses leisure, dining and VHS rental. The seven washrooms aboard are capable of accommodating tens of people at one time. plus a fully working kitchen area, with dishwasher and microwave oven. for all those stormtrooper burritos. on the 7th level there is a taco bell, JC penny's, TGI fridays, and Darth's Laundromat, and for some strange reason a 2m wide hole that apparently blows it up.
Death Star as Weapon
So reliable is the deadly curse power of the Death Star that it has become a popular mechanism of assassination, the traditional approach being to point towards it in the company of the hapless victim, exclaim "That's no moon!" and watch as their eyes are diverted skywards, leading them to superstitious suicide.