Terran Sun

The Terran Sun is the central star of the Terran Solar System, and what gives Earth the light and heat it needs to support life. However, coming even close to it would be vitual suicide, and the heat alone would spell doom for a space traveller.

In Ultima II, the Stranger had to withstand the temptation to enter the coordinates "4, 4, 4", as this were the coordinates of the sun, and hyperjumping there would have resulted in an instant destruction of the rocket and its pilot.

Trivia

 * That it is even possible for the player to fly into certain death -most likely without knowing- and without warning is proof, that in the early 80's, games were in a different league of offering frustration-bait.