You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
15 min 31 g cheela generation<br />
29 sec 1 g = 1 great = 144<br />
turns<br />
(equiv. to human year)<br />
0.2 sec 1 t = 1 turn of Egg (equiv. to human day)<br />
17 msec 1/12t =dothturn (equiv. to human hour)<br />
1.4 msec 1/144t = grethturn (equiv. to human 10 min)<br />
115 msec 1/1728t = methturn (equiv. to human minute)<br />
10 msec 1/20736t = sethturn (equiv. to human 4 sec)<br />
800 nsec 1/28832t = blink (equiv. to human blink)<br />
OUR NUCLEONIC FRIENDS<br />
One can hardly imagine a more alien life form than a cheela. A typical cheela weighs the same as a<br />
typical human, about 70 kilograms; but the nuclei in the cheela body have lost their electron clouds, so<br />
the nuclei are condensed into a tiny body that is squashed by the high gravity and stretched by the high<br />
magnetic field into an oval pancake shape a half-centimeter in diameter and a half-millimeter high—alittle<br />
larger than a sesame seed.<br />
The body is tough and flexible, with a tread on the bottom like that of a slug. Unlike a slug, a cheela can<br />
move equally well in any direction. The cheela have twelve eyes spaced around their periphery, giving<br />
them 360-degree vision. The eyes are up on stalks like those of a slug, but because of the high gravity the<br />
stalk is thicker. The cheela see using the ultraviolet and soft X-rays emitted by the 8200-K glowing<br />
surface of Egg.<br />
Despite their alien appearance, the cheela are not thought of as ugly, terrifying monsters. Instead, they<br />
have become our friends. One suspects that their small size may have something to do with it, as well as<br />
the fact that they cannot use anything on Earth, or even the Earth itself. Anything made out of normal<br />
matter would collapse at a touch from their ultra-dense nucleonic bodies.<br />
LIFE ON A NEUTRON STAR<br />
Living on a neutron star is very different from living on the Earth, but our friends, the cheela, find it very<br />
pleasant. The very high gravity field of 67 billion times Earth gravity means that everything must be built<br />
low to the crust and very sturdy. The very high magnetic field of a trillion gauss tends to elongate objects