The planet is named Uller (it seems that when interstellar travel was
developed, the names of Greek Gods had been used up, so those of Norse
gods were used). It is the second planet of the star Beta Hydri, right
angle 0:23, declension-77:32, G-0 (solar) type star, of approximately
the same size as Sol; distance from Earth, 21 light years.
Uller revolves around it in a nearly circular orbit, at a distance of
100,000,000 miles, making it a little colder than Earth. A year is of
the approximate length of that on Earth. A day lasts 26 hours.
The axis of Uller is in the same plane as the orbit, so that at a
certain time of the year the north pole is pointed directly at the
sun, while at the opposite end of the orbit it points directly away.
The result is highly exaggerated seasons. At the poles the temperature
runs from 120°C to a low of-80°C. At the equator it remains not far
from 10°C all year round. Strong winds blow during the summer and
winter, from the hot to the cold pole; few winds during the spring and
fall. The appearance of the poles varies during the year from baked
deserts to glaciers covered with solid CO_{2}. Free water exists in
the equatorial regions all year round.