Heavy Planet

Hal Clement’s classic hard SF novellas here about alien contact, Mission of Gravity and Star Light, with a couple of connected short stories thrown in, make for wonderful reading, and some free education in elementary physics and chemistry.

MG hardly suffers from being so old that the humans employ slide rules and photographic film, and the author wisely continues it in the more recent SL. It’s also almost unnoticeable that there is, as other reviewers of his other books have pointed out, no sex and no violence—not even a sharp argument between the humans and the aliens.

Instead, the stories move along on resolving the inevitable hazards as the hydrogen-breathing Mesklinites (variously described as grotesque worms, caterpillars or centipedes about three feet long) explore their own high-gravity planet and, later, a similar one three parsecs away, as contract employees (and, simultaneously, students and respected friends) of the humans.

What makes it work is the interplay between the species and the way Clements’ aliens mimic human emotions and behavior, including occasional paranoia and deception, despite their significant physiological differences. I was sad to finish. It’s a pity the author is no longer alive to continue this rich story of human scientists, linguists and administrators hesitantly helping the Mesklinites gradually move from being sailors on methane seas in ammonia storms to pilots of interstellar spacecraft.