You might not appreciate disgusting slimy ground that causes you to slip, but you'll sure like the glowing blocks that make it very easy to find ores (such as Thorium Ore or Uranium Ore).
These worlds are poisonous, have mild weather (humid, normal temperature). The stickiness and sliminess of this world will slow you down slightly, and will reduce your friction with the ground. Watch your step!
Codex description
A gelatinous slimy world. High elasticity. Strange, massive life forms and a poisonous atmosphere.
Slime forms almost this entire planet. Huge nocturnal creatures detected. The atmoshpere is full of poisonous vapours.
A bouncy, sticky gelatinous world. It is evident that this will make for some rather gross exploration. Poisonous atmosphere detected.
Details
Name: Gelatinous
Tier: 2 - 4.4
Found around stars: Gentle Star, Temperate Star, Radioactive Star, Binary Star, Red Star, Blue Star
Mild Poison (Resist: Poison) (immune at: 20% Poison)
