Source: Starfinder Core Rulebook p.510
Half-orcs are Medium humanoids with both the human and orc subtypes.
Half-orcs can see up to 60 feet in the dark.
Half-orcs receive a +2 racial bonus to Intimidate skill checks.
Once per day, a half-orc brought to 0 Hit Points but not killed can fight on for 1 more round. The half-orc drops to 0 HP and is dying (following the normal rules for death and dying) but can continue to act normally until the end of his next turn, when he becomes unconscious as normal. If he takes additional damage before this, he ceases to be able to act and falls unconscious.
Half-orcs receive a +2 racial bonus to Survival skill checks.