The use of the relative movement and gravity of a planet or other celestial body to alter the path and speed of a spacecraft.

A phenomenon of visual perception caused by staring at a uniform field of colour, leading to a sensation of blindness and sometimes to hallucinations.

Alternative form of Stockholm syndrome

(psychology) A cognitive bias in which judgment of somebody's character is influenced by an overall impression of him or her.

A deleterious placebo effect.

(chemistry, physics) The effect that differing masses of different isotopes of the same element have on the physical and chemical properties of that element

The tendency for the peak luminance sensitivity of the human eye to shift toward the blue end of the spectrum at low illumination levels.

A hypothetical psychological effect through which people who live in close domestic proximity during the first few years of their lives become desensitized to later sexual attraction. It is one explanation for the incest taboo.

(psychology) A strong opposing response caused by attempts to restrict a person's freedom or change their attitudes.

The tendency of individuals to give high accuracy ratings to descriptions of their personality that are in fact vague and general enough to apply to a wide range of people.