All Nine Planets in the Solar System Have Been Visited

question 80

True/False

All nine planets in the solar system have been visited by spacecraft.

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Definitions:

Sheldon Cohen

A social psychologist known for his research on the relationship between stress, social support, and the immune system.

Common Cold

A viral infectious disease primarily affecting the nose and throat, characterized by symptoms such as sneezing, coughing, and a runny nose.

Psychoneuroimmunology

The study of how psychological processes, the nervous system, and the immune system interact and affect health.

T-cells

A type of lymphocyte that plays a central role in cell-mediated immunity, distinguishing between self and non-self molecules.