ScienceJuly 4, 2026
heliophysics
/ˌhiːliəʊˈfɪzɪks/
Definition
The branch of science that specifically studies the physical processes, phenomena, and solar environment associated with the Sun and its influence on the solar system.
Etymology
The word combines the Greek 'helios' (sun) with 'physics,' the science of matter and energy. It was adopted in the late 20th century to describe the unified study of the Sun and its impact on the heliosphere.
In the news
The term appears in the article's navigation menu as a category of study for NASA, distinguishing the Sun's specific physical behavior from broader planetary or space sciences.
Northwest Earth and Space Science Pathways Project Celebrates Student Innovation Through ROADS from Earth to Venus National Challenge
Read the full article ↗NASA Science (.gov)