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What is heliophysics?

Heliophysics is the integrated study of the Sun, its planets, and space environment as a dynamic system. It focuses on the Sun's turbulent magnetic activity and its effects on the upper atmosphere of Earth, as well as on other solar system planets and the surrounding heliosphere.

It encompasses many areas of inquiry: cosmic rays and particle acceleration, space weather and radiation, dust and magnetic reconnection, solar activity and stellar cycles, aeronomy and space plasmas, magnetic fields and global change, and the interactions of the solar system with our galaxy.

How does it benefit us?

Heliophysics has great value for two reasons. It is critical in understanding space weather and its potentially crippling impacts on our vital technologies: our satellites, communications and navigation signals, and power grids. This understanding guides our mitigation strategies. 

Heliophysics also teaches us about habitability. In studying the Sun’s changing effects on planetary atmospheres, we can learn by proxy about another star’s effects on the atmospheres of its exoplanets. This knowledge will support our search for life elsewhere in the universe.


Call for 2024 Jack Eddy postdocs

Call for 2024 NASA Jack Eddy Postdoctoral Fellows

UCAR | CPAESS and NASA are excited to announce our call for the 2024 NASA Jack Eddy Postdoctoral Fellowship class. Find out more about this opportunity focusing on the interdisciplinary field of heliophysics.

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Heliophysics Summer School

An announcement to apply to the Heliophysics Summer School is coming soon. See the presentations (including video recordings) of the 2023 Summer School.

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2023 NASA Jack Eddy Symposium

The 4th Eddy Symposium was successfully held from October 30 to November 3, 2023, in Golden, Colorado. Check out the presentations from this symposium

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3rd Jack Eddy Symposium: Stellar Collaborations

The 3rd Eddy Symposium was focused on processes in connected systems such as Sun-Earth relations, weather-climate connections, and novel star-planet interactions.  

Read an article about the Symposium which was held in June, 2022.

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Summer School Shines a Light on the Interdisciplinary Nature of the Sun

The 2022 Heliophysics Summer School's theme was “Connecting the Heliosphere: Using Global Models to Connect In-situ and Remote Sensing Data Throughout the Heliosphere.” 

Read an article about the 2022 Summer School.

Explore the Sun-Earth connection

For grad students & early postdocs

Focus on the physics and impacts of Sun-generated
space weather events

For early-career PhDs

Perform cross-disciplinary research under
experienced scientist mentors at U.S. institutions

For faculty & students

Access presentations, problem sets and solutions,
textbooks, and more from past Summer Schools

For researchers & engineers

Collaborate to outline new space weather research
that will critically improve an existing technology area

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Partners in nurturing a new science

NASA and CPAESS logos


NASA's Living With a Star Program (LWS) and UCAR Community Programs' Cooperative Programs for the Advancement of Earth System Science (CPAESS) partnered in 2006 to launch the Heliophysics Summer School. Since then they have worked to foster heliophysis as an integrated science, teaching a new generation of researchers to engage in cross-disciplinary communication.

See the history behind the partnership