Skip to main content
Science Mission Directorate
Science
Discover
Universe
Solar System
Sun
Earth
Missions
Science & Technology
Science News
Science@NASA
Press Releases
People
For Researchers
Overview
FAQ
Grant Funding
Letters From SARA
ROSES Blog
NAC Science Committee
Our Team
Data & Pubs Rules
Learners
Overview
Team
Hotline
Reach Map
Learner Opportunities
Nuggets
Wavelength
Space Place
Citizen Scientists
Get Involved
Toolkits
Inspiration
Upcoming Events
Email Sign Up
Connect
Scientist Chats
Event Maps
Visual Presentations
About Us
Overview
Science Leadership
Science Strategy
Communications
Contact Us
Job Opportunities
Ask
Ask a Question
Sun
Overview
What We Study
Programs
Missions
Science Questions
Resources
Helio Connects
Mysteries of the Sun
Solar Variability
< Back to Mysteries of the Sun homepage
Mysteries of the Sun
Space Weather
Solar Variability
Heliosphere
Earth's Magnetosphere
Ionosphere, Thermosphere, and Mesosphere
Download the Mysteries of the Sun book (40MB PDF)
Recommended Articles
Fieldset
Understanding the Outer Reaches of...
March 30, 2018
Fieldset
The 2017 Total Solar Eclipse
August 18, 2017
Fieldset
Southern Hemisphere Solar Eclipse
February 24, 2017
Fieldset
Twinkle, Twinkle, GPS
June 14, 2016
Ask a Question
Discover
Universe
Overview
What We Study
Dark Energy, Dark Matter
Black Holes
The Big Bang
Galaxies
Stars
Exoplanets
Programs
Physics of the Cosmos
Cosmic Origins
Astrophysics Explorers
Exoplanet Exploration
Astrophysics Research
Astrophysics Div Technology
NASA Balloon Program
NASA Sounding Rockets
Missions
Science Questions
How does the universe work?
How did we get here?
Are we alone?
Astro Data
HEASARC
MAST
NExScI
NED
IRSA
SIMBAD
ADS
Documents
Astrophysics Roadmap
Solar System
Overview
What We Study
Inner Solar System
Outer Solar System
Small Bodies of the Solar System
Programs
Discovery
Mars Exploration
New Frontiers
Outer Planets Flagship
Robotic Lunar Exploration
SSERVI
Small Sats
Missions
Science Questions
HORIZONS System
How did life begin and evolve on Earth?
How did the solar system evolve?
How did the sun's family originate?
National Space Science Data Center
Planetary Data System
Regional Planetary Image Facilities
What are the characteristics of the Solar System?
Documents
Planetary Data
Solar System
Sun
Overview
What We Study
Recent Research
Solar Science
Space Weather
Explorers
Magnetospheres
Heliosphere
Living With a Star Research
Solar Eclipses
Programs
Heliophysics Research
Balloons
CubeSats
Leadership
Solar Terrestrial Probes
Living with a Star
Sounding Rockets
Data Programs
Working Groups
CCMC
National Space Weather Program
Missions
Science Questions
What causes the sun to vary?
How do Earth, the planets, and the heliosphere respond?
What are the impacts on humanity?
Resources
Senior Reviews
Vocabulary
Roadmaps
Org Charts
Helio Connects
Newsletters
Events
Science and Technology Highlights
Earth
Overview
What We Study
Programs
GOES / POES
Research and Analysis
Atmospheric Composition
Weather
Our Climate
Oceanography
Climate Variability & Change
El Niño
Water & Energy Cycle
Carbon Cycle & Ecosystems
Our Surface
Applied Sciences
Earth System Science Pathfinder
Common Instrument Interface
CII Guidelines Working Meeting
CII Reference Documents
CII Workshop 1
CII Workshop 2
CII Workshop 3
ESSP Program Library
Airborne Science
Technology
Missions
Science Questions
Documents
Earth Data
Climate Change Policy Speaker Series
Earth Science Data
Every Day is Earth Day
Global Challenges
Missions
Science & Technology
Overview
Science Programs
Technology Stories
Science News
Science@NASA
Press Releases
People
For Researchers
Overview
FAQ
Grant Funding
Letters From SARA
ROSES Blog
NAC Science Committee
Overview
Meetings
Members
Science Advisory Committees
Astrophysics Advisory Committee
Earth Science Advisory Committee
Heliophysics Advisory Committee
Planetary Science Advisory Committee
Applied Sciences Advisory Committee (ASAC)
Subcommittees
Planetary Protection
Ad-Hoc Big Data Task Force
Our Team
Program Officers List
Advisory Committees
Volunteer for Review Panels
Data & Pubs Rules
Learners
Overview
Team
Hotline
Reach Map
Learner Opportunities
Nuggets
Wavelength
Space Place
Citizen Scientists
Get Involved
Toolkits
Inspiration
Upcoming Events
Email Sign Up
Connect
Scientist Chats
Event Maps
Visual Presentations
About Us
Overview
Science Mission Directorate
Science Leadership
Leadership Team
SMD Organization Chart
Science Strategy
Science Strategy
Decadal Surveys
Year in Review
2015
2014
2013
2012
2011
2010
2008
2007
2006
2005
2004
Communications
Contact Us
Job Opportunities
Ask