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Explorers and Heliophysics Projects Division (EHPD)

The Explorers and Heliophysics Projects Division (EHPD) consists of three programs: Explorers, Living With a Star (LWS), and Solar Terrestrial Probes (STP). The Explorers Program is an uncoupled Program which provides frequent flight opportunities for world-class scientific investigations from space within NASA Heliophysics and Astrophysics Space Science goals. Explorers projects are typically implemented in the Principal Investigator (PI) mode. The LWS Program is a loosely coupled Program which provides missions to improve our understanding of how and why the Sun varies, how the Earth and Solar System respond, and how the variability and response affects humanity in Space and on Earth. The STP Program is an uncoupled Program which provides missions to understand the fundamental physics processes from the Sun to Earth, to outer planets, and beyond to the interstellar medium.

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>> Read about Living With a Star
>> Read about Solar Terrestrial Probes

NASA's SDO Peers Into Huge Coronal Hole

NASA's SDO Peers Into Huge Coronal Hole

05.26.16 – This imagery of the sun captured by NASA's Solar Dynamics Observatory from May 17-19, 2016, shows a giant dark area on the star's upper half, known as a coronal hole. Coronal holes are low-density regions of the sun's atmosphere, known as the corona. Because they contain little solar material, they have lower temperatures and thus appear much darker than their surroundings. Coronal holes are visible in certain types of extreme ultraviolet light, which is typically invisible to our eyes, but is colorized here in purple for easy viewing.

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More EHPD News

05.23.16NASA: Solar Storms May Have Been Key to Life on Earth
05.19.16NASA Mini-Balloon Mission Maps Migratory Magnetic Boundary
05.19.16NASA's Van Allen Probes Reveal Long-term Behavior of Earth's…
05.18.16IRIS Releases New Imagery of Mercury Transit
05.12.16NASA Directly Observes Fundamental Process of Nature for 1st…
05.12.16Magnetic Reconnection Throughout the Universe (Infographic)
05.10.16Mercury Transit (Composite Image)
05.10.16Swept Up in the Solar Wind
05.06.16Hubble Spies the Barred Spiral Galaxy NGC 4394
05.03.16Satellites to See Mercury Enter Spotlight on May 9

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ehpd organization chart image used to link to all organization charts
Organization charts for the Explorers & Heliophysics Projects Division

Updated 03.16.15
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The Explorers and Heliophysics Projects Division mission to support Heliophysics, Physics and Astronomy

Missions Status

Explorers Missions

  • GOLD
    Launch Date: September 2017
    Phase C: Final Design & Fabrication
  • ICON
    Launch Date: June 2017
    Phase C: Final Design & Fabrication
    Launch Date: February 2017
    Phase D: System Assembly, Test, & Launch
  • TESS
    Launch Date: December 2017
    Phase C: Final Design & Fabrication
  • For all Explorers Missions

Living With a Star Missions

Solar Terrestrial Probes Mission

NET = No Earlier Than

Related Sites

Internal Sites

Connect with
Explorers Missions

IRIS — Operating
Check out IRIS on Facebook        
NuSTAR — Operating
Check out NuSTAR on Facebook Follow NuSTAR on Twitter      
TESS — Development
Check out TESS on Facebook Check out TESS on Google+ Follow TESS @ NASA on Twitter Follow TESS @ MIT on Twitter  
WISE — Operating
Check out WISE on Facebook Follow WISE on Twitter      

Connect with LWS

SDO — Operating
Check out SDO on Facebook Follow SDO on Twitter Check out SDO on YouTube Check out SDO on Flickr Check out SDO's Blog
Van Allen Probes — Operating
Check out Van Allen Probes on Facebook Follow Van Allen Probes on Twitter Check out Van Allen Probes on YouTube    

Connect with STP

HINODE — Operating
Check out HINODE on Youtube with NASA Check out SDO on Flickr      
MMS — Operating
Check out MMS on Facebook Follow MMS on Twitter Check out MMS on YouTube Check out MMS on Flickr Follow MMS on Pinterest
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