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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.

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

Van Allen Probes Reveal Zebra Stripes in Space

NASA's Van Allen Probes Reveal Zebra Stripes in Space

03.19.14 – Scientists have discovered a new, persistent structure in one of two radiation belts surrounding Earth. NASA's twin Van Allen Probes spacecraft have shown that high-energy electrons in the inner radiation belt display a persistent pattern that resembles slanted zebra stripes. Surprisingly, this structure is produced by the slow rotation of Earth, previously considered incapable of affecting the motion of radiation belt particles, which have velocities approaching the speed of light.

>> Read More

More EHPD News

03.18.14STEREO Studies Extreme Space Weather
03.13.14Mid-Level Solar Flare Seen by NASA's SDO
03.07.14NASA's WISE Survey Finds Thousands of New Stars, But No ‘Planet X’
02.28.14Giant Sunspot Makes Third Trip Across the Sun
02.25.14NASA Embraces Challenge of Building 4 Spacecraft
02.25.14SDO Sees Significant Solar Flare
02.21.14NASA's IRIS Spots Its Largest Solar Flare
02.19.14RXTE Reveals the Cloudy Cores of Active Galaxies
02.19.14NASA's NuSTAR Untangles Mystery of How Stars Explode
02.13.14NASA Hosts Media Teleconference About Supernovas

>> Go to Newsroom

Explorers 4 New Missions

NASA Selects Explorer Projects To Probe Earth's Upper Atmosphere
News Release 04.12.13 – NASA has selected a new satellite mission and a new space-based instrument to begin development as part of the agency's Heliophysics Explorer Program.
>> Find more on ICON

NASA Selects Explorer Investigations for Formulation
News Release 04.05.13 – NASA's Astrophysics Explorer Program has selected two missions for launch in 2017: a planet-hunting satellite and an International Space Station instrument to observe X-rays from stars.

NASA Taps the Power of Zombie Stars in Two-in-One Instrument 04.05.13 – NICER will not only reveal why neutron stars are the densest objects in nature, but also demonstrate navigation technology that could revolutionize…
>> Find more on NICER


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

Updated 01.17.13
>> Org Charts

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

Missions Status

Explorers Missions

  • Astro-H
    Launch Date: November 2015
    Phase C/D: Design & Development
  • GOLD
    Launch Date: 2017
    Phase B: Preliminary Design & Technology Development
  • ICON
    Launch Date: February 2017
    Phase B: Preliminary Design & Technology Development
    Launch Date: August 2016
    Phase B: Preliminary Design & Technology Development
  • TESS
    Launch Date: August 2017
    Phase B: Preliminary Design & Technology Development
  • For all Explorers Missions

Living With a Star Missions

Solar Terrestrial Probes Mission

Planetary Missions

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 — Development
Check out MMS on Facebook Follow MMS on Twitter Check out MMS on YouTube
Follow MMS on Pinterest      
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