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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

NASA's MMS Observatories Stacked For Testing

NASA's MMS Observatories Stacked For Testing

04.18.14 – Engineers at NASA's Goddard Space Flight Center in Greenbelt, Md., accomplished another first. Using a large overhead crane, they mated two Magnetospheric Multiscale, or MMS, observatories – also called mini-stacks — at a time, to construct a full four-stack of observatories.

Next, the MMS four-stack will be carefully transported from their Goddard cleanroom to a special vibration facility — housed within the same immense integration and testing facility — where they will be secured to a large shaking table and subjected to vibration tests. These tests help to ensure the structural integrity of the stacked spacecraft prior to shipment to NASA’s Kennedy Space Center, Fla.

>> Read More

More EHPD News

04.18.14Sun Emits a Mid-level Solar Flare
04.17.14Bright Points Mark Patterns Inside Sun
04.16.14Unexpected Teleconnections in Noctilucent Clouds
04.11.14NASA Highlights Magnetospheric Multiscale Mission at Local Fair
04.10.14Appearance of Night-Shining Clouds Has Increased
04.03.14Take the Plunge: LADEE Impact Challenge — Submissions Now Closed
03.31.14NASA Releases Images of X-class Solar Flare
03.26.14The Search for Seeds of Black Holes
03.19.14Van Allen Probes Reveal Zebra Stripes in Space
03.18.14STEREO Studies Extreme Space Weather

>> 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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