NASA has selected two science missions - the Multi-slit Solar Explorer (MUSE) and HelioSwarm - to help improve our understanding of the dynamics of the Sun, the Sun-Earth connection, and the constantly changing space environment. These missions will provide deeper insights into our universe and offer critical information to help protect astronauts, satellites, and communications signals such as GPS.


  1. MUSE and HelioSwarm will provide new and deeper insight into the solar atmosphere and space weather.
  2. These missions not only extend the science of our other heliophysics missions -- they also provide a unique perspective and a novel approach to understanding the mysteries of our star.

About MUSE mission

  1. The MUSE mission will help scientists understand the forces driving the heating of the Sun's corona and the eruptions in that outermost region that are at the foundation of space weather.
  2. The mission will offer deeper insight into the physics of the solar atmosphere by using a powerful instrument known as a multi-slit spectrometer to observe the Sun's extreme ultraviolet radiation and obtain the highest resolution images ever captured of the solar transition region and the corona.
  3. The mission will also provide complementary observations from heliophysics research such as the Extreme UltraViolet Spectroscopic Telescope and ground-based observatories.
  4. MUSE will help us fill crucial gaps in knowledge pertaining to the Sun-Earth connection.

About HelioSwarm Mission

  1. The HelioSwarm mission is a constellation or "swarm" of nine spacecraft that will capture the first multiscale in-space measurements of fluctuations in the magnetic field and motions of the solar wind known as solar wind turbulence.
  2. The Sun's outermost atmospheric layer, the heliosphere, encompasses an enormous region of the solar system.
  3. Solar winds spread through the heliosphere, and their interactions with planetary magnetospheres and disruptions such as coronal mass ejections affect their turbulence.
  4. The technical innovation of HelioSwarm's small satellites operating together as a constellation provides the unique ability to investigate turbulence and its evolution in the solar wind.