SOHO

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SOHO

• (Solar Heliospheric Observatory)
• http//sohowww.nascom.nasa.gov/

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Background

• SOHO started by NASA and ESA
• Launched December 2, 1995
• Used to observe the sun
• Shows characteristics of sun

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About the Spacecraft

• Made of two modules
• Mass at launch 1850 kg
• 12 instruments

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Objectives of SOHO

• Solar interior
• Does solar corona exist?
• Heated to 1,000,000 degrees C
• Where solar wind produced
• How s.w. accelerated?

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• As of April 17th, this is what our sun looked
  like through the devices on SOHO

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Layers of the Sun

• 8 layers
• An arrow pointing to sunspots, flare, and coronal
  hole not layers

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The Module

• two major elements (Fig. 1), the Service Module
  (SVM) and the Payload Module (PLM).
• Service Module is a box-shaped structure made of
  aluminum honeycomb panels attached to a
  corrugated aluminum cylinder by four shear webs
• Payload Module provides an optical bench for the
  experiments and is composed of four upper lateral
  panels and a top panel connected to a central
  cylinder by a number of shear webs
• The SOHO Spacecraft

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