Solar and Heliospheric Observatory (SOHO)

Mission: Solar and Heliospheric Observatory
Mission type: Solar observations, space weather predictions
Launch date: December 1995
Launch vehicle: Atlas IIAS
Mission duration: 2 yr planned; 15+ elapsed
Orbit location: Earth-Sun L1 point
Status: ActiveOverview: The three main scientific objectives of SOHO are:
--Investigation of the outer layer of the Sun, which consists of the chromosphere, transition region, and the corona.
--Making observations of solar wind and associated phenomena in the vicinity of L1.
--Probing the interior structure of the Sun.

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SOHO Images

SOHO Mission Profile

ESA Links

Wikipedia Links

NASA Missions

NASA Solar System

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mdi20031028.jpg Sunspots
Active region 10486 became the largest sunspot seen by SOHO, It unleashed a spectacular show on 28 October 2003. An X 17.2 flare, the second largest flare observed by SOHO and the third largest ever recorded, blasted off a strong high energy proton event and a fast-moving Coronal Mass Ejection. The spot occupied an area equal to about 15 Earths, a size not seen since 1989. It later fired off the largest X-ray flare recorded, on 4 November 2003.

superprom.jpg Prominence of 09/14/1999
Emission in this spectral line (EIT 304Å) shows the upper chromosphere at a temperature of about 60,000 degrees K. Every feature in the image traces magnetic field structure. The hottest areas appear almost white, while the darker red areas indicate cooler temperatures.

sunparts_prev.jpg Sun Overview
The three major interior zones are the core (the innermost part of the Sun where energy is generated by nuclear reactions), the radiative zone (where energy travels outward by radiation through about 70% of the Sun), and the convection zone (in which convection currents circulate the Sun's energy to the surface). The flare, sunspots and photosphere, chromosphere, and the prominence are all clipped from actual SOHO images of the Sun.

MOVIES ___________________


SS-simulator.jpg Solar System Simulator - JPL

logo-eotss-main.png Eyes on the Universe - JPL

MapAPlanet-banner.jpg Map a Planet - USGS

Documents and PowerPoints

Related MGGP Links
Seeing the Sun
Solar Dynamics Observatory

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