Science Fair Project(In Progress)

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California State University, Northridge *

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107

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Astronomy

Date

Oct 30, 2023

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docx

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Uploaded by CoachRiver11598

☼ Using the Solar & Heliospheric Observatory Satellite (SOHO) to Measure the Motion of a Coronal Mass Ejection ☼ Procedure: First, have to view the series of five images taken from one of the coronagraphs on LASCO. In each of the images, the white circle shows the size and location of the Sun. The black disk is the occulting disk blocking out the disk of the Sun and the inner corona. The tick marks along the bottom of the image mark off units of the Sun's diameter. To the right of the disk we can see a CME erupting from the Sun. ☼_☼

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Materials: ● ruler, ● calculator. ● computer with Internet connection and printer, Reference: http://www.sciencebuddies.org/science-fair- projects/project_ideas/Astro_p020.shtml

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The Solar and Heliospheric Observatory (SOHO) is a spacecraft built by a European industrial consortium led by Matra Marconi Space (now Astrium) that was launched on a Lockheed Martin Atlas II AS launch vehicle on December 2, 1995 to study the Sun, and has discovered over 3000 comets. It began normal operations in May 1996. It is a joint project of international cooperation between the European Space Agency(ESA) and Nasa. Originally planned as a two-year mission, SOHO continues to operate after over 20 years in space. In June 2013, a mission extension lasting until December 2016 was approved. The SOHO spacecraft is in a halo orbit around the Sun-Earth L1 point, the point between the Earth and the Sun where the balance of the (larger) Sun's gravity and the (smaller) Earth's gravity is equal to the centripetal force needed for an object to have the same orbital period in its orbit around the Sun as the Earth, with the result that the object will stay in that relative position.