Volet de 1.5 tonnes installé à l'arrière du Boeing 747 SOFIA

1.5-tonne door installed at the aft end of the Boeing 747 SOFIA (Stratospheric Observatory for Infrared Astronomy) to protect the telescope that it houses. This telescope is equipped with a 2.5-m diameter mirror. The opening of this door enables SOFIA’s mirror (2.5 m in diameter) to be pointed towards space. The NASA flying observatory, based in Palmdale California, flies by night at high altitude (up to approximately 14 km) to observe the stars in infrared from the stratosphere. During this mission in February 2017, SOFIA enabled observation of the Orion Nebula, the region nearest to the solar system in which massive stars form. A map of Orion will thus be produced to characterise the dynamics of gases from observations of carbon ion emissions, very abundant in regions of star formation. SOFIA is also equipped with the GREAT instrument that converts the light collected by the telescope into scientific data.

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