February 27, 2019
The light from the farthest visible stars set out on its journey long before your first birthday.
Magnetic Orion
Birthday · February 27, 2019
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APOD published February 27, 2019. Credit: NASA, SOFIA, D. Chuss et al. & ESO, M. McCaughrean et al.. A publication-date match, not a photo taken on your date. Independent of NASA.
Can magnetism affect how stars form? Recent analysis of Orion data from the HAWC+ instrument on the airborne SOFIA observatory indicate that, at times, it can. HAWC+ is able to measure the polarization of far-infrared light which can reveal the alignment of dust grains by expansive ambient magnetic fields. In the featured image, these magnetic fields are shown as curvy lines superposed on an infrared image of the Orion Nebula taken by a Very Large Telescope in Chile. Orion's Kleinmann-Low Nebula is visible slightly to the upper right of the image center, while bright stars of the Trapezium cluster are visible just to the lower left of center. The Orion Nebula at about l300 light years distant is the nearest major star formation region to the Sun.
Image credit: NASA, SOFIA, D. Chuss et al. & ESO, M. McCaughrean et al.