Explanation: What role do magnetic fields play in interstellar physics? Analyses of observations by ESA's Planck satellite of emission by small magnetically-aligned dust grains reveal previously unknown magnetic field structures in our Milky Way Galaxy -- as shown by the curvy lines in the featured full-sky image. The dark red shows the plane of the Milky Way, where the concentration of dust is the highest. The huge arches above the plane are likely remnants of past explosive events from our Galaxy's core, conceptually similar to magnetic loop-like structures seen in our Sun's atmosphere. The curvy streamlines align with interstellar filaments of neutral hydrogen gas and provide tantalizing evidence that magnetic fields may supplement gravity in not only in shaping the interstellar medium, but in forming stars. How magnetism affected our Galaxy's evolution will likely remain a topic of research for years to come.
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Based on Astronomy Picture
Of the Day
Publications with keywords: Milky Way - magnetic field
Publications with words: Milky Way - magnetic field
See also:
- APOD: 2023 December 12 Á Aurora and Milky Way over Norway
- Milky Way Rising
- APOD: 2023 July 18 Á Milky Way above La Palma Observatory
- APOD: 2023 July 16 Á Meteor and Milky Way over the Alps
- APOD: 2023 July 2 Á Milky Way and Aurora over Antarctica
- APOD: 2023 June 20 Á The Nandu in the Milky Way
- APOD: 2023 May 29 Á Milky Way over a Turquoise Wonderland