dust. The parabolic shape is caused by the widening of the stellar-wind blown cavity over time. Two additional structures can also be seen either side of the protostar, these are known as Herbig-Haro objects, again caused by the interaction of the outflow with the surrounding material. What causes the striations on the cavity walls, though, remains unknown. The featured image was taken by NASA and ESAŃs Hubble Space Telescope after an original detection by the Spitzer Space Telescope.
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Based on Astronomy Picture Of the Day
Publications with keywords: stellar wind
Publications with words: stellar wind