What is the giant bubble blown by Orion?

All subgroups of Orion, together with a large number of small-mass stars, "nurtured" dozens of large-mass stars, and now some of them are evolving to the later stage, forming the brightest giant star and Supergiant star that Orion can observe with the naked eye. In addition, more massive stars produced by this subgroup have disappeared. Under the combined influence of radiation from these stars, stellar winds and supernova explosions, amazing Supergiant star bubbles with a diameter of 300-900 light years are formed. This super bubble flashes in the soft X-ray band, and its huge low density is filled with extremely high temperature plasma. It is called "Orion's cloak" and extends from the eastern edge of Orion to the western edge of the constellation Bojiang.

The Orion Supergiant star bubble caught up with the rest of the original nebula during its expansion. The resulting compression helps to trigger a new storm of star formation. And the massive members of these constellations will use their own energy to support the deployment of Orion's cloak. The formation of stars develops in waves from northwest to southeast. Orion A and Orion B nebulae are the remains of the huge molecular cloud of the original Orion.

In addition to the huge Orion A molecular cloud and Orion B molecular cloud, many smaller clouds are hidden inside the cloak of Orion. Light from Orion's massive star and plasma from inside the Supergiant star bubble carved them into coma clouds. They have dense heads and tails that diverge from the center of Orion.

When rushing to the surrounding interstellar space extremely quickly, the expanding Orion super bubble took away a lot of gas and dust. The light emitted by this warm dust can be observed in the far infrared band of the spectrum. In recent decades, several NASA satellites have photographed the glowing gas shells of Orion from space, and the images obtained by ground radio telescopes show that these huge gas shells are expanding. The gas shell is ionized by the existing massive stars towards the edge of the OB star association, and it is found that it is a huge fibrous nebula composed of luminous hydrogen plasma.