LOCAL BUBBLES

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Context:

• Researchers from the Center for Astrophysics (CfA) | Harvard & Smithsonian have generated a 3D magnetic map of the cavity called Local Bubble. The Local Bubble is a 1,000-light-year-wide cavity or a superbubble.

Local Bubble

• The Local Bubble, or Local Cavity, is a relative cavity in the interstellar medium (ISM) of the Orion Arm in the Milky Way.
• It contains the closest of celestial neighbours and among others, the Local Interstellar Cloud (which contains the Solar System), the neighboring G-Cloud, the Ursa Major Moving Group (the closest stellar moving group) and the Hyades (the nearest open cluster).
• The exceptionally sparse gas of the Local Bubble is the result of supernovae that exploded within the past ten to twenty million years.  Supernova is a cosmic explosion occurring when stars meet their end.
• There are many other superbubbles that exist in the Milky Way.

Final Thought

• Space is full of these superbubbles that trigger the formation of new stars and planets and influence the overall shapes of galaxies.

https://www.downtoearth.org.in/news/world/bubble-of-secrets-here-s-what-the-new-3d-map-of-a-gigantic-cosmic-cavity-tells-us-about-the-universe-87090