The Loop I Bubble is a cavity in the interstellar medium (ISM) of the Orion Arm of the Milky Way.

From our Sun's point of view, it is situated towards the Galactic Center of the Milky Way galaxy.

[2] The Loop I Bubble is located roughly 100 parsecs, or 330 light years, from the Sun.

The Loop I Bubble was created by supernovae and stellar winds in the Scorpius–Centaurus association, some 500 light years from the Sun.

The Loop I Bubble contains the star Antares (also known as Alpha Scorpii).