Images of supernovae remnants (SNRs) and heavy young
stars in stellar nurseries clearly show “bubble-like” features. Some of these
cavities are expanding at several hundreds of km/sec and are filled with HOT
X-ray and UV-emitting gas.
Our Galaxy is thought to be filled with a
honeycomb-like structure of expanding and interacting interstellar features
(“super bubbles”) that are the main driving force in the star formation
process
Cygnus Loop SNR SNR 1006 NGC 7635 Stellar Wind Bubble
