Our #HubbleTopImage features a galaxy blowing bubbles! 🫧⁠ ⁠ This is the dwarf irregular galaxy Holmberg II, which has an indistinct shape punctuated by huge glowing bubbles of gas. These were created by the energetic lifecycles of many generations of stars.⁠ ⁠ High-mass stars form amid dense regions of gas, then expel stellar winds that blow this gas away 🌬️ At the very end of their lives, they explode in as a supernova. Shock waves rip through these less dense regions blowing out and heating the gas, forming the delicate shells we see today!⁠ For more information check the link in bio.⁠ ⁠ 📷 NASA & ESA⁠ ⁠ #ESA #Hubble