G

• G-Cloud (1 C, 2 P)

L

• Local Bubble (5 C, 53 P)

P

• Pre-stellar cores (3 P)

S

• Superbubbles (8 P)

• Interstellar medium

B

• Bondi accretion
• Bonnor–Ebert mass

C

• Interstellar cloud
• Cosmic wind

D

• Diffuse interstellar bands
• Dust lane

E

• Elephant trunk (astronomy)
• Extraterrestrial materials

H

• Hubble bubble (astronomy)

I

• Interstellar ice
• Imidogen
• Infrared cirrus
• Interstellar formaldehyde
• Interstellar oxygen

J

• Jeans instability

L

• Le Gentil 3
• List of interstellar and circumstellar molecules
• Local Bubble
• Local Leo Cold Cloud
• Local Void
• Lockman Hole
• Loop I Bubble

M

• Maggie (astronomy)

N

• Nebula

P

• Photodissociation region
• Presolar grains

S

• Spinning dust
• Stellar-wind bubble