Possible Clues:

• Observatory sighting
• Cloud of interstellar gas and dust
• Distant cloud?
• A little cloudiness, although it could be blue in North America
• Mass of interstellar gas
• Cloud in Orion
• Ben returning with you to American city ¿ that¿s bound to create a lot of dust in that space
• Space cloud .
• Cloud seen with a telescope
• Many a Hubble sighting