Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Hubble sightings:

GALAXIES: Hubble sightings
NEBULA: Hubble sighting
COMET: Many a Hubble sighting
NEBULA: Many a Hubble sighting
NOVA: Hubble Space Telescope sighting