1. Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992)
   - Oort

Type of: astronomer, stargazer, uranologist

• bluish-violet
• bluish-white
• blunder
• blunder out
• blunderbuss
• blunderer
• blunderingly
• blunger
• blunt
• blunt file
• blunt trauma
• blunt-leaf heath
• blunted
• bluntly
• bluntness
• blur
• blurb
• blurred
• blurrily
• blurriness
• blurry
• blurt
• blurt out
• blush
• blush wine