block
verse
w
o
rdys
billionaire
.ai
your
list
Whiteboard
App
quizie
un
school
New Journal
News
Home
Popular
Elections
Share
Genius — OpenServe
Sponsored
Helen Pettit Knaflich — latest news, discussion & facts — IJR
Helen Pettit Knaflich
Share
astronomer
Helen Pettit Knaflich
American astronomer (1920–1985)
Ask Genius
Site
Site
Journal
Feed
Discussions
About
Related journals
Family
Edison Pettit
Hannah Steele Pettit
Marjorie Meinel
Connected
Claremont Colleges
Boeing
Smithsonian Astrophysical Observatory
Sunspot Solar Observatory
United States