'1st U.S. woman astronomer, M. Mitchell, found these solar phenomena are whirling cavities, not clouds'
Sunspots
SCIENTISTS: 1st U.S. woman astronomer, M. Mitchell, found these solar phenomena are whirling cavities, not clouds
1st U.S. woman astronomer, M. Mitchell, found these solar phenomena are whirling cavities, not clouds
1st U.S. woman astronomer, M. Mitchell, found these solar phenomena are whirling cavities, not clouds
SCIENTISTS
Sunspots
SCIENTISTS