Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible. ...

Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible. (Bill Bryson)

Bill Bryson Quotes Pictures

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.

Bill Bryson Quotes: Annie Jump Cannon (left) and Henrietta Leavitt, whose unsung labours and incisive deductions made Hubble's breakthroughs possible.