First Female US Astronaut Sally Ride Dies at 61

 Former U.S. astronaut Sally Ride, the first American woman to fly in space, died Monday after a long battle with pancreatic cancer.  She was 61 years old. 

Ride, who earned four degrees, including a doctorate¹ in physics, from Stanford University was part of the first NASA class for astronauts to accept women in 1978.

She joined four male astronauts on the crew of the Space Shuttle Challenger in June 1983 and became a hero to young girls across the United States as the first American woman in space.

Ride flew on Challenger again in 1984.  She was a member of the panels² that investigated the Challenger accident in 1986 and the destruction of the Space Shuttle Columbia in 2003.

She also founded a company whose mission was to motivate girls and young women to pursue careers in science, math and technology.

President Barack Obama issued a statement calling Ride "a national hero and powerful role model" who advocated a greater focus on math and science in U.S. schools. 

1 doctorate   

n.(大学授予的)博士学位

参考例句：

• He hasn't enough credits to get his doctorate.他的学分不够取得博士学位。
• Where did she do her doctorate?她在哪里攻读博士？

2 panels   

镶板( panel的名词复数 )； 面； （门、墙等上面的）嵌板； 控制板

参考例句：

• One of the glass panels in the front door was cracked. 前门的一块方玻璃破裂了。
• Make sure the panels are treated with a wood preservative. 确保镶板用木材防腐剂处理过。