1.   NASA has launched a spacecraft to study the sun.

2.   The mission is to study the sun.

3.   One of the satellites being carried by Endeavour is to study the sun and the other is for semiconductor research.

4.   The Magion and Interball launches are part of an international program to study the sun.

5.   Astronauts from the space shuttle Discovery retrieved Thursday a satellite launched two days ago to study the sun.

6.   The second satellite, which caused trouble when the astronauts attempted to retrieve it for the flight home, was to study the sun.

7.   The second satellite, which caused trouble when the astronauts tried to retrieve it for the flight home, was to study the sun.