1.   Bethe was the first scientist to describe the nuclear fusion process by which the sun gets its energy.

2.   A separate goal of the nonatomic approach was to slow and harness the fusion process, for both physics studies and energy research.

3.   A related problem has to do with neutrinos produced by the fusion process in the sun.

4.   A related but different problem has to do with neutrinos produced by the fusion process in the sun.

5.   Stars take shape within huge dust clouds when interstellar gases contract under their own gravity, eventually condensing into hot clumps that ignite the hydrogen fusion process.

6.   The fusion process is hard to start.

7.   This fusion process, the researchers said, exposed HIV molecules that are not open to attack at other times in the infection cycle.

8.   The gas is so compressed that it collapses under its own weight, giving rise to the star-making nuclear fusion process.