THE spectra of helium and hydrogen have acquired considerable importance in view of the recent experimental researches of Prof. Fowler and the theoretical investigations of Dr. Bohr. Before the ...

Galactic cosmic rays (GCRs) are energetic particles traveling across the Galaxy as high-energy beams, and are a unique probe to explore the astrophysical particle accelerators and the interstellar ...

IN a recent communication Deeming and Walker 1 have found that for hot stars there is a significant positive correlation between their helium line strengths and their apparent rotational velocities.

Scientists in the European collaboration PAMELA say they have evidence that challenges the current theory of how cosmic rays are accelerated through the universe. According to the team, the spectra of ...