Currently the question that challenges most astronomers is, ‘why is the sky dark at night despite so many stars?’. Surely the sky...
Two months after the launch in April 1990 of the Hubble Space Telescope (HST), it was found that its primary mirror was...
The energy of the cosmic rays nuclei covers a wide range from one million electron volt (MeV) to about 1020 eV, which...
When Albert Einstein confirmed the atomic theory of matter, he surprised experts by declaring that starlight would be deflected by gravity. People...
We have seen how Karl Jansky found radio waves from an unexpected direction in space, which were subsequently attributed to cosmic sources....
Gamma rays from outer space are in the news. Recent satellite and telescope discoveries have located their origin. In the process, new...