| Operating at a wavelength of 2 centimetres, it was used to study galactic and extragalactic objects that emit radio waves, such as quasars. |
| A number of BL Lac objects are known in the vicinity of clusters of galaxies so this provides indirect evidence in support of their extragalactic nature. |
| Dr. Fahlman has authored or co-authored approximately 150 scientific articles in many areas of stellar and extragalactic astronomy. |
| In the 1930s and '50s he made estimates of the age of the universe from meteorites and from galactic and extragalactic statistics. |
| These observations are an important sterp forwards an independent verification of the extragalactic distance scale by interferometry. |
| The image of the cosmos as seen at VHE is becoming richer with the addition of a new type of extragalactic sources, the radiogalaxies. |
