... ESO, the European Southern Observatory . ... United Kingdom . ... ESO . ... Although it is still situated beyond the orbit of Jupiter, it is so bright that it can be observed in even small telescopes. ... It is in fact likely that most of the light observed from the central condensation in the comet's head is sunlight reflected from the particles in this cloud. ... Consequently, Comet Hale-Bopp was observed soon after its discovery from the ESO La Silla Observatory with no less than seven telescopes...