Blazars constitute a particular class of so-called active galaxies (AGNs). These exotic objects emit huge amount of energy.
Blazars host very masive black holes in their centers, surrounded by accretion discs and toruses. Their high-energy radiation is mostly emitted in
collimated streams called jets. The emission of such objects is dominated by the relativistically boosted, non-thermal emission of the jets observed at
a small angle to the observer on Earth. In the case of blazar SBS B1646+499, the galaxy activity phase associated with the jet production has already
occurred at least twice. The results obtained by astronomers from Cracow are accepted by Astrophysical Journal.