deverá ser binário

O nosso Sol terá certamente uma companhia distante e a Terra 'percebe' isso.

[...]The thing is, if this hypothetical 'Nemesis' body is actually plowing through the Oort cloud every 26,000 years instead 26 million years, then this implies that the comet threat has been grossly underestimated. (And downgrading the name 'Nemesis' to the euphemistic 'Tyche' - as some astronomers have done - is unlikely to make the comets go away!) [...]