Bohr's model of the atom included a positively charged orbited by negatively charged
i don't understand this question.

Bohr's model of the atom included a positively charged nucleus orbited by negatively charged electrons.

The atom is made up of 3 particles:
Proton - positively charged particle
Neutron - neutral or no charge
Electron - negatively charged

The protons and neutrons make up the nucleus of the atom and because the neutrons have no charge, the nucleus is positively charged because of the presence of the protons. The electrons orbit it because they are attracted by the charge of the nucleus because they are oppositely charged. 

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.