A particle of charge q and mass m moves in the uniform fields E⃗ =E0k^ and B⃗ =B0k^. At t = 0, the particle has velocity v⃗ 0=v0i^. What is the particle's speed at a later time t?

Indoraptor for sure

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

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.