Stars that move closer to the observer will be percieved as blue in the electromagnetic spectrum while starts moving away from the observer will appear red and orange. This is what is called the Doppler shift effect. This phenomenon is similar to the higher pitch of the siren of an ambulance approaching you and the low pitch of the siren when the ambulance passes you and is moving away from you.
The winds that pushing the sasiling ship from north, but they are also curving to west. theses winds are known as : d. polar easterlies. polar easterlies is the wind are blowfrom east to west.
