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a star appears to be red in the night sky. is the star traveling toward the earth or away from the earth? how do we know this?

explain

answer: away from the earth

explanation: when the star appears red that means its moving further from the earth

hope this ! good ! ; )

answer:

explanation:

if that star is hurtling away from us, all those absorption lines undergo a doppler shift and move towards the red part of the rainbow – a process called redshifting. if the star turns around and now comes flying towards us, the opposite happens. this is called, not surprisingly, blueshifting.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.