Answer:
Atmosphere of earth absorb most ultraviolet wavelengths
Step-by-step explanation:
The main reason is that the atmosphere of earth absorb most ultraviolet wavelengths.By doing this we can get clear view of planets like galaxies and stars .As we know that in the earth atmosphere there is a layer and which act like a blanket that is why all rays can not transmit from this blanket.The light blocks in this blanket.