Im lighter than the feather but the strongest man can not hold me for long

You are a snowflake.

You are air because you weigh nothing, and yet the strongest man in the world could only hold it for 22 seconds.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

1.989×10^30 kg is the weight of the sun.