The period of a cepheid variable star and the time of one recent maximum can be used to predict the time of a future maximum. suppose that you calculate the time of future maximum brightness and then make measurements to observe this maximum. after the correction for earth's orbital position has been made, you find that the maximum occurred a few minutes later than predicted. what does this tell you about this star?

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.