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?

From the observations and the events that incurred you can tell that the star is made up of a distorted mass and weight. In order to calculate if weather or not that the observation is applicable you must use special tool to observe the star closer. Stars, planets, and any astonormal materials is mainly built or composed of a higher mass than objects on earth. 

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Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3