Describe the technology that allows us to see beneath the surface of the sun

It lies hidden beneath the surface of the sun." Fortunately, SDO can look down there, too. The technique is called helioseismic imaging. By monitoring the sun's vibrating surface, SDO can probe the stellar interior in much the same way that geologists use seismic waves from earthquakes to probe inside Earth.

Explanation:

Hehehe

"It lies hidden beneath the surface of the sun." Fortunately, SDO can look down there, too. The technique is called helioseismic imaging. By monitoring the sun's vibrating surface, SDO can probe the stellar interior in much the same way that geologists use seismic waves from earthquakes to probe inside Earth.

source from NASA SCIENCE

equal distribution i think.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.