Question

.The period of one
rotation of the earth is known
as​

Answer 1

Earth's rotation period relative to the International Celestial Reference Frame, called its stellar day by the International Earth Rotation and Reference Systems Service (IERS), is 86 164.098 903 691 seconds of mean solar time (UT1) (23h 56m 4.098903691s, 0.99726966323716 mean solar days).