B. Exercise No. 1 Directions: Fill in the blanks with the correct answer. Write your answers on a separate sheet of paper. 1.was a Danish astronomer and nobleman who made accurate observations of the movement of celestial bodies.
2.was a German astronomer and mathematician who worked as an ssistant to Brahe and formulated the three laws of planetary motion based on Brahe's extensive tronomical data
3. states that planets follow an elliptical orbit
4. states that when an imaginary line is drawn from the center of a et to the center of the Sun, an equal amount of space is swept in equal amount of time 5.states that the ratio of the squares of the period of two planets is equal ratio of the cubes of the planets' average distance from the Sun.​