What creates the energy of the Sun? A. gravitational pull from its core
B. chemical reactions
C. nuclear fusion of hydrogen atoms
D. movement of magnetic materials in the core

C

Explanation:

During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

where are the vectors ?