How to transport a ball of liquid, molten metal nearest to the Sun possible? It must be close to the Sun for the metal to stay molten.
However, to stay safely cool enough, the spacecraft must always remain in the shadow of the molten metal ball. Liquid iron would radiate intensively, this radiation (1500C) would be far lesser than the Sun's (6000K) a secondary heat shield for the radiant heat off the ball of metal would be needed.
How would a spacecraft stay in the shadow of the ball, unattached, and yet exert force on it in order to guide and adjust its trajectory repulsively?
This answer in this link helps with determining the metal: https://chemistry.stackexchange.com/questions/112627/what-emits-the-least-light-when-hot