Consider the following facts:

1. In nuclear fusion, two atomic nuclei collide at very high speed to form a third nucleus.
2. The energy of the sun is derived from Helium nuclei colliding at high speeds to fuse and form a Hydrogen nucleus.

Which of the above is/are true?

In nuclear physics, nuclear fusion is a nuclear reaction in which two or more atomic nuclei collide at a very high speed and join to form a new type of atomic nucleus. For example, the energy that the sun emits into space is produced by nuclear reactions that happen in its core due to the collision of hydrogen nuclei and the formation of helium nucleus.