What happens with the spirit of a saint when he dies? I believe his spirit is transferred to a star. In other words, his spirit becomes a spirit of a star.

(Matthew 13:43) “Then the righteous will shine like the sun in the Kingdom of their Father.”

(Daniel 12:2-3) “Many of those who sleep in the dust of the earth shall awake, some to everlasting life, and some to shame and everlasting contempt. Those who are wise shall shine as the brightness of the expanse; and those who turn many to righteousness as the stars forever and ever.”

However it is more interesting than that:

(Genesis 15:5) “Yahweh brought him outside, and said, “Look now toward the sky, and count the stars, if you are able to count them.” He said to Abram, “So will your seed be.””

(Genesis 22:17) “that I will bless you greatly, and I will multiply your seed greatly like the stars of the heavens…”

(Genesis 26:4) “I will multiply your seed as the stars of the sky, and will give to your seed all these planets”

(Exodus 32:13) “Remember Abraham, Isaac, and Israel, your servants, to whom you swore by your own self, and said to them, ‘I will multiply your seed as the stars of the sky, and all this land that I have spoken of I will give to your seed, and they shall inherit it forever.’””

This means that every believer will be transformed into a generation of spirits inheriting his spirit which will together occupy all stars of the universe. Every believer will become a kind of species of spirits of stars. These spirits are called the seed of Abraham. So there will be a descendant of Abraham for every star in the universe.