The whole process is not entirely understood nor has it ever been observed of course. It is not as easy as it may sound reading internet articles on star formation and it is entirely based on the presumption that stars can form by natural processes of nature. Personally, I’m not so sure that stars can form by natural processes of nature. However, if it is possible and essentially involves according to the prevailing theory the gathering together of at least a minimum quantity of hydrogen atoms which by the force of gravity eventually forms into a star, than it is no problem for an angel to do this by moving certain quantities of atoms around and controlling other factors and forces involved.
Natural processes of nature or an angel is not ‘creating’ a star in the technical sense of creating which can only be done by God. The angel is simply utilizing or organizing and moving around (the elemental atoms) what has already been created by God. Again, I’m not sure that such natural processes and simply a minimum quantity of hydrogen atoms is all that is necessary for stars to form. It may be that there are unknown hidden forces of nature besides those forces already known that prevent a quantity of hydrogen atoms collapsing into a star and sort of balances out the force of gravity and which can only be overcome by God or possibly by an angel.
The angels are involved in the natural forces and processes of nature and cause various phenomena by utilizing them like instruments according to God’s providential ordinances as we find in many passages of the Bible. For example, in Hebrews 1:7:
Of the angels he says,
“Who makes his angels winds,
and his servants flames of fire.”
This verse is an allusion to Psalm 104:4:
who makest the winds thy messengers,
fire and flame thy ministers.
The messengers and ministers here are the angels of Hebrews 1:7 who cause winds and fire and flame probably refers to lightening.
Just before Psalm 104, Psalm 103: 20-21 says:
Bless the Lord, O you his angels,
you mighty ones who do his word,
hearkening to the voice of his word!
Bless the Lord, all his hosts,
his ministers that do his will!
Consider the angels who do his word and his ministers (angels) that do his will with the command and word of Psalm 147: 15-18:
He sends forth his command to the earth;
his word runs swiftly.
He gives snow like wool;
he scatters hoarfrost like ashes.
He casts forth his ice like morsels;
who can stand before his cold?
He sends forth his word, and melts them;
he makes his wind blow, and the waters flow.
Consider the works God permits Satan to do to Job’s family. The angels are involved in quite a few of the works in the book of Revelation. In 7:1, there are four angels who hold back the four winds of the earth. There is an angel in charge of the waters in 16:5. Jesus permits the demons he exorcised from a person to go into the swine and they go headlong into the sea.