Your words: "The verse does not say that the disciples saw a body go up. It was the Christ Spirit that ascended, not a body..."
I decided to write another interpretation of Acts 1:9-11 since I changed my mind about what I believe the two men dressed in white actually saw going up.
Acts 1:9 After he said this, he was taken up before their very eyes, and a cloud hid him from their sight. 10 They were looking intently up into the sky as he was going, when suddenly two men dressed in white stood beside them. 11 “Men of Galilee,” they said, “why do you stand here looking into the sky? This same Jesus, who has been taken from you into heaven, will come back in the same way you have seen him go into heaven.”
The disciples (Men of Galilee) were staring up into the sky. The two men dressed in white (angels) came along and asked why they were staring up into the sky. The two men dressed in white (angels) then wondered why the disciples were staring up into the sky, and then they said that
the same Jesus who was taken up to heaven will return as he went to heaven. The text does not say what the disciples saw going up to heaven, but presumably it was the spiritual body of Jesus, the body that Jesus had after he died physically and was resurrected (transformed).
1 Corinthians 15: 51 But let me reveal to you a wonderful secret. We will not all die, but we will all be transformed!
The angels said:
This same Jesus, who has been taken from you into heaven, will come back in the same way you have seen him go into heaven
That is not a reason to believe that the same Jesus will return as He ascended since angels carry no authority. Moreover, if it was the spiritual body of Jesus that ascended, that body would not come back to earth since spiritual bodies were made for heaven, not for earth.
Moreover, Christians claim that the Son of man sitting on the right hand of power, and coming in the clouds of heaven will be Jesus. but all the verses referring to the Son of man appearing say that
we will see Him.
Mark 14:62 And Jesus said, I am: and ye shall see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.
Matthew 24:30 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
Matthew 26:64 Jesus saith unto him, Thou hast said: nevertheless I say unto you, Hereafter shall ye see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.
Mark 13:26 And then shall they see the Son of man coming in the clouds with great power and glory.
Matthew 24:30-31 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory. And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
Revelation 1:7 Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.
The problem is that spiritual bodies cannot be
seen by ordinary people, and that is why the disciples were staring up into the sky and had to be told by the angels that it was the spiritual body of Jesus going up to heaven. So, if Jesus returned to earth in a spiritual body nobody would be able to see Him. The invisible Jesus. What would be the point?