The Bible does not give any geographical location to heaven. The heaven is where God resides in his absolute perfection. The Bible says “who alone has immortality, who dwells in unapproachable light, whom no one has ever seen or can see. To him be honor and eternal dominion. Amen." (1 Timothy 6:16, ESV)”.
We then will not reach God nor heaven through any space exploration programs nor through our minds.

He himself has stepped out from his hidden magnificence and revealed to us, what we need to know about heaven. The Bible—especially the Revelation—has many depictions concerning heaven. These depictions cannot be fitted into one nice picture. How would a cube-like city full of golden streets look like? Or how would a never-ending, always renewing, hallowed worship look like? What about a garden, whose beauty is such that nothing compares to it? What is it that God Himself dries our tears? The old teachers of the Church have spoken of heaven as "God's blissful viewing '. - At least for me this is already enough reasons to want to get to see it all!

And I heard a loud voice from the throne saying, “Behold, the dwelling place of God is with man. He will dwell with them, and they will be his people, and God himself will be with them as their God.
(Revelation 21:3, ESV)