Christ did not enter a sanctuary made by human hands, a mere copy of the true one, but he entered into heaven itself, now to appear in the presence of God on our behalf. (Hebrews 9.24)
Heaven is… well, somewhere beyond where we are now, a dream picture, a vision maybe of the very best of the not-perfect life we know. The natural association was with the heavens above, until the science became clear, but never seriously as anything other than a way of locating the hoped-for and unknown. In the Bible we find alternative pictures of heaven - Paradise, the perfect garden, or a golden city, the new Jerusalem. Whatever heaven we might be longing for, whatever our present earth-bound situation, we can trust that God – Father, Son, Holy Spirit – is 100% there and here, with us. "Lift up your hearts"!