No, you can't see heaven with a telescope, because heaven exists beyond anything we can see. In fact, it apparently exists in a dimension entirely different from anything we know.
But that doesn't mean heaven isn't real–not at all. In fact, the Bible tells us that some day all the things we see around us (including the stars and galaxies in space) will pass away–but heaven will remain. In other words, heaven is even more "real" than the earth and the stars. The Bible says, "The heavens (that is, the planets and stars) will disappear with a roar" (2 Peter 3:10).
The most important thing I want you to know about heaven is that we will be with God. You and I can barely imagine what that will be like, because it will be far greater than anything we will experience on earth. Down here, things sometimes go wrong–but everything will be perfect in heaven, because God is perfect. Down here, bad things can happen–but no evil will ever touch us in heaven, because we will be with God.
The other important thing I want you to know is that Jesus has opened heaven's door for us. He said, "I am the door: by me if any man enter in, he shall be saved" (John 10:9 KJV). We don't deserve to go to heaven, but Jesus made it possible, and now He invites us to follow Him to our heavenly home. Ask Jesus to come into your life, and some day you too will join Him in heaven.