Earth is a Goldie locks planet. That term means that we sit far enough from our sun that we don't burn up and have a sustainable atmosphere, liquid water, etc. We are close enough to our sun to not have frozen water... You get the idea. There are other Goldie locks planets in other solar systems. Some of them are like earth in the sense of climate, atmosphere and geographical stability. If your question is more in the existential sense of is there another "us" like multiple dimensions and alternate reality theories, that's a whole other topic and I could write way more than you probably want to read. It's interesting stuff though if you're ever looking to waste time on google.
The Bible doesn't tell us whether or not there is intelligent life on other planets. But if there is life on other planets, then God created that life, for God created everything. As the Bible says, "In the beginning God created the heavens and the earth... Thus the heavens and the earth were completed in all their vast array" (Genesis 1:1; 2:1). Furthermore, if there are beings on other planets that have souls and can know God, then God created them in His image, just as He did us. And you can be sure that He has somehow made it possible for them to know Him. We may never know for sure if there is life on other planets; the distances to other star systems are almost unimaginably vast. It's interesting to speculate about life on other planets. But God is concerned about our lives right now-as we should be.
Earth is the name of this planet. The Hebrew word for Earth, eretz meant fertile soil and came to connote an entire country and eventually the entire world. It is possible that there are other planets that are habitable, though this is not attested to in the Bible. It is possible that the term "new Earth" regarding eschatological events refers to a distant planet that God will take us to before the world is destroyed by fire (nuclear war? super nova?), but we really can't be certain until this happens. It is possible the sun will instead be supernaturally stabilized and the planet we are on now will be supernaturally expanded to fit all resurrected people. But what is important is that there will be a physical place for us to live forever with God that will have universal peace and goodness.
Yes scientists have discovered a new solar system that is too far from here but still pretty far. The star that the planet revolves around is red so that the planet would have to be dangerously close to be a Goldilocks planet but it still contains water and may contain life, however rotation of the planet is locked so it is always night one one side and day on the other side.
Psalm 115:16 says that God gave man Earth. How long for? Ps 37:29. Besides there is nothing wrong with the present earth. Just the inhabitants ruining it. Rev 11: 18. Remove the real problem and earth will be fine. 1 Joh 5:19, Ps 37: 10,11, Rom 16:20.
I don't think there is because God created us for relationship with Him and sent Jesus to earth to bridge the gap between man and God and then said that there is no way to the father except through the Son Jesus. Jesus came to Earth so that we can have direct relationship with God. There is no mention of Jesus going to another planet for mankind to have redemption/relationship with God. Jesus lived 33 years, died and rose again then after taking the keys from hell, sat at the right hand of the Father, he never deviated to another planet.