Studies in Genesis 1
In the beginning, God created the heavens and the earth. [Genesis 1:1 ESV]
Look into the night sky, on a clear night and far removed from the ambient light of civilization, and you will see thousands of stars, maybe a few of the near planets and possibly the Andromeda galaxy. You may even see the Milky Way, the galaxy in which the Earth is placed.
It does not take much imagination to realize how small the Earth is in relation to the rest of the universe. Yet, I think few contemplate the size of our planet or the size of themselves on our planet. People are unique, built with an awareness of self which tends toward self-absorption, which places self at the center, unaware of anyone who does not exist within a small circle of influence.
When God created the universe He deliberately placed the Earth in its precise location. Relative to the rest of the universe the Earth is smaller than a speck of dust. Stars have been seen which are so large they would hold an estimated 70 quadrillion planets the size of the Earth.
There are 15 zeros behind the 70 (70,000,000,000,000,000).
Considering the size of the universe and the fact of life on Earth many speculate there are other planets in other solar systems, inconceivably far away, which support life. This is pure speculation. An imaginative science fiction grows from this speculation.
We know about the Earth. Life on Earth is not speculation but a reality. God designed and created the Earth for human life.