For thousands of years mankind has looked up at the moon and the stars and wondered if there are other habitable zones out there. While our planet system provides ideal human living conditions, no one knows for sure if earth is the only planet with life.
The night sky
Once the sun goes down, many people enjoy gazing at the night sky, sometimes with the aid of a telescope. Depending on whether you live in the city or a rural area, between 2,000 and 6,000 stars are visible to the naked eye. Scientists, astronomers, and private citizens all speculate over the theory that because there are so many stars that are visible from Earth, what about the ones we can’t see and that are outside our planet system? Life might exist on other planets, but we can’t prove it.
A breakdown of space
The size of the universe makes proof difficult to obtain.
Add it all up, and there are trillions of stars. Many of them could be similar to earth.
Life on earth
Whether or not there are other life forms in the universe is unknown to scientists. What they do know is that of all the habitable zones, our planet system has ideal living conditions for humans.
While the human race might not exist outside of Earth’s planetary system, that doesn’t mean that there are no other habitable zones for other life forms. Not only the volume, but the sheer size of a number of stars and planets, are enough to create doubt. Jupiter, for instance, is the largest planet in our solar system and is estimated to be 1,321 times bigger than Earth. Magnetic readings from the Galileo satellite suggest that one of Jupiter’s 17 moons, Europa, might have an ocean of liquid water covered by ice.
When you gaze up at the sky or browse images from space online, it’s hard to imagine that earth is the only planet with life. If it is, then what is the purpose of all the other trillions of stars that exist beyond our planet system?