Are We Alone in The Universe? Essay

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Are we alone in the universe? This one is a hard question to answer, but there seems to be an argument that this cannot be so. Firstly, the universe is a huge place, a place that expands every second. It is so big that earth is only a tiny atom in the universe, so we can’t be the only ones alive in all that possibility of space. Secondly, life needs certain things to form; these are called CHNOPS and these are found in other places besides earth. Thirdly, people have reported alien sightings on earth, and this too suggests that we are not alone. Firstly, universe is expanding every second since the birth of the universe. It was first a tiny spec of high concentrated mass and energy, something triggered it to explode. This explosion was…show more content…
This was known as the Drake equation. This equation gave an estimated amount of 200 to 400 billion intelligent civilizations outside earth. Secondly, life is not yet found in other planets. Aliens or extraterrestrial is something that is not from planet earth. So we have to study our own planet to understand how life is formed and what does life need to survive? CHNOPS are 6 elements that life needs to form and survive. CHNOPS stands for Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus and Sulfur. We need water to survive which has hydrogen and oxygen, oxygen to breathe and carbon dioxide for trees and plants to survive. On earth, life can form in very harsh conditions too. Aliens can be ranging from single celled Bacteria to intelligent beings. Life can form in a planet revolving a star or a moon revolving a planet. Astro-biologists predict mars, Jupiter’s moon Europa, Saturn’s moons Titan and Enceladus may have had life or has life on it. Mars has frozen water in its poles and evidence of rivers and streams. Titan has clear evidence of stable bodies of surface liquid and a dense atmosphere. Europa and Enceladus have evidence of water under its icy surface. Enceladus has Cryovolcanos (a volcano that erupts water, ammonia or methane, instead of molten rock) at its south pole which shoots out water vapor and fall back to the surface as snow. Thirdly, during 1900 to 2000 people have claimed sighting of aliens. Two of the famous ones were the

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