As we all know that we are a part of Milky Way, but we actually unknown about the details about our solar system. To make our eyes bulge, the fact is that our Milky Way galaxy may house 100 million other planets that could support complex life, as per the new studies.
To examine data from planets orbiting other stars in the universe the researchers developed a new computation method which provides the first quantitative estimate of the number of worlds in our galaxy that could harbour life above the microbial level.
Researchers said, "This study does not indicate that complex life exists on that many planets. We're saying that there are planetary conditions that could support it. Origin of life questions are not addressed - only the conditions to support life."
"Complex life doesn't mean intelligent life - though it doesn't rule it out or even animal life - but simply that organisms larger and more complex than microbes could exist in a number of different forms. For example, organisms that form stable food webs like those found in ecosystems on Earth," they cleared.
For the study, the researchers surveyed more than 1,000 planets and used a formula that considers planet density, temperature, substrate (liquid, solid or gas), chemistry, distance from its central star and age. According to the pieces of information they developed and computed the Biological Complexity Index (BCI).
As per the BCI calculation, 1 to 2 per cent of the planets showed a BCI rating higher than Europa -a moon of Jupiter thought to have a subsurface global ocean that may harbour forms of life.
According to Cornell Chronicle, the BCI yields 100 million plausible planets with about 10 billion stars in the Milky Way galaxy
The Milky Way is so vast that planets with high BCI values are very far apart, despite the large number of planets that could harbour complex life , according to the scientists.
Gliese 581 is the closest and most promising extrasolar systems which has two planets with the apparent, possible capacity to host complex biospheres and the distance from Earth to Gliese 581 is about 20 light years.
"It seems highly unlikely that we are alone. We are likely so far away from life at our level of complexity that a meeting with such alien forms might be improbable for the foreseeable future," researchers said.
The research and study authors included Alberto Fairen, Cornell research associate; Louis Irwin, University of Texas at El Paso (lead author); Abel Mendez, University of Puerto Rico at Arecibo; and Dirk Schulze-Makuch, Washington State University.