A Universe of Blue Dots? –“Water Common During the Formation of All Planetary Systems”
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The new SciFi blockbuster, Interstellar, shows astonauts from post apocalyptic earth, destroyed by what appears to be a modern dust-bowl, catapulted into the unknown of outer space in the hopes of finding a new home for the human race, only to discover an extraterrestrial tidal wave on a distant exo planet. How realistic is the premise of an alien water planet? New findings suggest it’s based on solid science.
“This is an important step forward in our quest to find out if life exists on other planets,” said Tim Harries, from the University of Exeter’s Physics and Astronomy department, who was part of the research team. “We know that water is vital for the evolution of life on Earth, but it was possible that the Earth’s water originated in the specific conditions of the early solar system, and that those circumstances might occur infrequently elsewhere. By identifying the ancient heritage of Earth’s water, we can see that the way in which our solar system was formed will not be unique, and that exoplanets will form in environments with abundant water. Consequently, it raises the possibility that some exoplanets could house the right conditions, and water resources, for life to evolve.”
The implication of these findings is that some of the solar system’s water must have been inherited from the Sun’s birth environment, and thus predate the Sun itself. If our solar system’s formation was typical, this implies that water is a common ingredient during the formation of all planetary systems.
To date, the Kepler satellite has detected nearly 1,000 confirmed extrasolar planets. The widespread availability of water during the planet-formation process puts a promising outlook on the prevalence of life throughout the galaxy.
A pioneering new study has shown that water found on Earth predates the formation of the Sun – raising hopes that life could exist on exoplanets, the planets orbiting other stars in our galaxy. The ground-breaking research set out to discover the origin of the water that was deposited on the Earth as it formed.
It found that a significant fraction of water found on Earth, and across our solar system, predates the formation of the Sun. By showing that water is ‘inherited’ from the environment when a star is born, the international team of scientists believe other exoplanetary systems also had access to an abundance of water during their own formation.
As water is a key component for the development of life on Earth, the study has important implications for the potential for life elsewhere in the galaxy.
Scientists have previously been able to understand the conditions present when stars are formed by looking at the composition of comets and asteroids, which show which gases, dust and, most importantly, ices were circling the star at its birth.
The team of international scientists were able to use ‘heavy water’ ices – those with an excess of water made with the element deuterium rather than hydrogen – to determine whether the water ices formed before, or during, the solar system’s formation.
Source :daily galaxy