What will be your answer if asked – water or sun which is the oldest on earth? Research has been going on for some time now and is still ongoing on this matter. Scientists have been working and trying to decipher which is older between water on earth and the sun.
According to the recent research, ‘’up to half the water on Earth may be older than the Sun’’ reported in the journal Science, this will go a long way in helping us settle a debate about when and how our water formed, and offers hope of finding water in other solar systems. One theory is that water formed from ice that condensed out as planets formed in the protoplanetary disk around the Sun 4.6 billion years ago.
As stated in the results of the new findings, led by Ilse Cleeves of the University of Michigan, they suggested that between 30 and 50 % of our water comes from an olden molecular gas and dust cloud that collapsed to form the Sun and solar system.
“Chemistry have also tells us that the Earth obtain a contribution of water from some source that was very cold—only tens of degrees above absolute zero, while the sun being substantially hotter has erased this deuterium, or heavy water, fingerprint,” Bergin said.
In order to start their solar system simulation, the scientists wound back the clock and zeroed out the heavy water. They hit “go” and waited to see if eons of solar system formation could lead to the ratios they see today on Earth and in comets. The researchers talk about what they called Heavy Water.
They referred Heavy Water as water containing a larger than normal amount of deuterium is. “The chemistry tells us that some of Earth’s water was produced under very cold conditions, just tens of degrees above absolute zero [-273°C]. However, the authors found the protoplanetary disk in our solar system wasn’t subjected to high enough levels of ionisation to generate the deuterium to hydrogen ratios seen in our water. “This means protoplanetary disk chemistry is inefficient at producing enough heavy water to explain the amount seen in Earth’s oceans and throughout the solar system today,” says Cleeves.
“So there must be some level of heavy water inheritance in our solar system which predates the Sun.”
According to them, Water is one of the most common substances in the galaxy. It’s found not just on Earth, but throughout the solar system, on icy comets and moons, as permafrost and ice caps on Mars, in mineral samples from meteorites, and in the deep shadowed craters of Mercury and the Moon. The deuterium to hydrogen ratios of water trapped in mineral time capsules inside tiny grains from asteroids and comets have provided scientists with clues about the conditions of the early solar system.
They’ve also shown that Earth’s oceans have a different deuterium to hydrogen ratio than that commonly found in comets, but similar to that found in meteorites.
All life on Earth depends on water. Understanding when and where it came from can help scientists estimate how common water might be throughout the galaxy.