help me correct it.Thank you
Last time we talk about the works of particle physicists. And today, we`ll put our eyes on the query: where the Earth`s water come from. There`re tons of theories trying to answer it. One of them explained that the Earth`s water comes from the outer space. It is brought to our planet by comet. And now, hints of this theory emerged and strongly add credence to this idea.
For the first time, astronomers have found a planet-forming disc around a star that is awash with frozen water. The new observations are of water in the form of ice grain, which can exist only in the frigid outer reaches of a planet-forming disc. It is there that they can ultimately coalesce into planets and comets. Earlier observations had found organic materials like carbon monoxide and cyanide in such discs, but because Earth`s own atmosphere is so damp, it interferes with the detection of alien water from the ground.
To solve this problem, Michiel Hogerheijde of the Leiden Observatory in the Netherlands and colleagues used the space observatory to get above Earth`s clouds and find a spectral signature that can be attributed to ice reservoirs about five one-thousandths of the mass of Earth`s oceans. But for every gram of vapour they spotted directly, there should be thousands of grams still frozen. The team inferred that the total ice reservoir in the disc should be amount to several thousands of Earth`s hydrosphere.
They further confirmed that the water they were seeing came from the frigid, comet-forming region of the disc via the signatures of two different types of water molecule, which form at different temperatures. The ratio of these two versions of water in the disc suggested that much of it formed the frigid outer regions of the disc.
The discovery of cold water around this forming planet suggests that the Earth got its oceans from comets is a distinct possibility. And that even could be good news for the prospect of life on dry exoplanet that are waiting for water.
So how do you think about that? Don`t care about it hah? Same here!
So this is today`s Iming Talk, thank you for listening, see ya
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