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The moon is thought to have formed from a disc of debris left when a giant object hit the Earth 4.5 billion years ago, very early in Earth's history. Scientists have long assumed that the heat from an impact of that size would cause hydrogen and other volatile elements to boil off into space, meaning the moon must have started off completely dry. But recently, NASA spacecraft and new research on samples from the Apollo missions have shown that the moon actually has water, both on and beneath its surface. Read more at: phys.org...
The finding is not necessarily inconsistent with the idea that the moon was formed by a giant impact with the early Earth, but presents a problem. If the moon is made from material that came from the Earth, it makes sense that the water in both would share a common source, Saal said. However, there's still the question of how that water was able to survive such a violent collision.
Originally posted by billdadobbie
and there's me thinking that water would explode in a vacume silly old me
Originally posted by Berzerked
Originally posted by billdadobbie
and there's me thinking that water would explode in a vacume silly old me
What does happen to water in a vacuum? Ive never really thought about it until you brought it up
Originally posted by ShadellacZumbrum
reply to post by 727Sky
Wellll, ... . Mathematically speaking it does Not make sense.
As far as the Earth is concerned, it would take something really HUGE to cover 3/4 of the Earths surface with water. Something Really Really HUGE. Keep in mind that an Ice Cube produces very little water when it is melted..
If Anyone can add some supporting evidence to this theory, then by all means please explain.
Originally posted by eriktheawful
Originally posted by Berzerked
Originally posted by billdadobbie
and there's me thinking that water would explode in a vacume silly old me
What does happen to water in a vacuum? Ive never really thought about it until you brought it up
It boils, very quickly and becomes a gas since there is no air pressure, it's boiling temp is very low.
Originally posted by Berzerked
Originally posted by eriktheawful
Originally posted by Berzerked
Originally posted by billdadobbie
and there's me thinking that water would explode in a vacume silly old me
What does happen to water in a vacuum? Ive never really thought about it until you brought it up
It boils, very quickly and becomes a gas since there is no air pressure, it's boiling temp is very low.
Im ignorant in science so I have to ask, why does it boil in a vacuum?
How does water being in a vacuum increase the temp to 212 F to make it boil?
Asteroids from the inner solar system are the most likely source of the majority of Earth's water, a new study suggests.
The results contradict prevailing theories, which hold that most of our planet's water originated in the outer solar system and was delivered by comets or asteroids that coalesced beyond Jupiter's orbit, then migrated inward.
"Our results provide important new constraints for the origin of volatiles in the inner solar system, including the Earth," lead author Conel Alexander, of the Carnegie Institution of Washington, said in a statement. "And they have important implications for the current models of the formation and orbital evolution of the planets and smaller objects in our solar system."
Astronomers have for the first time detected ice and organic compounds on an asteroid, a pair of landmark studies released on Wednesday says.
The discovery bolsters the theory that comets and asteroids crashing into Earth nearly four billion years ago seeded the planet with water and carbon-based molecules, both essential ingredients for life.
Working separately, two teams of scientists using NASA's Infrared Telescope Facility in Hawaii found that the 24 Themis, which orbits the sun between Mars and Jupiter, is literally covered in a thin coating of frost.
It had long been suspected that the massive space rocks that bombarded our planet after the formation of the solar system contained frozen water, but the two studies, published in Nature, provide the first hard evidence.