Sentences with phrase «water than asteroids»

Not exact matches

However, the Rosina mass spectrometer aboard Rosetta found that the ratio of deuterium to hydrogen in the comet is far greater than that found on Earth, adding to the growing body of evidence that the water on Earth was delivered not by comets, as previously thought, but by asteroids.

The meteorite, dubbed Northwest Africa (NWA) 7034, contains a concentration of water by weight about ten times higher than in any of the other 100 or so known Martian meteorites — those rare rocks that get ejected from the Martian surface into space when an asteroid hits the planet, and eventually find their way to Earth.

Among other things, GRACE may have found a crater deep under the Antarctic ice that may mark an asteroid impact greater than the one that doomed the dinosaurs, measured the seafloor displacement that triggered the tsunami of 2004, and quantified changes in subsurface water in the Amazon and Congo river basins.

There are many white dwarfs that hold large amounts of hydrogen in their atmospheres, and this new study suggests that this is evidence that water - rich asteroids or comets are common around other stars than the Sun.»

Commenting on the findings lead researcher Dr Roberto Raddi, of the University of Warwick's Astronomy and Astrophysics Group, said: «Our research has found that, rather than being unique, water - rich asteroids similar to those found in our Solar System appear to be frequent.

Another group has conducted experiments suggesting that the water at these depths was formed on Earth rather than being delivered by comets and asteroids.

As expected, the simulations showed that the larger, 1 - km asteroid created the bigger splash, throwing 42 trillion kilograms of water and vapour — enough to fill 16 million Olympic - sized swimming pools — across an area more than 1000 kilometres wide and up to hundreds of kilometres above the Earth's surface.

If comets provided even just 1 % of Earth's water, our atmosphere should have much more argon than it does.c Meteorites that contain water also have too much heavy hydrogen.d [Pages 305 — 382 explain why comets, asteroids, and some types of meteorites contain so much water and heavy hydrogen.

In addition to rocky asteroids and icier bodies further out from the Sun, many agglomerated into larger planetesimals that eventually collided to form planets like the Earth, and more than 250 minerals, including olivine and zircon, developed within the planetesimals with the help of melting, collisional shocks, and reactions with water.

Ya know, since there's clearly a need for working raw materials in near Earth orbit, and we're not going to catch an asteroid any time soon — perhaps it would be worth putting some loads of say water ice, or sheet metal, or nitrogen tanks, or something cheaper than a satellite, and making some test shots of this vehicle until they know for sure the fairing will pop off.