Sentences with phrase «not by comets»

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.

Not exact matches

For theology, clinging desperately to the supernatural as its only way of keeping God, had fought against one realm of law after another, even fighting the law of gravitation, until, beaten everywhere else, it was left with comets as about the only things that had not been captured by law.

P.S, Pep in his pre game comet gave us a huge compliment by saying that Arsenal is probably the best and most deadliest team to counter attack «in the world», make what you will of that but i say its not constant,

The comet hasn't returned and may be on a parabolic orbit, in which case it won't pass by Earth again.

A dynamic simulation of that process, carried out by A'Hearn's colleague Kevin Walsh of Southwest Research Institute, sheds light on many long - standing puzzles about the solar system: not only where the Oort Cloud comets come from, but also why Mars is so small and airless com - pared with Earth.

If sunlight must penetrate the dust covering a comet's water ice in order to warm it and produce jets, Sunshine says the Deep Impact findings suggest the ices on such dormant comets may not have run out but merely become sealed — by layers of debris, for example.

But the plumes spotted by Herschel seemed to come from nearer the equator, which implies they can't be comet - like.

But a model of Ceres presented at the LPSC has added a wrinkle by suggesting comet - like behaviour is only possible at the poles of the dwarf planet, not the lower - latitude areas where the bright spot has been seen.

By 2015, other research teams had announced that the «Hypatia» stone was not part of any known types of meteorite or comet, based on noble gas and nuclear probe analyses.

Scientists think the magnesium, and possibly other metals not yet detected, comes from cosmic dust left by passing comets.

Prematurely billed by the tabloids as the «killer comet» about to strike Earth, Hale - Bopp is fortunately not on a collision course with us.

«We're not sure whether these stars are holding onto reservoirs of gas much longer than expected, or whether there's a sort of «last gasp» of second - generation gas produced by collisions of comets or evaporation from the icy mantles of dust grains,» said Meredith Hughes, an astronomer at Wesleyan University and coauthor of the study.

But comet slaughter isn't the only explanation, according to a second team led by Christina Thöne of the Institute of Astrophysics of Andalusia in Granada, Spain.

The comet, which is now about one - millionth as bright as the faintest star visible with the naked eye, can't be discerned in wide - field images taken by Rosetta's instruments.

They also looked at whether craters made by the comets hitting the surface could excavate enough nitrogen — but that would require a very deep layer of nitrogen ice at the surface, which is not proven.

But observations do not match theory: By one estimate, the Oort Cloud contains some 700 times as many comets as the scattered disk.

The finding is «exciting,» says astrobiologist Lynn Rothschild of NASA's Ames Research Center in Moffett Field, California, who was not involved in the work, because it indicates that nano - suited creatures might survive travel by a meteorite or comet through the extreme environments of space.

These moons» exact orbits aren't yet known because they have been observed for such a short time, so official recognition and naming by the Minor Planet Center (the clearinghouse for information on moons, comets, etc.) must wait until the moons are spotted again this fall.

The Deep Impact team were not only delighted by the success of the impact, but also by the survival of the flyby spacecraft after it was spattered by debris from the comet's tail, or coma.

By itself, this wouldn't be too surprising, because carbon monoxide escapes into space easily when the Sun warms a comet.

In case you haven't heard by now, a comet is basically a big ball of dirt and ice flying through our solar system.

It did not look like a comet either, appearing under telescopic scrutiny to be shaped like a half - kilometer - long needle — a form unknown among natural solar system objects but often favored by starships in science fiction.

Early moon geology recreated in the lab suggests water was there to begin with, not added later by comets

My point here is we are entering a current of thinking, developed by a few scientists all over the world, reconsidering the time of humans in terms of multiple comet impacts, not all of them yet known.

This idea might be considered esoteric were it not for the fact that there are reasons to think that just such a hierarchical disintegration by a very large comet had occurred within the past 20 - 30 kyr, the largest remnant being Comet Encke.

When it comes to life on Earth, we're not sure if it came from the outside (transported by comets) or on the inside.

The global science community still isn't entirely sure what caused the repeated cycles — there may have been larger oceans in the northern hemisphere that powered a hydrological cycle (evaporation, condensation, precipitation), or shorter cycles could've been caused by volcanic activity or asteroid / comet impacts.

But a new study suggests it wasn't aliens at all — but rather a hydrogen cloud caused by comets.

Especially important is the study of cometary «parent molecules» — molecules which have been present since the comet's birth, but have not been disturbed by chemical processing.

Given that Tau Ceti does not appear to be a young star, the ring of dusty debris is believed to be produced by collisions between larger comets and asteroids that break them down into smaller and smaller pieces, and Tau Ceti's disk is similar in size and shape to the disk of comets and asteroids that orbits the Sun, Sol.

Sandblasted by interstellar dust gains and irradiated over eons, long - period comets from the Oort Cloud are not exactly pristine relics from the birth of the Solar System (more).

While the comet will not collide with the sun, most astronomers say the odds are rather long that it will remain intact after its closest pass by the sun.

Angie Olami has created a beautiful necklace inspired by the famous comet that you don't have to wait another 76 years for, but is just as rare of a sighting!

The Bottom Line: Also out in 1998 (a good example of Hollywood's dueling movie - idea mentality), this one directed by Mimi Leder (THE PEACEKEEPER) is actually a deadly comet that can not be stopped.

But perhaps what we all appreciate most about that car is how, like a comet leaving a streak of gleaming dust in its wake, it blazed the trail for the M2, which considerably more customers will be able to enjoy — something that has not been mentioned enough by the enthusiast media.

I actually don't know if I'm allowed to pick an expansion, and I know PUBG is actually going to win, but for me it's XCOM 2's War of the Chosen expansion by the length of a comet's tail.

In addition, there is a smaller crater at Tilted Towers, which despite the predictions of many players were not completely obliterating by the comet.

Furthermore, this was not measured on a beer crate in someones back - yard, but on the historic Windsor Observatory which was built in 1863 by John Tebbutt F.R.A.S who had discovered The 1861 comet, and published many scientific reports in Astronomical Journals.

No, lack of evidence isn't evidence on the pro - comet / asteroid side either... However, a nanon - diamond - bearing layer in the right place is rather good evidence itself unless one can come up w / a way for gradual, common sedimentological process to concentrate nano - diamonds in certain layers by chance immediately at an extinction & abrupt climate - change horizon.

If it turned out that rapid climate change events are caused by comets, it would imply the climate system is far more stable than we thought, that abrupt climate change events are not part of the inherent variability of climate during glacial periods.

We emphasize that we are not saying «the Younger Dryas can't have been caused by a comet, unless all the Dansgaard - Oeschger events were caused by comets».

And by «well» I mean, not getting bombarded by comets and poisonous monkeys.