Sentences with phrase «carbonaceous chondrites»

The water found on the moon, like that on Earth, came from small meteorites called carbonaceous chondrites in the first 100 million years or so after the solar system formed, researchers from Brown and Case Western Reserve universities and Carnegie Institution of Washington have found.

It appears similar to a group of asteroids known as carbonaceous chondrites.

My research has focused on characterizing the soluble and insoluble organic materials of carbonaceous chondrite meteorites with the aim to trace their abiotic origins in Solar and / or pre-Solar extraterrestrial environments.

Or, the proto - moon and proto - Earth were showered by the same family of carbonaceous chondrites soon after they separated, said James Van Orman, professor of earth, environmental and planetary sciences at Case Western Reserve, and a co-author.

Two possible ways that the inner solar system received water are: water molecules sticking to dust grains inside the «snow line» (as shown in the inset) and carbonaceous chondrite material flung into the inner solar system by the effect of gravity from protoJupiter.

Here, meteoriticist Laurence Garvie holds a large piece of a famous carbonaceous chondrite known as Murray, which fell in Kentucky in 1950.

In 2012, Alexander and colleagues concluded in the journal Science that the bulk of Earth's water arrived via bodies similar to a class of meteorites known as CI carbonaceous chondrites.

Based on data obtained with the Gamma Ray and Neutron Detector aboard the Dawn spacecraft, Prettyman et al. (p. 242, published online 20 September) show that Vesta's reputed volatile - poor regolith contains substantial amounts of hydrogen delivered by carbonaceous chondrite impactors.

The study's authors knew the ratio for carbonaceous chondrites and reasoned that if they could compare that to an object that was known to crystallize while Earth was actively accreting then they could gauge when water appeared on Earth.

«The results confirm one of the basic ideas of planetary formation theory, that most of the Earth formed by collisions of smaller objects like carbonaceous chondrites,» says Scott Kenyon at the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts.

Some of that water was contained as ice in primitive meteorites called carbonaceous chondrites.

Scientists have speculated that a rain of carbonaceous chondrites may have seeded early Earth with the raw material for biology here.

The investigators found that the deuterium / hydrogen ratio in the melt inclusions was relatively low and matched the ratio found in carbonaceous chondrites.

Krypton in today's atmosphere is somewhat heavier than solar krypton, and the krypton embedded in meteorites known as carbonaceous chondrites is even heavier than that.

Carbonaceous chondrite meteorites contain vital clues to the evolution of carbon compounds in our solar system preceding the origin of life.

This abundance is lower than model estimates of ultraviolet (UV) degradation of accreted interplanetary dust particles (IDP's) or carbonaceous chondrite material.

One type, called carbonaceous chondrites, includes some of the most - primitive known samples.

Instead, he found that, in one meteorite type, called carbonaceous chondrites, the isotope levels were starkly different from other types.

But carbonaceous chondrites are known to have formed later than other meteorites — so it was possible that their peculiar isotopic chemistry reflected changes over time in the disk, rather than a distinct place of origin.

Like a chemical fingerprint, the isotopic ratio between Earth's samples and the carbonaceous chondrites» samples matched.

Water and other volatile elements arrived on Earth via meteorites called carbonaceous chondrites.

McCord's grad students set to work on the data and came up with some preliminary findings: Ceres was a carbonaceous chondrite (a type of asteroid composed of water locked in minerals and carbon - based materials), and it had not been thermally altered.

Though the cometary region is now ruled out, the exact birthplace of the carbonaceous chondrites is far from certain, says Fred Ciesla, a researcher at the University of Chicago.

Most knowledge about the first solid bodies in the solar system comes from meteorites called carbonaceous chondrites, thought to be chunks of the first asteroids.

On his desk at ASU are some polished slices of NWA 6991, a speckled, black stone known as a carbonaceous chondrite: the most primitive type of meteorite containing some of the first material from the solar system's youth.

In 2013, Saal and colleagues reported in Science that the D / H ratio of water trapped within the glass matched that measured in both Earth's oceans and Alexander's carbonaceous chondrites (SN: 6/29/13, p. 8).

Early accretion of water in the inner solar system from a carbonaceous chondrite - like source.

For one, the new data throw a wrench in the conventional story that carbonaceous chondrites — a water - rich variety of asteroid — delivered water to an initially dry Earth after its formation.

«The carbonaceous chondrites don't really work.»

Deimos is composed of rock rich in carbonaceous material, much like C - type asteroids and carbonaceous chondrite meteorites.

Saal and his colleagues found that the deuterium / hydrogen ratio in the melt inclusions was relatively low and matched the ratio found in carbonaceous chondrites, meteorites originating in the asteroid belt near Jupiter and thought to be among the oldest objects in the solar system.

Researchers have analyzed carbon - rich meteorites (carbonaceous chondrites) and found amino acids, which are used to make proteins.

Meteorites such as these carbonaceous chondrites are thought to have delivered water to the Earth — but an outstanding question is when.

The most primitive known meteorites, carbonaceous chondrites, were formed in the same swirl of dust, grit, ice and gasses that gave rise to the sun some 4.6 billion years ago, well before the planets were formed.

That, combined with nitrogen isotope data, points to carbonaceous chondrites as the most likely common source of water.

The measurements show that 4 - Vesta contains the same hydrogen isotopic composition as carbonaceous chondrites, which is also that of Earth.

The study's authors turned to another potential source of Earth's water — carbonaceous chondrites.

In gas with extra carbon or too little oxygen, carbon compounds like carbides and graphite condense out instead of silicates, possibly explaining the origin of carbonaceous chondrites and suggesting the possibility of carbon planets.

«Carbon planets could form in much the same way as do certain meteorites in our solar system, the carbonaceous chondrites,» said Dr. Marc J. Kuchner of Princeton University, making the report in Aspen together with Dr. Sara Seager of the Carnegie Institute of Washington.

Specifically, they focused on the spectra, or chemical fingerprints, of carbonaceous chondrites, a type of carbon - rich meteorite thought to be relevant analogues for the dwarf planet.

The scientists note another difference is that these carbonaceous chondrites have bulk water contents of 15 to 20 percent, while Ceres» content is as much as 30 percent.

One type, called carbonaceous chondrites, contain some of the most - primitive known samples of Solar System material, including a lot more xenon than is found in our own planet's atmosphere.