Sentences with phrase «of rockier bodies»

Astronomers have long suspected that the young, 12 - million - year - old star hosts a massive planet, since it is surrounded by a dusty disc of debris thought to be created by the collision of rocky bodies and infalling comets.

In the prevailing theory of planet formation, called core accretion, dust grains stick together to form rocky worlds, and some of these rocky bodies then grow massive enough to attract surrounding gas, becoming gas giants like Jupiter.

Not exact matches

Some of my clients innocently entered into the world of dieting, only to find themselves years and years later, with a continually confusing and rocky relationship with both food and their bodies.

These bodies, along with Pluto, are members of the Kuiper Belt, a population of rocky potential comets orbiting beyond Neptune.

These «debris disks» are constantly fed by collisions among rocky bodies — the larger of which can survive and grow by continued accretion — because the tiny dust grains quickly fall onto the central star or get blown out of the planetary system.

An infrared telescope has revealed fresh clouds of dust from gigantic smashups between rocky bodies, signs that planet - building and destruction take longer and are more violent than astronomers had assumed.

As the years rolled by the planet was losing the fire of its youth, but it was also slimming down, shedding a few pesky kilometres from its round, rocky body.

Astrophysicist Alan Boss of the Carnegie Institution of Washington thinks this structural similarity gives a reason to suspect that these planets, too, are rocky bodies that formed much the way Earth did.

The other suggests they arose in a two - stage process called core accretion, in which bits of material smashed and fused together to form bigger rocky, icy bodies.

Until recently, that rule led scientists to think only in terms of places just like home: temperate, rocky planets with bodies of liquid water on their surfaces.

Researchers report that decreasing water pH — one consequence of rising levels of carbon dioxide in the atmosphere — dissolves the stony coral's hard skeleton but does not dislodge the soft - bodied polyps from their rocky substrate.

If there's gas around and the bodies get large enough, perhaps something on the order of 10 Earth masses or so, then you can start pulling some gas in on top of your rocky core and make something that looks like a gas giant planet, like Jupiter.

The seeming abundance of rocky super-Earths lends support to the core accretion model of planet formation, in which small rocky bodies collide and clump together to grow into these objects.

With a diameter of about 1,215 km, the France - sized moon is one of largest known objects in the Kuiper Belt, the region of icy, rocky bodies beyond Neptune.

Indeed, the present - day theory of planet formation — the build up of a rocky planet's core by the accretion of many small bodies — is very different from Jeans's.

The presence of this rock at a site indicates either that material has pushed up through Earth's crust from the mantle (a silicate rocky shell between the crust and the core with an average thickness of 2,886 km and depths ranging from 30 km to almost 3,000 km below the crust) or that a celestial body (a comet, meteor or meteorite) fell there.

Even though many of the planets orbit their stars very closely and have high temperatures, which in turn causes their hydrogen - rich atmospheres to expand and a fraction of the gases to escape the planet over time, it's unlikely that the planets will lose enough of their atmosphere to become rocky bodies like Earth, the researchers report online today in the Monthly Notices of the Royal Astronomical Society.

The rocky body — the largest yet to get a close flyby — seems to have been just large enough to avoid being reduced to a flying pile of rubble by eons of collisions with other asteroids.

Last year, rival European and U.S. teams used sensitive new measurements to discover three hot worlds roughly the size of Neptune (ScienceNOW, 31 August 2004:), which theorists regarded as plausible rocky bodies.

Analysis of 166 stars found almost a quarter — much more than expected — had small, rocky planets, which should force a change in thinking on the overall frequency of such bodies.

At the moment, the team's favored idea is akin to the second solution above: that large bodies of solid metal slowly dropped from the rocky mantle and into the core to lower the nucleation barrier.

Recent collisions between comets and rocky bodies within the star system are thought to have generated the surplus of dust.

Previous research showed Eureka is rich the mineral olivine, which forms in the mantles of large rocky bodies but is rare in asteroids.

That heat led to the separation of the primordial body into a rocky crust, an underlying rocky mantle, and a central metallic core, hallmarks of planet Earth and the other rocky planets.

The find is reminiscent of the solar system's earliest days, when most large, rocky bodies sported a magma ocean until they cooled down.

Researchers haven't yet confirmed the idea, but further studies should produce new clues about the composition and behavior of these tiny rocky bodies — information that someday could help prevent a catastrophic collision with Earth.

In the past, the decay of radioactive elements and the leftover heat from Titan's formation might have melted nearly all the body's ice — so the ocean might have extended all the way down to the rocky core.

As impact glass is a ubiquitous substrate on rocky bodies throughout the Solar System and likely common on the early Earth, the preservation of biological activity in impact glass has significant astrobiological implications for life on early Earth as well as for the search for life on other planets.

Such an intriguing metallic planetary body has not been studied before by any spacecraft; other asteroids visited have been of the rocky variety.

Comets, those icy and rocky bodies with the spectacular long tails of gas and dust, are common in our Solar System, with several thousand having been discovered so far.

To get a better sense of the role of chondrules in a fledgling solar system, the researchers first simulated collisions between protoplanets — rocky bodies between the size of an asteroid and the moon.

This is the first time a white dwarf with nitrogen has been discovered, and one of only a few known examples of white dwarfs that have been impacted by a rocky body that was rich in water ice.

nucleus (in astronomy) The rocky body of a comet, sometimes carrying a jacket of ice or frozen gases.

In 2006, with the discovery of several other rocky bodies similar in size or larger than Pluto, the IAU decided to re-classify Pluto as a dwarf planet.

A speck of light spotted in October 2015 is a rocky world more than 3 times more distant than Pluto — the farthest body in our solar system ever seen.

Calcium - carbonate is attractive as a mineral constituent of this planet - like body as incorporating and entraining carbon in rocky objects (especially their surfaces) is difficult.

Similarly, the terms Neptunes and hot Neptunes refer to planets less than about 10 percent of Jupiter's mass, and the term super-Earths refers to those planets that may well be rocky bodies only a few times as massive as Earth.

If the dust trap is formed in the disk, earth - like rocky planets, small bodies such as comets, or cores of gaseous planets may be formed.

Both objects formed among the rocky and icy protoplanets beyond the Solar System's «ice line» now located around 2.7 AUs, but the early development of Jupiter apparently prevented such large protoplanets between the gas giant and planet Mars from agglomerating into even bigger planetary bodies, by sweeping many into pulverizing collisions as well as slinging them into the Sun or Oort Cloud, or even beyond Sol's gravitational reach altogether.

But what mechanism could have raised the temperatures of the asteroids to this extent if the rocky bodies were too small to retain the heat from long - lived radioisotopes?»

Abstract: [Abridged] Debris discs around main - sequence stars indicate the presence of larger rocky bodies.

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.

So, now, when your body sends out the signal, «I need sweet food,» your brain can easily interpret it as «Get me a tub of rocky road ice cream,» instead of what your body is actually looking for, which is the energy, vitamins, and minerals that come from root vegetables.

The climactic scenes take place on the beach itself which is a long thin rocky strip of land between two bodies of water in Dorset.

It is in the neighborhood of Dwejra bay (2 km), where visitors will come across a unique natural phenomenon, the Inland Sea, a shallow body of water in the niche of a rocky coast connected to the sea through a narrow tunnel.

In each montage the artist's photograph of a rocky and savage coastal landscape is partially overlaid and merged with enlarged images of cells from her own body.

I am making the point that the surface temperature would be more like 299K if, for example, the emissivity of the dry rocky planet without water or vegetation were 0.75 rather than the 1.0000 value used for the black body temperature.