Sentences with phrase «planetary disk from»

«This observation gives us a good picture of part of the composition of ISON and, by extension, of the proto - planetary disk from which the planets were formed,» said Carey Lisse, leader of NASA's Comet ISON Observation Campaign and a senior research scientist at the Johns Hopkins University Applied Physics Laboratory.

Not exact matches

Their results indicate that planetary migration is actually stopped by a gap that is created by the star's accretion of material from the disk.

Gas giants are probably born further out, beyond some 400 million kilometers, where ice crystals can develop and accumulate into planetary cores that are massive enough to attract large amounts of gas from the disk.

The astronomers narrowed their search to stars between five and ten million years old — old enough to host full - fledged planetary systems and debris disks — and used ALMA to examine the millimeter - wavelength «glow» from the carbon monoxide in the stars» debris disks.

I apply numerical models to investigate the physical and chemical evolution of planetary materials, ranging from the small dust grains suspended in protoplanetary disks to the many kilometer - scale objects which accrete together to form planets.

There has been no shortage of proposed explanations that have been put forth in order to account for the unusual observations, from the more mundane ones which include the presence of cometary fragments and large disk of debris from planetary collisions within the star system, to the more imaginative and fascinating ones which have invoked the presence of an extraterrestrial super-civilisation that is in the process of constructing gigantic megastructures around the star itself.

Models of planetary formation suggest that giant extrasolar planets detected very near their stars formed at greater distances and migrated inward as a result of gravitational interactions with remnants of the circumstellar disks from which they accumulated.

The more heavy water, the colder the environment was in which the water formed, meaning it likely came from farther away in the disk — or may even pre-date the disk, since it's easier for heavy water to form in the molecular cloud that spawned the star and planetary system than in a dust disk.

The reason for these near - resonance configurations is not yet clear: tidal evolution could have played a role in extracting planets from resonance, and so might turbulence in the original proto - planetary disk.

In turn, the synthetic disk - integrated spectra we produce from the GCM will be used as input to a whole planetary system spectral model that emulates observations that candidate future direct imaging exoplanet missions might obtain (see the NASA Goddard Space Flight Center Haystacks project).