Sentences with phrase «lyot ejecta»

Large amounts of phosphorus could be from the moon impacting (moon surface = KREEP (potassium, rare earth elements, phosphorus)-RRB- Even in their picture showing meteorites landing on molten surface (lol) shows a glowing molten moon — they ignore the big blob in the sky and say «meteorites» instead of «ejecta» — they should be put up against a wall and shot with silly string and cast out into the outer darkness of unemployment to wail and gnash their rotting teeth.

But in analysing the ejecta from the comet after impact, she says, «one of the first things we saw was water ice».

In Crida and Charnoz's conception, that ejecta first flattened into a ring around the planet, which then spread out and coagulated into the moon.

Earth - based observers had trouble seeing the ejecta, because the densest part of the debris cloud flew low across the lunar surface and was hidden by a high ridge.

«The asymmetry of the radioactive ejecta is more pronounced the larger the neutron star kick is,» he adds.

But also new elements are created in the hot ejecta of the explosion, among them radioactive species such as 44Ti (titanium with 22 protons and 22 neutrons in its atomic nuclei) and 56Ni (28/28 neutrons / protons), which decay to stable calcium and iron, respectively.

The streaks are odd in that they extend much farther from the craters than normal ejecta patterns, and they are only visible in thermal infrared images taken during the Martian night.

When that ejecta rammed into surrounding interstellar gas, it created a shock wave — the equivalent of a cosmic «sonic boom.»

Similarly, it's likely that ejecta from Earth has carried microorganisms to Mars, where they had the opportunity to colonize.

We may see an ejecta curtain and a bright flash.

However, heating of the ejecta and the low escape velocity from Mars suggests that water vapor would have been lost, implying that the moons will be dry if they formed by impact.»

«The band has not faded significantly since September, indicating that this ejecta may take years to settle out of the upper atmosphere,» says Tom Herbst of the Max Planck Institute for Astronomy in Heidelberg, Germany, who used a 3.5 - metre telescope to study Jupiter in the near infrared on 19 December.

And yet, some of Mercury's craters have streaks of ejecta comparable in length to those found on the moon.

To explain the discrepancy, Tamara Goldin of the University of Vienna and Jay Melosh of Purdue University in Indiana studied how ejecta falling through the atmosphere might affect heat transfer from the top of the atmosphere to the ground.

They are built by fragments (called ejecta) thrown up (ejected) from a volcanic vent, piling up around the vent in the shape of a cone with a central crater.

The authors suggest that searches for these impact ejecta layers will be more fruitful for determining how many times Earth was hit by big asteroids than searches for large craters.

Theory aside, MRO's spectrometer clearly identified the bright ejecta around one larger crater as water ice.

«For reasons that we're not totally sure about, the same properties can arise from the scattering of rocky ejecta on the blocky terrain of young impact craters on the moon,» Campbell notes.

«Newly formed relativistic ejecta decelerate quickly as they interact with the interstellar medium in the galaxy.

«The deeper iron - rich ejecta is the last stuff that got out of the star, yet it's now the furthest from the center of the explosion,» Hughes says.

The fast rise of the light curves, subsequent decay, and rapid color evolution are consistent with multiple ejecta components of differing lanthanide abundance.

«Our best guess is that prior to the explosion, the star cast off some shell of material, and the supernova ejecta later collided with this shell.»

«I'm not convinced we haven't seen the ejecta.»

Roth asks, «Do the vents extend down to a subsurface ocean or are the ejecta simply from warmed ice caused by friction stresses near the surface?»

Update: On 16 October, NASA released an image of a faint ejecta plume observed by the LCROSS shepherding spacecraft.

One reason for the spectacular burst could be that puncturing the comet's crust released subsurface pressure, allowing a much bigger plume of ejecta to spurt out, Yeomans said.

Charon's near - infrared spectra reveal highly localized areas with strong ammonia absorption tied to small craters with relatively fresh - appearing impact ejecta.

* Joanna Morgan will share results of modeling to determine more accurately the amount of sulfur and CO2 shot into the atmosphere, including a second phase of gas release when ejecta was re-vaporized.

Rather, Palumbo said, «The vast majority of the valleys seem to emerge from beneath the ejecta on its outer periphery, which casts serious doubt on the rainwater scenario.»

«Based on the likely location of ice deposits during this period of Mars» history, and the amount of meltwater that could have been produced by Lyot ejecta landing on an ice sheet, we think this is the most plausible scenario for the formation of these valleys» said David Weiss, a recent Ph.D. graduate from Brown and the study's lead author.

That left the researchers with the idea that meltwater, produced when hot ejecta interacted with an icy surface, carved the Lyot valleys.

The reason for that, they suggest, is that instead of landing directly on the surface, ejecta from Lyot landed on a thick layer of ice, which prevented it from gouging the surface beneath the ice.

Any rain related to the plume would have fallen after the rocky impact ejecta had been deposited outside the crater.

So if rainwater carved the valleys, one would expect to see valleys cutting through the ejecta layer.

Based on data in part from MGS, researchers noted a lack of ejecta debris in the region as well as features that usuallly point to volcanism, such as «bathtub rings» created when lava recedes from the area.

Circular features are regions of fallback of ejecta from active volcanos.

It's this cosmic ejecta that alerts astronomers to the existence of these mysterious monsters.

«We have found a remarkably large dust mass concentrated in the central part of the ejecta from a relatively young and nearby supernova,» said Remy Indebetouw, an astronomer at the National Radio Astronomy Observatory (NRAO) and the University of Virginia, both in Charlottesville, USA.

Ejecta and vaporized rock were sprayed into the air and deposited around the globe.

No dust emission is seen from the nova ejecta.

We have also estimated the range for the ejecta mass in V2468 Cyg to be 3 x 10 ^ -LCB--6 -RCB-- 10 ^ -LCB--5 -RCB- Msun.

Duginavi hosts the small Oxo Crater, recognizable by its bright rim and ejecta.

Remarkably, many of the particles that rain down on Jupiter's poles appear to be ejecta from volcanoes on Io.

Scientists revealed that the deep hole on Mars is not an impact crater, due to the lack of signs of ejecta or a raised rim.

Some of this brighter material appears to have flowed further downslope to form the heart shape, as the small impact occurred on the ejecta blanket of a much larger impact crater.

Scientists have attributed the patterns observed in supernova explosions and ejecta from shock - induced metal melt to RM instability.

For example, a standard impact crater would boast a raised central point, an uplifted crater wall and an ejecta blanket of debris, all of which Siloe Patera lacks.

Phobos: Regolith and ejecta blocks investigated with Mars Orbiter Camera images P. C. Thomas, J. Veverka, R. Sullivan, D. P. Simonelli, M. C. Malin, M. Caplinger, W. K. Hartmann, and P. B. James Journal of Geophysical Research 105 (E6), 15,091 — 15,106, doi: 10.1029 / 1999JE001204, 25 June 2000.

What the results showed was that the majority of these ejecta would fall toward the Sun and back to their parent planets in a short amount of time.

With over 40 Solar - masses, extremely high luminosity, a variable spectra, and surrounding ejecta, it is classified as a Luminous Blue Variable like Eta Carinae, as an extremely large star that are now often regarded as the evolutionary link between main - sequence O stars and the more evolved, smaller but similarly explosive, Wolf - Rayet stars.