Sentences with phrase «of ejecta»

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

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

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 Kamil Crater, however, has been well preserved, with the radial streaks of ejecta thrown out during impact still visible.

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.

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.

«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.

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.

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.

Based on the amount of ejecta fading, researchers estimated the crater formed between 1980 and 1985, and believe it is the remains of an impact by a small hunk of rock a few feet in diameter.

Estimating the actual optical properties of the ejecta is important, as is the background level of aerosols from other sources (e.g. industrial).