Sentences with phrase «produced by a comet»

Scientists think the sounds must be produced by the comet's activity, perhaps as it releases neutral particles into space where they become electrically charged, or ionized.

Not exact matches

If sunlight must penetrate the dust covering a comet's water ice in order to warm it and produce jets, Sunshine says the Deep Impact findings suggest the ices on such dormant comets may not have run out but merely become sealed — by layers of debris, for example.

Brown University researchers have produced new evidence that lunar swirls — wispy bright regions scattered on the Moon's surface — were created by several comet collisions over the last 100 million years.

Many young stars known to host planets also possess disks containing dust and icy grains, particles produced by collisions among asteroids and comets also orbiting the star.

«We're not sure whether these stars are holding onto reservoirs of gas much longer than expected, or whether there's a sort of «last gasp» of second - generation gas produced by collisions of comets or evaporation from the icy mantles of dust grains,» said Meredith Hughes, an astronomer at Wesleyan University and coauthor of the study.

Because a comet's nucleus is made up of a combination of icy materials and loosely consolidated «dirt,» when a comet is heated by passing close to the Sun, it more or less slowly disintegrates, producing the visible tail.

This addition to the inventory of organic compounds produced in extraterrestrial environments furthers the discourse of whether their delivery to the early Earth by comets and meteorites might have aided the molecular evolution that preceded the origins of life.

The smaller debris / meteoroids produced get spread around the orbit quite quickly (read: centuries or millennia) by various physical effects (ejection speeds from the comet; radiation pressure; Poynting - Robertson effect; Yarkovsky effect).

If there is life on any Earth - type planet orbiting youthful Vega, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

If there is life on any Earth - type planet orbiting youthful Altair, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

Designed by students at the University of Colorado at Boulder, SDC is detecting dust grains produced by collisions among asteroids, comets, and Kuiper Belt objects during New Horizons» journey.

Given that Tau Ceti does not appear to be a young star, the ring of dusty debris is believed to be produced by collisions between larger comets and asteroids that break them down into smaller and smaller pieces, and Tau Ceti's disk is similar in size and shape to the disk of comets and asteroids that orbits the Sun, Sol.

If there is life on any Earth - type planet orbiting youthful EV Lac, it is likely to be primitive single - cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years and massive stellar flares.

It is produced by dust grains left behind by comet 21P Giacobini - Zinner, which was first discovered in 1900.