Sentences with phrase «planet by comets»

Not exact matches

A spiral galaxy (same goes for a spherical planet, a galaxy cluster, a comet) is shaped by forces big and small that rely on the physical properties of matter, energy, dark energy, and dark matter.

Stars, well known, have disappeared, new ones have come into view, comets, in their incalculable courses, may run foul of suns and planets and require renovation under other laws; certain races of animals are become extinct; and, were there no restoring power, all existences might extinguish successively, one by one, until all should be reduced to a shapeless chaos.

They are «stardust» and were brought here (and to other planets as well) by comets, meteors, and other debris.

«No one has before made measurements when a comet passes so close by a planet,» says Associate Professor Mats Holmström at the Swedish Institute of Space Physics in Kiruna, Sweden.

Mathematical models, combined with our understanding of how planets and comets form, suggest that the objects in the Oort cloud must have been flung there by one of the giant planets closer to the sun.

As the comet traveled across the system, it was deflected by the planets, like a ball bouncing around in a pinball machine, until Jupiter's gravity set its current orbit, Jewitt said.

Earth and the other planets of our solar system suffer occasional impacts when comets are disturbed from their orbits around the sun by the gravity of nearby stars and gas clouds.

If the orbits of these bodies are disturbed — by a passing star, for example — they return to paths close to the planets of the solar system and can become active comets.

Jenniskens and Brian Marsden, director of the Minor Planet Center in Cambridge, Massachusetts, hypothesize that the parent comet was spotted in 1490 by Asian astronomers before it fell apart.

Trigo states: «While it is true that many of these dangerous projectiles come from the main belt of asteroids after being gravitationally scattered towards the Earth by the so - called planetary resonances, in 2007 we proposed other physical mechanisms that enable these rocks to be detached from asteroids or comets as they undergo close approaches to our planet.»

But a model of Ceres presented at the LPSC has added a wrinkle by suggesting comet - like behaviour is only possible at the poles of the dwarf planet, not the lower - latitude areas where the bright spot has been seen.

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.

The team that made this discovery, led by Yale University astronomer Tabetha Boyajian — the star's namesake — suggested a variety of explanations for its strange behavior, including that the star itself was variable, that it was surrounded by clouds of dust or dusty comets, or that planets around it had collided or were still forming.

Over millions of years, these planets become shrouded by orbiting debris generated from the collision of comets, asteroids, and other objects.

What little rocky material occurs in today's ring system probably is the debris of collisions between icy ring particles and asteroids and comets swept up by the planet's huge gravitational field, says Canup.

«It's been postulated that close encounters by other stars could disturb this cloud and throw a lot of comets into the inner solar system, with possible collisional results with the inner planets and possible biological consequences.»

Jupiter - family comets, which are primarily influenced by our largest planet's gravity, have a relatively short orbit of less than 20 years.

To test their algorithm, Nemenman and Daniels created an artificial, model solar system by generating numerical trajectories of planets and comets that move around a sun.

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.

These moons» exact orbits aren't yet known because they have been observed for such a short time, so official recognition and naming by the Minor Planet Center (the clearinghouse for information on moons, comets, etc.) must wait until the moons are spotted again this fall.

A meteor shower occurs when a planet passes through a swath of debris shed by a comet, or sometimes an asteroid.

A new generation of sensitive, high - resolution telescopes will help resolve the debate by probing both dust clouds and the protoplanetary disks from which asteroids, comets, and planets form.

Similarly, there are myriad ways that planets can lose their atmospheres, through stripping by the solar wind, baking by the sun's radiation or catastrophic impacts by comets or asteroids.

In an October issue of Science, J. Matese and D. Whitmire at the University of Louisiana at Lafayette theorized that the comets are concentrated there by the long - sought - for Planet X, orbiting the sun within the Oort Cloud of comets at 25,000 times the Earth's distance from the sun.

Planets can be born in the same way, so by tracing comets like 67P back to the pebbles that made them, we can find out more about what kinds of material made Earth.

Existing theories assume that rings form when objects such as asteroids or comets are pulverised by the gravity of a planet like Saturn.

THE sight of the solar system's biggest planet being battered by the broken remains of a comet in 1994 left a vivid reminder of our own planet's vulnerability.

The formation of our Solar System was a chaotic collapse of gas and dust into the Sun, planets, asteroids, and comets we have today, punctuated by catastrophic collisions between these forming...

The Sun and its surrounding matter, including asteroids, comets, planets, and moons, held together by the Sun's gravitational influence.

Giant planet interiors are inaccessible to direct study from above, but oscillations excited by asteroid and comet impact can generate waves that are potentially observable.

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.

The modelling suggested that a Neptune - like planet actually formed much closer to Vega and was pushed by a Jupiter - like planet in an inner orbit out to its current wide orbit around 80 AUs away from Vega over about 56 million years, sweeping many comets out with it and causing the dust disk to become clumpy (Mark C. Wyatt, 2003).

Rosetta, the European Space Agency's comet chaser, cruised by Mars and photographed the planet in 2007.

Mercury and our moon hold other clues: big craters whose ages and patterns suggest a massive storm of comets and asteroids set off by the moving planets, in a pulse lasting 100 million years or so.

Planet b's atmosphere evaporating in a comet - like trail with several moons, as imagined by Whatmough.

Even if it is possible for an Earth - type planet to orbit youthful Sirius A and develop life, it is likely to be primitive single - cell, anaerobic bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years.

This composite NASA Hubble Space Telescope Image captures the positions of comet Siding Spring and Mars in a never - before - seen close passage of a comet by the Red Planet, which happened at 2:28 p.m. EDT Oct. 19, 2014.

Smaller terrestrial planets lose most of their atmospheres because of this accretion, but the lost gases can be replaced by outgassing from the mantle and from the subsequent impact of comets.

By then, 31 separate observations of the comet had been collected to determine an orbit, and the first announcement of Lovejoy's discovery was made this past Friday (Dec. 2) by the Minor Planet Center of the International Astronomical UnioBy then, 31 separate observations of the comet had been collected to determine an orbit, and the first announcement of Lovejoy's discovery was made this past Friday (Dec. 2) by the Minor Planet Center of the International Astronomical Unioby the Minor Planet Center of the International Astronomical Union.

Try the Orbit Viewer, originally written by Osamu Ajiki of AstroArts and modified by Ron Baalke of NASA's Jet Propulsion Laboratory, to see real - time orbit animations of the known comets, Edgeworth - Kuiper ice bodies, asteroids, and planets.

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.

The launched material — comets, asteroids (including the irregular moons2 captured by the giant planets), and TNOs — totaled about 3 % of Earth's mass.

Large planets will gravitationally tug on smaller bodies such as asteroids and comets as they pass by.

A wide - angle view of the star HD 106906 taken by the Hubble Space Telescope and a close - up view from the Gemini Planet Imager reveal a dynamically disturbed system of comets, suggesting a link between this and the unusually distant planet (upper right), 11 times the mass of JuPlanet Imager reveal a dynamically disturbed system of comets, suggesting a link between this and the unusually distant planet (upper right), 11 times the mass of Juplanet (upper right), 11 times the mass of Jupiter.

These supermassive black holes sustain themselves by swallowing stars, planets, asteroids, comets and clouds of gas that wander by the crowded galactic core.

This module includes the following: * A check list for students, parents and teachers to ensure that students understand all the content by the time they reach the end of the module; * A list of important terms used in this section * Descriptions of different celestial bodies (planets, stars, moons, comets, asteroids, meteoroids, meteors, meteorites) * Opportunities for student engagement - place for students to write their thoughts / answers in spaces provided (individual as well as group work) * Simple explanations on the Earth's rotation, day and night, years and seasons, equinoxes and solstices.

A biracial teen with autism living in Amsterdam prepares for an incoming comet that threatens to destroy all human life on earth by vying to get her family on a spaceship destined to leave the planet.

As Mario you'll pursue Bowser, only to get blasted into space and land on the comet, discovering that it's actually a spaceship powered from stars and run by Roselina who is, in short, the mother of the universe since she raises Lumas (little star babies), into adulthood where they become planets, suns, and galaxies.

Ideas that commonly surface include perturbations to the earth's orbit by other planets, disruptions of ocean currents, the rise and fall of greenhouse gases, heat reflection by snow, continental drift, comet impacts, Genesis floods, volcanoes, and slow changes in the irradiance of the sun.