Sentences with phrase «large young planets»

Not exact matches

The snag he's untangling: how dust grains in the matter orbiting a young protostar avoid getting dragged into the star before they accumulate into bodies large enough that their own gravity allows them to rapidly attract enough material to grow into planets.
The researchers found that relatively cool accretion discs around young stars, whose inner edges can be several times the size of the Sun, show the same behaviour as the hot, violent accretion discs around planet - sized white dwarfs, city - sized black holes and supermassive black holes as large as the entire Solar system, supporting the universality of accretion physics.
One or more large, young planets — possibly the size of Neptune or Jupiter — must dictate the shape of the dust, according to simulations.
The prevailing view has been that planets mostly accumulate water only long after they form: If a young planet with water trapped in its rocks collides with another heavenly body or even large debris — common occurrences in the cosmos — the impact would, presumably, drive accumulated water into space, leaving many planets bone - dry.
Unless the planets are very young and very large, no instruments are currently capable of directly imaging these planets.
And with good reason: The largest of those moons, 3,200 - mile - wide Titan, has an atmosphere that may be similar to that of our own planet in its younger days, and Enceladus, a 300 - mile - wide ball, has a geologically active surface.
Although scientists suspect that the extended atmospheres of young giant planets can capture passing bodies, «the origin of these moons is still a mystery,» says Luu, who was not a member of the discovery team, «But [the large number of moons] is an important clue that tells us the process must have been very efficient,» says Luu.
Earth's moon probably formed when a large body collided with the young planet and sent hot mantle material flying into space.
Astronomers found signs of a growing planet around TW Hydra, a nearby young star, using the Atacama Large Millimeter / submillimeter Array (ALMA).
Astronomers using the Atacama Large Millimeter / submillimeter Array (ALMA) have found the clearest indications yet that planets with masses several times that of Jupiter have recently formed in the discs of gas and dust around four young stars.
Early in the formation of our solar system (before 3.9 billion years ago) there was lots of large debris striking the surfaces of the young planets and moons; these older impact basins are larger than the more recent craters.
STScI / NASA press releases: Hubble Makes the First Precise Distance Measurement to an Ancient Globular Star Cluster Hubble Unmasks Ghost Galaxies Deepest View of Space Yields Young Stars in Andromeda Halo Hubble Identifies Source of Ultraviolet Light in an Old Galaxy ESA press releases: Hubble Unmasks Ghost Galaxies Four Unusual Views of the Andromeda Galaxy Public speaking: On the Trail of the Missing Galaxies High - Level Science Products from Large and Treasury Programs: GO - 9453: The Age of the Andromeda Halo (126 orbits) GO - 10265: The Formation History of Andromeda (107 orbits) GO - 10816: The Formation History of Andromeda's Extended Metal - Poor Halo (128 orbits) GO - 11664 / 12666: The WFC3 Galactic Bulge Treasury Program: Populations, Formation History and Planets (56 orbits) GO - 12549: The Formation History of the Ultra-Faint Dwarf Galaxies (113 orbits)
However, it wasn't expected that so many large planets are growing around such a young star at the age of 1 million years in a «standard model» that was long accepted by astronomers.
New observations with the Atacama Large Millimeter / submillimeter Array (ALMA) radio telescope in Chile show that the planet, located about 550 light - years away from Earth in the constellation Chamaeleon, is surrounded by a protoplanet - like disk of gas and dust — which is a distinctive feature of young stars, not planets.
Since planets cool rapidly as they age, GPI is most sensitive to young, hot planets at large orbital distances.
We performed a pilot study with the extreme - AO system on the Spectro - Polarimetric High - contrast Exoplanet REsearch (SPHERE) on the Very Large Telescopes (VLT) to look for giant planets around a young white dwarf, GD 50.
The general consensus among scientists is that the young Earth's atmosphere contained much larger quantities of greenhouse gases (such as carbon dioxide and / or ammonia) than are present today, which trapped enough heat to compensate for the lesser amount of solar energy reaching the planet.
In 2014, the GPI team will begin a large - scale survey, looking at 600 young stars to see what giant planets orbit them.
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The mission of the Young Voices for the Planet film series is to limit the magnitude of climate change and its impacts by empowering children and youth, through uplifting and inspiring success stories, to take an essential role in informing their communities — and society at large, challenging decision - makers, and catalyzing change.
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