Sentences with phrase «massive planets orbiting the star»

AO has measured the mass of the giant black hole at the center of our Milky Way Galaxy, imaged the four massive planets orbiting the star HR8799, discovered new supernovae in distant galaxies, and identified the specific stars that were their progenitors.

Not exact matches

Brown dwarfs are not quite massive enough to shine like stars, but nor are they planets because they don't usually orbit stars.

Many planets outside the solar system are even more massive than Jupiter, and they orbit their Sun - like stars at an Earth - like distance, but these faraway super-Jupiters are effectively giant gas balls that can not support life because they lack solid surfaces.

The planet, 51 Pegasi b, was half as massive as Jupiter, but its 4 - day orbit was impossibly close to the star, far smaller than the 88 - day orbit of Mercury.

The situation, says former LHCb spokesperson and University of Oxford physicist Guy Wilkinson, is roughly analogous to a planetary system in which the light quark is akin to a planet orbiting a binary pair of massive stars.

But only the lucky binaries seem to have planets that orbit them; some stellar binaries that lack orbiting bodies have a different third party — a distant star that's so massive, its gravitational fluxes actually change the orbit of the stellar binary, causing the two stars to shrink together in a process called orbital decay.

Three planets were discovered, two orbiting stars similar to the Sun and one orbiting a more massive and evolved red giant star.

But astronomers have always wondered about the paucity of close - in brown dwarfs: While many giant planets have been found in small orbits, whirling around their sunlike stars in just a few days, the more massive brown dwarfs appear to shun these intimate relationships.

And second, younger stars often have planets — including the massive so - called hot Jupiters — orbiting much closer than Mercury does to the sun.

The planet is four times as massive as Uranus, but it orbits the first star at almost exactly the same distance as Uranus orbits our sun.

An artist's impression shows extrasolar planet HD 189733b, where scientists say they've found water vapor, closely orbiting its much more massive star.

The team observed the star for a month and a half and detected a regular fluctuation in the star's velocity, revealing the presence of a planet almost as massive as Jupiter, orbiting its host star at a distance only one twentieth of that between the Earth and the Sun.

The five planets are hot Jupiters, massive worlds that orbit close to their host stars.

And radial velocity searches, which look for Doppler shifts in a star's light as it wobbles under the influence of an orbiting companion, are more attuned to massive planets that induce greater gravitational wobbles in their host stars.

Finding massive planets is not new, but it is to find them orbiting each other instead of a star.

The new study suggests that the «hot Jupiter» WASP - 18b, a massive planet that orbits very close to its host star, has an unusual composition, and the formation of this world might have been quite different from that of Jupiter as well as gas giants in other planetary systems.

The planet, which is 1.25 times as massive as Jupiter, lies 2300 light years from Earth and orbits a bloated, ageing star slightly less massive than the sun.

Marois and his team used ground - based infrared detection to seek out exoplanets around nearby, young, massive stars — those whose planets would have wide orbits and emit significant amounts of radiation as they cool from their relatively recent births millions of years ago.

Other photographed objects have been too massive to be conclusively labeled planets, falling instead into the brown dwarf category (objects about eight to 80 Jupiters in size that lack sufficient mass to ignite hydrogen fusion in their cores, thereby never becoming true stars); have been found to themselves orbit brown dwarfs rather than stars; or have not been shown to be gravitationally bound to a star.

The researchers timed the transits of WASP 3 b, a massive planet discovered in 2007 that orbits a star larger than the sun some 700 light - years away.

Around smaller, less massive and dimmer dwarf stars, however, planets would have to orbit closer in order to sustain a surface temperature that is warm enough to keep water liquid and so the star would appear larger in the sky.

Both of these techniques work best when the planets are either extremely massive or when they orbit very close to their parent stars.

While Kepler has provided a massive amount of data, including 3,000 planet candidates, the next step is sorting through the findings to learn more about the host stars and the orbiting planets.

The planet tips the scales at 4.8 Earth masses and is a little less that twice Earth's diameter and the least massive exoplanet to date that has been found orbiting a normal star.

The planet depicted here — GJ 504b, a huge body four times as massive as Jupiter — orbits a star 57 light - years away.

Exceptions include a number of planets discovered orbiting burned - out star remnants called pulsars, such as PSR B1257 +12, [14] the planets orbiting the stars Mu Arae, 55 Cancri and GJ 436, which are approximately Neptune - sized, and a planet orbiting Gliese 876 that is estimated to be about six to eight times as massive as Earth and is probably rocky in composition.

This technique is most sensitive to massive planets orbiting hundreds of millions of kilometres from their star and has also been used to discover a population of free - floating giant planets that do not orbit any star.

Furthermore, gravitational microlensing can complement other exoplanet detection techniques like radial velocity and the transit method, which are limited in discovering mostly massive planets in relatively close orbits around their host stars.

The term Jupiters is often used to describe these worlds, and the term hot Jupiters is applied to those massive planets orbiting very near their stars.

Still, the smallest planet known to orbit the star is estimated to be five times as massive as Earth with about 1.5 times Earth's diameter.

Given the large orbital eccentricities of these two objects (which move beyond 500 AUs of the Sun), some astronomers have argued that they were likely to have been strongly perturbed by a massive celestial object (which is unlikely to have been Neptune as they do not come close enough to feel its gravitational influence) such as the passing of a rogue planet (perturbed from its primordial orbit by the gas giants of the inner Solar Sylstem) or one or more passing stars, which could have dragged the two objects farther out after initial orbital perturbation by Neptune or as part of a «first - generation» Oort Cloud.

Finally, as a short - period outlier among giant planets orbiting giant stars, study of Kepler - 432b may help explain the distribution of massive planets orbiting giant stars interior to 1 AU.

The smallest planet orbits Kepler - 33, a star older and more massive than our Sun, Sol, which also had the most detected planet candidates at five (ranging in size from 1.5 to 5 times that of Earth) in uninhabitable, hot inner orbits closer to their star than even Mercury around our Sun (NASA Kepler news release; and JPL news release).

In 1995, astronomers confirmed that a massive gas giant planet was orbiting the star 51 Pegasi.

Image that we have a star with a very massive planet in a very eccentric orbit close in.