Sentences with phrase «massive than planets»

Less massive than stars but more massive than planets, brown dwarfs were long assumed to be rare.

Their mass is too small for full nuclear fusion of hydrogen to helium (with a consequent release of energy) to take place, but they are usually significantly more massive than planets.

Three of these planets are confirmed to be super-Earths — planets more massive than Earth, but less massive than planets like Uranus or Neptune — that are within their star's habitable zone, a thin shell around a star in which water may be present in liquid form if conditions are right.

Brown Dwarf, a celestial object more massive than a planet but less massive than a star.

Not exact matches

The first is that our planet's oceans act as a massive watery heat - sink, and currently absorb more than 90 percent of increased atmospheric heat that are associated with human activity.

Humans have such an incredible ego that they think that even the bad things they do as a group are more massive than anything even a PLANET (with a rather long and remarkably unexpected history) could handle.

Jupiter is 2.5 times more massive than all the other planets combined, so massive that its barycenter with the Sun actually lies above the Sun's surface (1.068 solar radii from the Sun's center).

The closest single star like the sun — Tau Ceti, 12 light - years away — may harbor five planets slightly more massive than Earth.

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.

This method has revealed more than 120 extrasolar planets, most of which resemble the gas - giant Jupiter — 318 times more massive than Earth.

Raymond Pierrehumbert at the University of Chicago and Eric Gaidos at the University of Hawaii in Honolulu calculated the warming effect of a hydrogen blanket on Earth - sized planets, as well as on worlds a few times more massive than our own, known as super-Earths.

As the size of the planets we looked for decreased, the number that we found increased: We found more planets with 3 times the mass of the Earth than planets with 10 times Earth's mass, more planets 10 times as massive than 100 times, and so on.

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.

Although theirs is perhaps the best - known mass extinction on Earth, by the author's account, the dinosaurs» reign was a massive success story — they thrived on the planet for more than 150 million years, and their descendants are the more than 10,000 species of birds that occupy almost every corner of the world today.

Cassini has revealed massive churning storms that rage for decades, rings that may be the best laboratory for studying how planets form and details of some of Saturn's more than 60 moons.

Today the tally of such so - called extrasolar planets stands at more than 450, including a few super-Earths, worlds that are several times more massive than ours.

The third planet takes 122 days to orbit its host and is more massive than Jupiter [4].

Astronomers have further constrained the likely whereabouts of Planet Nine: the planet that, if it exists, is more massive than the Earth and roams the outer reaches of the solar sPlanet Nine: the planet that, if it exists, is more massive than the Earth and roams the outer reaches of the solar splanet that, if it exists, is more massive than the Earth and roams the outer reaches of the solar system.

If the variations are caused by massive storms similar to those that occasionally rage on Jupiter and Saturn, then the storms are larger than any yet discovered on a planet.

Indeed, in the 1990s astronomers discovered the planet shown here; it's more massive than Jupiter and orbits the fainter yellow sun.

The group defined a plutoid as an object orbiting the sun at an average distance greater than Neptune's, massive enough to assume a nearly spherical shape (as planets do) but not massive enough to clear its orbital path of other bodies (as planets also do).

The spacecraft discovered the planet to be 0.5 per cent less massive than astronomers had thought.

No heat radiation is detected from Fomalhaut b, as would be expected for a large planet, meaning it must be smaller and less massive than Jupiter.

The first planets found were as massive as Jupiter but huddled much closer to their parent stars than Mercury is to the sun.

Gas - giant planets more massive than Jupiter — as well as «failed stars» called brown dwarfs — should conversely have much shallower winds.

TRAPPIST - 1 is an ultra-cool red dwarf star that is slightly larger, but much more massive, than the planet Jupiter, located about 40 light - years from the Sun in the constellation Aquarius.

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

Elements heavier than hydrogen and helium were more abundant later in the star - forming boom as more massive stars ended their lives early and enriched the galaxy with material that served as the building blocks of planets and even life on Earth.

Using the Gemini Planet Imager (GPI) at the Gemini South telescope in Chile, the researchers identified a disc - shaped bright ring of dust around a star only slightly more massive than the sun, located 360 light years away in the Centaurus constellation.

The Phoenix Lander may have dominated Mars news in recent weeks, but a new study performed here on Earth has turned up a whopper of a finding: The Red Planet seems to have been the victim of a massive hit and run more than four billion years ago.

Hopes of finding life were squashed, but the orbiters mapped 97 per cent of the surface revealing details of canyons and volcanoes on a massive scale for a planet little more than half the Earth's diameter.

In Earth's solar system, more massive planets have a lower abundance of elements heavier than hydrogen and helium.

Brown dwarfs are smaller than stars, but more massive than giant planets.

The new planet is a super-Earth — more massive than our world but puny relative to a gas giant.

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.

If scientists could spot this hydrogen evaporating from a planet that is a bit more temperate and little less massive than GJ 436b, that is a good sign of an ocean on the surface.

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 planet, he says, «can't possibly be more than three Jupiter - masses,» because a more massive object would clear its gravitational sphere of debris, meaning that the dust belt would have to be farther away than it is.

In the case of Gliese 581g, it appears that the stability of the planetary system would be compromised if the planet were much more than 4.3 times as massive as Earth.

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.

Directly imaged planets, such as those discussed by Kevin Wagner in a previous blog post, are mainly discovered around stars more massive than the sun (A or F stars)...

«Failed - Jupiter planets, like OGLE -2005-BLG-169Lb, are predicted to be more common than Jupiters, especially around stars less massive than the sun, according to the preferred theory of planet formation.

De Pater and her colleagues have been following Uranus for more than a decade, charting the weather on the planet, including bands of circulating clouds, massive swirling storms and convective features at its north pole.

Scientists believe there are massive amounts of ice buried under the dwarf planet's surface, given that its density is less than Earth's.

In other cases, when a solar system contains more than 3 massive Jupiter - like planets, the orbits become unstable by the gravity of these planets and some of them may spin out the planetary system.

Within the 97 - AU - radius debris disk, the discovery team believes that planets less massive than Jupiter could orbit undetected in outer orbits.

Kepler - 10c, a world many times more massive than Earth, has been recognized as a member of a new class of planet.

That same year, using six months of observations from ground - based amateur - style telescopes, scientists announced GJ 1214b, a planet 6.5 times more massive than Earth and 2.7 times wider.

It is more than 2.5 times as massive as all the other planets combined, and is a mesmerizing world of colorful bands of clouds wrapping around the globe, which can be seen even in a small telescope, but exhibit incredible detail when seen by spacecraft.

The planet's density is near 1.9 g / cm ^ 3; it is thus slightly denser and more massive than Neptune, but about the same size.