Search results
Results From The WOW.Com Content Network
The placement of the solar system's gas giants can be explained by the grand tack hypothesis. [3] The defining differences between a very low-mass brown dwarf (which can have a mass as low as roughly 13 times that of Jupiter [4]) and a gas giant are debated. [5] One school of thought is based on formation; the other, on the physics of the ...
The defining differences between a very low-mass brown dwarf and a massive gas giant (~13 M J) are debated. One school of thought is based on planetary formation; the other, on the physics of the interior of planets.
A terrestrial planet with an arid surface consistency similar to Earth's deserts. Mars: Gas dwarf: A low-mass planet composed primarily of hydrogen and helium. GJ 1214 b: Gas giant: A massive planet composed primarily of hydrogen and helium. Saturn, Jupiter, 70 Virginis b: Helium planet: A theoretical planet that may form via mass loss from a ...
The amount of gas a super-Earth that formed in situ acquires may depend on when the planetary embryos merged due to giant impacts relative to the dissipation of the gas disk. If the mergers happen after the gas disk dissipates terrestrial planets can form, if in a transition disk a super-Earth with a gas envelope containing a few percent of its ...
Their field strengths are intermediate between those of the gas giants and those of the terrestrial planets, being 50 and 25 times that of Earth's, respectively. The equatorial magnetic field strengths of Uranus and Neptune are respectively 75 percent and 45 percent of Earth's 0.305 gauss. [16]
[14] [15] [16] But since 2005, hundreds of potentially terrestrial extrasolar planets have also been found, with several being confirmed as terrestrial. Most of these are super-Earths, i.e. planets with masses between Earth's and Neptune's; super-Earths may be gas planets or terrestrial, depending on their mass and other parameters.
Terrestrial planets are substantially different from the giant planets, which might not have solid surfaces and are composed mostly of some combination of hydrogen, helium, and water existing in various physical states. Terrestrial planets have a compact, rocky surfaces, and Venus, Earth, and Mars each also has an atmosphere. Their size, radius ...
According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...