The new theory might satisfy two important conditions that should have been present when the capture occurred. The first is that the protoplanetary disk from which Neptune formed must have contained a large number of Pluto-sized objects.
The second is that a significant fraction of the large objects in this disk must have been binaries. Close search menu Submit search Type to search. Topics Astronomy and space Atomic and molecular Biophysics and bioengineering Condensed matter Culture, history and society Environment and energy Instrumentation and measurement Materials Mathematics and computation Medical physics Optics and photonics Particle and nuclear Quantum.
Sign in Register. Enter e-mail address Show Enter password Remember me. Sign in to Unlock all the content on the site Manage which e-mail newsletters you want to receive Read about the big breakthroughs and innovations across 13 scientific topics Explore the key issues and trends within the global scientific community. The orbital motion of the binary system causes one member to move slower than the other, which can disrupt the system and permanently change the orbital companion.
This mechanism, known as an exchange reaction, could have delivered Triton to any of a variety of different orbits around Neptune, Agnor said. But because of its unusual orbital inclination both polar regions take turns facing the Sun. Triton has a diameter of 1, miles 2, kilometers. Spacecraft images show the moon has a sparsely cratered surface with smooth volcanic plains, mounds and round pits formed by icy lava flows.
Triton consists of a crust of frozen nitrogen over an icy mantle believed to cover a core of rock and metal. Triton has a density about twice that of water. This is a higher density than that measured for almost any other satellite of an outer planet. Europa and Io have higher densities.
This implies that Triton contains more rock in its interior than the icy satellites of Saturn and Uranus. Triton's thin atmosphere is composed mainly of nitrogen with small amounts of methane.
This atmosphere most likely originates from Triton's volcanic activity, which is driven by seasonal heating by the Sun. Long ago, as it sank from a higher orbit, Triton passed close to Nereid. The smaller moon, buffeted by Triton's more powerful gravity, may have been hurled into the elliptical orbit it now follows. Smallest Planet: Mercury The smallest planet in regards to both mass and volume is Mercury — at 4, km across and 3.
In fact, Mercury is closer in size to our Moon than to Earth. Triton, the largest satellite of Neptune, orbits in the opposite direction from most moons, suggesting that Neptune captured it in the distant past. Millions of years from now, Triton will move so close to Neptune that tidal forces will rip Triton apart, forming bright new rings around the giant planet.
Yeah, not so much. It's better than trying to breathe in a vacuum, but not by much. Today, Triton makes up Triton and the Irregular Moons of Neptune While the inner moons formed in situ, it's believed all of the irregular moons were captured by Neptune's gravity. Triton is Neptune's largest moon, with a diameter of km mi and mass of 2. Destroying the Moon would send debris to Earth , but it might not be life-exterminating. If the blast were weak enough, the debris would re-form into one or more new moons; if it were too strong, there would be nothing left; of just the right magnitude, and it would create a ringed system around Earth.
Explanation: To begin with planets, as that is the easiest question to answer, there are no planets bigger than the Sun or even close to the size of the Sun.
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