Odd and unique orbital references even on the periphery of many solar systems
Neptune and its surrounding nyad and thalsa satellites The satellite that orbits inward is niade (solid red line). [NASA/JPL-Caltech 제공]
(Seoul = Yonhap News) Reporter Um Nam-seok = Two small satellites orbiting Neptune are orbiting uniquely like zig-zag dances to avoid collisions.
According to NASA's Jet Propulsion Laboratory (JPL), Naiad and Thalassa, discovered by Voyager 2 in 1989, around 1,850 km orbited around Neptune. It is not located outside, but does not approach each other within a distance of 3,540 km.
This is because the passing points of one another closely match the slope of the nymph that orbits Neptune from within.
Niad's standby cycle is seven hours and Thalassa is seven hours thirty minutes. Suppose you are watching a satellite at Nyal Thalassa.
Orbital dynamics experts call the two satellites moving up and down, up, down and down as 'avoidance dances', and although they look strange, they maintain stable orbits.
"We call this repeated pattern" resonance "," said Marina Brozovic of JPL, who confirmed this through the Hubble Space Telescope and published a paper in the latest issue of the journal Icarus. "There are many different ways to" dance "with satellites, satellites and asteroids.
Outside the solar system, far from the sun, only large planets have gravity and tens of moons. These satellites are often made with planets, attached to them, or sometimes skipped and captured by gravity to orbit the planet.
Some of them have unusual orbits, such as rotating in the opposite direction to the planet, or rotating orbits with Janus, whose orbits are similar to Saturn's satellite, Epimetheus.
Neptune has been identified as having 14 satellites, from the deepest nad to Nesso orbiting elliptical orbits up to 74 million kilometers.
It is believed that the inner satellites of Neptune and other Neptune are made of material that was left when the original satellite system was disrupted when Neptune grabbed Triton, a celestial body from the Kuiper belt, to make it its largest moon.
Brozovic estimates that Nied formed an unusual resonance relationship with Thalassa after the initial inclination of orbit with other deep satellites.
"Our interest has always been to find this interdependence between satellites," planetary astronomer Mark Showalter at the Institute for Extraterrestrial Life Exploration (SETI) said. It seems they are bound by this relationship. "Both satellites maintain peace by never approaching," he added.
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11/19 2019:19:19 Songgo