Triton (moon)

William Lassell, the discoverer of Triton
The orbit of Triton (red) is opposite in direction and tilted −23° compared to a typical moon's orbit (green) in the plane of Neptune's equator.
Animation of Triton
The Kuiper belt (green), in the Solar System's outskirts, is where Triton is thought to have originated.
Artist's impression of Triton, showing its tenuous atmosphere just over the limb.
Clouds observed above Triton's limb by Voyager 2.
Interpretative geomorphological map of Triton
Triton's bright south polar cap above a region of cantaloupe terrain
Cantaloupe terrain viewed from 130,000 km by Voyager 2, with crosscutting Europa-like double ridges. Slidr Sulci (vertical) and Tano Sulci form the prominent "X".
Tuonela Planitia (left) and Ruach Planitia (center) are two of Triton's cryovolcanic "walled plains". The paucity of craters is evidence of extensive, relatively recent, geologic activity.
NASA illustration detailing the studies of the proposed Trident mission
Neptune (top) and Triton (bottom) three days after flyby of Voyager 2
thumb|Close up of the volcanic province of Leviathan Patera, the caldera in the center of the image. Several pit chains extend radially from the caldera to the right of the image, while the smaller of the two cryolava lakes is seen to the upper left. Just off-screen to the lower left is a fault zone aligned radially with the caldera, indicating a close connection between the tectonics and volcanology of this geologic unit.
thumb|Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers
thumb|Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unusually crater free, indicating they are young and were recently molten.

Largest natural satellite of the planet Neptune, and was the first Neptunian moon to be discovered, on October 10, 1846, by English astronomer William Lassell.

- Triton (moon)

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Neptune Moon Triton - Proposed Trident Mission (16 June 2020)

Trident (spacecraft)

Space mission concept to the outer planets proposed in 2019 to NASA's Discovery Program.

Space mission concept to the outer planets proposed in 2019 to NASA's Discovery Program.

Neptune Moon Triton - Proposed Trident Mission (16 June 2020)
alt=Venus-real color|Venus (flyby)
alt=Earth Western Hemisphere|Earth (3x flybys)
alt=Jupiter and its shrunken Great Red Spot|Jupiter (flyby)
alt=Io highest resolution true color|Io (flyby)
alt=Neptune from Voyager 2 (5278071676)|Neptune (targeted flyby)
alt=Triton moon mosaic Voyager 2 (large) - non-edit version|Triton (targeted flyby)

The concept includes flybys of Jupiter and Neptune with a focus on Neptune's largest moon Triton.

The most important resonance form of carbon monoxide is –C≡O+. An important minor resonance contributor is the non-octet carbenic structure :C=O.

Carbon monoxide

Colorless, highly poisonous, odorless, tasteless, flammable gas that is slightly less dense than air.

Colorless, highly poisonous, odorless, tasteless, flammable gas that is slightly less dense than air.

The most important resonance form of carbon monoxide is –C≡O+. An important minor resonance contributor is the non-octet carbenic structure :C=O.
Carbon monoxide concentrations in Northern Hemisphere spring as measured with the MOPITT instrument
Energy level scheme of the σ and π orbitals of carbon monoxide
The HOMO of CO is a σ MO.
The LUMO of CO is a π* antibonding MO.
Structure of iron pentacarbonyl.
Iron pentacarbonyl.

It has also been identified spectroscopically on the surface of Neptune's moon Triton.

Flamsteed House in 1824

Royal Observatory, Greenwich

Observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north.

Observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north.

Flamsteed House in 1824
Royal Observatory, Greenwich c. 1902 as depicted on a postcard
Greenwich Observatory (Latinized as "Observatorium Anglicanum Hoc Grenovici prope Londinum"), as illustrated in Johann Gabriel Doppelmayr's map of the southern celestial hemisphere, ca. 1730
Royal Observatory, Greenwich
Dome of the Greenwich 28 inch refractor telescope and tree
The Airy Transit Circle, used for over a century (1851–1953) as the reference point when charting the heavens and determining times, thus earning for it the epithet "the centre of time and space"
The building housing the origin of the Greenwich Prime Meridian
Laser projected from the observatory marking the Prime Meridian line
Laser at night
Shepherd Gate Clock at Royal Greenwich Observatory
One of the hyper-accurate timekeepers at the observatory
The time ball is the red ball on a post – when it drops a certain time is signalled. This allowed clocks to be set from afar with great accuracy, particularly the chronometers of ships on the River Thames below, prior to sailing. The observatory would first determine the time by stellar observations.
Dome of the Great Equatorial Building overlooking Greenwich Park
21st-century view of the Altazimuth Pavilion
Standard lengths on the wall of the Royal Observatory, Greenwich, London – 1 yard (3 feet), 2 feet, 1 foot, 6 inches (1/2-foot), and 3 inches. The separation of the inside faces of the marks is exact at an ambient temperature of 60 °F and a rod of the correct measure, resting on the pins, will fit snugly between them.
Aerial view of the Royal Greenwich Observatory, Herstmonceux site in East Sussex; the dome that formerly housed the Isaac Newton Telescope is the single dome to the right. The telescope was moved to La Palma in the Canary Isles in 1979.
Former Royal Greenwich Observatory, Herstmonceux, East Sussex
Greenwich House at Cambridge
The Queen's House (centre left) at Greenwich, with the Royal Observatory on the skyline behind, in 2017.
The Magnetic Pavilion, 1900
Tourists flock to the Observatory museum, 2009
The centuries-old Flamsteed House overlooking Greenwich Park in London. The statue at left is of Major General James Wolfe, who died capturing Quebec in 1759, and was buried in St Alfege Church, Greenwich.

The Lassell two-foot reflector was a famous metal-mirror telescope that had been used to discover the Moons Triton and Hyperion.

Sublimating dry ice pellet, with white frost on the surface

Dry ice

Solid form of carbon dioxide.

Solid form of carbon dioxide.

Sublimating dry ice pellet, with white frost on the surface
Comparison of phase diagrams of carbon dioxide (red) and water (blue) as a log-lin chart with phase transitions points at 1atmosphere pressure
An ice cream cart
Sublimation
Dry ice in water
Dry ice blasting used for cleaning a rubber mold
Dry ice blasting used for cleaning electrical installations
Dry ice bomb
Dry ice pellet subliming in water, releasing thick white fog.
A UN 1845 label for dry ice

Voyager 2 observations of Neptune's moon Triton suggested the presence of dry ice on the surface, though follow up observations indicate that the carbon ices on the surface are carbon monoxide but that the moon's crust is composed of a significant quantity of dry ice.

Diapirs in a subducting plate boundary

Diapir

Type of geologic intrusion in which a more mobile and ductily deformable material is forced into brittle overlying rocks.

Type of geologic intrusion in which a more mobile and ductily deformable material is forced into brittle overlying rocks.

Diapirs in a subducting plate boundary
A lava lamp illustrates Rayleigh–Taylor instability-type diapirism in which the tectonic stresses are low.
Geological cross section through the Northwestern Basin of Germany (Ostfriesland-Nordheide). Salt domes have penetrated younger layers and moved near to the surface. They sometimes form pockets where petroleum and natural gas can collect. Excavated salt domes are also used for underground storage.

In addition to Earth-based observations, diapirism is thought to occur on Neptune's moon Triton, Jupiter's moon Europa, Saturn's moon Enceladus, and Uranus's moon Miranda.

The internal structure of Earth

Mantle (geology)

Layer inside a planetary body bounded below by a core and above by a crust.

Layer inside a planetary body bounded below by a core and above by a crust.

The internal structure of Earth

Titan and Triton each have a mantle made of ice or other solid volatile substances.

Artist's conception of a protoplanetary disk

Formation and evolution of the Solar System

The formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.

The formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.

Artist's conception of a protoplanetary disk
Pierre-Simon Laplace, one of the originators of the nebular hypothesis
Hubble image of protoplanetary discs in the Orion Nebula, a light-years-wide "stellar nursery" probably very similar to the primordial nebula from which the Sun formed
Meteor Crater in Arizona. Created 50,000 years ago by an impactor about 50 m across, it shows that the accretion of the Solar System is not over.
Artist's conception of the giant impact thought to have formed the Moon
Neptune and its moon Triton, taken by Voyager 2. Triton's orbit will eventually take it within Neptune's Roche limit, tearing it apart and possibly forming a new ring system.
Relative size of the Sun as it is now (inset) compared to its estimated future size as a red giant
The Ring nebula, a planetary nebula similar to what the Sun will become
Location of the Solar System within the Milky Way

The largest irregular moon is Neptune's moon Triton, which is thought to be a captured Kuiper belt object.

Solid nitrogen on the plains of Sputnik Planitia on Pluto next to water ice mountains

Solid nitrogen

Number of solid forms of the element nitrogen, first observed in 1884.

Number of solid forms of the element nitrogen, first observed in 1884.

Solid nitrogen on the plains of Sputnik Planitia on Pluto next to water ice mountains
Much of the surface of Triton is covered in the hexagonal form of solid nitrogen (the β crystal phase), which can be seen as a bluish green band around the equator in this synthetic color photomosaic.
Linear N8, EEE isomer (trans; EZE isomer – not shown – is cis) after Hirschberg et al. (2014)
Linear N6 after Hirschberg et al. (2014)

Solid nitrogen forms a large part of the surface of Pluto (where it mixes with solid carbon monoxide and methane) and the Neptunian moon Triton.

Neptune Odyssey

Neptune Odyssey is an orbiter mission concept to study Neptune and its moons, particularly Triton.

Triton, fought by Herakles.

Triton (mythology)

Greek god of the sea, the son of Poseidon and Amphitrite, god and goddess of the sea respectively.

Greek god of the sea, the son of Poseidon and Amphitrite, god and goddess of the sea respectively.

Triton, fought by Herakles.
Triton blowing a conch. Statue at Wasserspiele Hellbrunn, Hellbrunn Palace, Salzburg, Austria
Attic black-figure hydria attributed to the Rycroft Painter, dating c. 520 – c. 510 BCE, depicting Herakles wrestling Triton, Eskenazi Museum of Art
Tritoness bronze applique, Greek, 2nd century BC, Cleveland Museum of Art
Cameo of Augustus in a quadriga drawn by tritons (Kunsthistorisches Museum)
The Triton Fountain (1642–3), by Gianlorenzo Bernini, Rome
A Triton blowing on a conch on this title page of Alexander Justice, Samuel Pepys and Josiah Burchett: A general treatise of the dominion of the sea, 1710

The largest moon of the planet Neptune has been given the name Triton, as Neptune is the Roman equivalent of Poseidon.