Tag

Cassini Huygens

All articles tagged with #cassini huygens

science13 days ago•11 min saved

Titan’s climate: a warming blanket and a cooling haze leave surface only modestly above the model

Titan’s climate is a tug-of-war between a greenhouse warming (+21 K, ~38°F) from its thick atmosphere and a high-altitude antigreenhouse cooling (−9 K, ~16°F) from hazy skies. Net effect: the surface sits about 22°F warmer than Titan’s effective temperature (94 K vs 82 K). Huygens and Cassini measurements corroborate the surface temperature, while the breakdown into warming and cooling terms comes from a 1991 model by McKay, Pollack and Courtin, illustrating Titan’s climate as a balance of large opposing processes.

via Space Daily|

#antigreenhouse #atmosphere #cassini-huygens

space1 month ago•11 min saved

Titan's Seasons Last About Seven and a Half Earth Years Each

On Titan, Saturn’s largest moon, seasons align with Saturn’s 29-year orbit, so each of Titan’s four seasons lasts roughly 7.5 Earth years. The moon’s ~27° tilt and position on Saturn’s equatorial plane mean Titan experiences an Earth-like weather cycle powered by liquid methane/ethane, including rain, rivers, and hydrocarbon lakes, though data across a full Titan year remains partial. Insights come mainly from NASA’s Cassini–Huygens mission; questions about the methane source and long climate cycles persist, highlighting how a calendar defined by a distant planet can stretch across lifetimes.

via Space Daily|

#cassini-huygens #methane #saturn

space1 month ago•13 min saved

Titan's rivers flow with methane, not water

Titan hosts a methane-driven hydrological cycle: methane rain feeds rivers and lakes of methane and ethane, while surface water remains frozen as rock. Its frigid, nitrogen-rich atmosphere and −179°C surface temperature let methane act like water, with radar and Huygens data showing branching channels and lakebeds carved by hydrocarbons. The largest seas lie near the north pole, while equatorial regions host organic dunes. Titan may conceal a subsurface water ocean, and methane replenishment remains an open question. NASA's Dragonfly mission will explore Titan's dunes to study organic chemistry and habitability.

via Space Daily|

#cassini-huygens #ethane #hydrocarbon-lakes

space1 month ago•15 min saved

Titan's Vast, Fireproof Hydrocarbon Seas

New analysis of Cassini-Huygens data shows Titan's northern seas Kraken Mare, Ligeia Mare, and Punga Mare hold tens of thousands of cubic kilometers of liquid methane and ethane—far more hydrocarbon fuel than Earth's proven reserves—yet the atmosphere is almost completely devoid of oxygen, so nothing on Titan can burn; even lightning would not ignite the fuel, though Titan maintains a methane-based weather cycle, complete with rainfall and rivers; the Huygens probe landed in 2005 and future Dragonfly missions will explore Titan further.

via Space Daily|

#cassini-huygens #dragonfly #ethane

space2 months ago•11 min saved

Huygens' Titan Landing Still the Solar System's Farthest Reach

Only one spacecraft has ever landed in the outer solar system: the European Huygens probe touched Titan in January 2005 during the Cassini-Huygens mission, revealing a methane-driven hydrological cycle and ground of water-ice pebbles; it operated about 72 minutes after landing, but a missed command meant half of its wind data and some descent images were lost, leaving Titan the only outer-solar-system surface world visited—though NASA's Dragonfly aims to visit Titan in the 2030s.

via Space Daily|

#cassini-huygens #huygens #outer-solar-system

space3 months ago•11 min saved

Huygens on Titan: the 2005 landing that still stands as humanity’s only outer-solar-system touchdown

ESA’s Huygens lander descended through Titan’s orange haze in January 2005, touched down after about 2.5 hours, and transmitted for roughly 72 minutes from the surface; as the part of the Cassini-Huygens mission, it remains the only landing in the outer solar system to date. Titan’s thick nitrogen-rich atmosphere, frigid surface around -179 C, and the mission’s long, multi-step descent informed future exploration (e.g., NASA’s Dragonfly) and underscored the scale and distance of far-off planetary exploration; the mission cost was about $3.9 billion.

via Space Daily|

#cassini-huygens #huygens #outer-solar-system

science1 year ago•4 min saved

Titan's Atmosphere Wobbles Like a Gyroscope, Baffling Scientists

Scientists analyzing data from the Cassini-Huygens mission discovered a mysterious gyroscopic motion in Titan's atmosphere that is independent of its surface rotation and varies with seasons, posing new questions about atmospheric dynamics and aiding future missions like NASA's Dragonfly.

via The Debrief|

#atmosphere #cassini-huygens #gyroscopic-motion

science2 years ago•3 min saved

"New Insights Reveal Titan's Dynamic Seas and Rivers"

A new study using bistatic radar data from the Cassini-Huygens mission has provided detailed insights into the composition and surface roughness of Titan's hydrocarbon seas. The research, led by Cornell University, found variations in the seas' dielectric constants and surface calmness, with indications of pure methane rivers mixing with ethane-rich seas. This analysis paves the way for further discoveries from Cassini's extensive data on Titan.

via Phys.org|

#cassini-huygens #hydrocarbon-seas #radar-data