Tag

Pluto

All articles tagged with #pluto

science4 minutes ago•162 min saved

The Pluto Debate: Why a Planet's Label Sparks Memory More Than Science

More than a scientific quarrel, the Pluto-status debate taps into memory and sentiment: the 2006 IAU redefinition demoted Pluto to a dwarf planet, but many people still cling to its former identity. Psychologists note that changing established categories can provoke emotional reactions because labeling feels like permanent knowledge changing, even when science evolves. Yet science still distinguishes Pluto for its unique orbit and features, and missions like New Horizons show it remains scientifically intriguing; the debate about its label does not diminish Pluto's importance in understanding the solar system.

via Space|

#dwarf-planet #iau #nostalgia

space3 hours ago•163 min saved

Pluto’s demotion spurs a broader view of solar-system diversity

Twenty years after Pluto was reclassified by the IAU, an op-ed argues this change broadened our view of the solar system by spotlighting a diverse population of dwarf planets and showing why keeping Pluto as a dwarf helps avoid an unwieldy proliferation of planets while preserving Pluto’s scientific significance.

via Space|

#dwarf-planet #iau #planetary-definition

space1 day ago•166 min saved

Two decades after Pluto’s demotion, should it regain planet status?

Space.com notes that 20 years after the IAU reclassified Pluto as a dwarf planet, debate persists about whether it should be considered a full planet again. Proponents like Paul Byrne argue the distinction is semantic and that Pluto (and other dwarfs) share planetary processes, while the IAU definition requires a body to clear its neighborhood and Pluto’s orbit crosses Neptune’s. The article suggests the discussion centers on science communication and taxonomy as much as on nostalgia, with some calling for a new category or definition rather than simply restoring Pluto’s planetary status.

via Space|

#dwarf-planet #iau #planet-definition

science2 days ago•384 min saved

Two decades on, Pluto's planetary status remains a hotly debated topic

Two decades after Pluto was demoted to a dwarf planet in 2006, the debate over its planetary status persists: while many people still regard Pluto as a dwarf world, some voices — including NASA Administrator Jared Isaacman — advocate reinstating it as a planet, underscoring that the discussion far from over.

via NBC News|

#astronomy #demotion #planets

space10 days ago•10 min saved

Pluto Reveals a Blue Sky, Floating Ice and a Binary-Style Orbital Dance

New Horizons’ Pluto flyby uncovers a blue atmospheric haze, water-ice mountains, and nitrogen-ice glaciers with buoyant blocks, a Pluto–Charon barycentre outside Pluto that makes them orbit in a binary-like pattern, and an orbital period of about 248 years that has yet to complete an observed year since 1930, illustrating how exotic ices and weak sunlight create a dynamically active world far from Earth.

via spacedaily.com|

#astronomy #charon #new-horizons

space-and-astronomy14 days ago•55 min saved

Pluto’s atmosphere begins to freeze out as it drifts farther from the Sun

Astronomers report Pluto’s nitrogen-rich atmosphere is starting to freeze out as it moves away from the Sun, with atmospheric pressure dropping about 16% between mid-2021 and 2023. Pluto’s surface runs at roughly -382°F while the upper atmosphere sits around -333°F, conditions that favor frost formation as the air cools. Observations of ten stellar occultations from 2017–2023 show haze in the lower atmosphere settling toward lower latitudes as pressure falls. The findings, led by Amanda Sickafoose, suggest the atmosphere will not be fully frozen by aphelion (2114) but should rebuild somewhat as Pluto travels back toward the Sun. The study was published July 31 in the Planetary Science Journal.

via Yahoo|

#atmosphere #frost #nitrogen

space15 days ago•159 min saved

Pluto's Atmosphere Freezes as It Moves Away from the Sun

Pluto’s nitrogen‑rich atmosphere is starting to condense into frost as it drifts farther from the Sun on its 248‑year orbit. Surface temperatures are about -382°F (-230°C) and the upper atmosphere around -333°F (-203°C). Observations of ten stellar occultations from 2017–2023 show atmospheric pressure has declined ~16% since 2021 (likely haze settling to lower latitudes). NASA’s New Horizons had measured a baseline atmospheric pressure of about 10 microbars in 2015. Pluto’s aphelion will occur in 2114 at ~49 AU, and the atmosphere isn’t expected to be fully frozen by then; frost could sublimate and the atmosphere thicken again as Pluto heads back toward the Sun.

via Space|

#atmosphere #frost #new-horizons

science18 days ago•13 min saved

Webb spots the same mysterious molecule on Titan and Pluto

NASA’s James Webb Space Telescope detected an unidentified absorption feature at about 5.113 micrometers on both Titan and Pluto, seen in data from NIRSpec and MIRI, and not matched by published lab spectra of known ices or organics. The feature behaves like a surface absorption and varies across Titan’s disk, suggesting a material near the surface rather than in the atmosphere; the two bands differ in width, implying environmental differences rather than an identical fingerprint. While several candidate substances come close in theory (e.g., certain ices or allenes), none provide a perfect match, revealing a gap in laboratory libraries. The absorber could be a single compound, a related set, or a mixture whose spectrum shifts with conditions. Further work—targeted low-temperature lab measurements under Titan- and Pluto-like conditions and potential in-situ confirmation from Dragonfly on Titan—will be needed to identify it.

via spacedaily.com|

#james-webb-space-telescope #pluto #science

space18 days ago•16 min saved

Pluto’s Glacial Heart Hints at Recent Liquid Nitrogen Activity

A new analysis of NASA’s New Horizons images of Pluto’s Sputnik Planitia suggests liquid nitrogen may have recently flowed beneath the dwarf planet’s heart-shaped glacier, producing dark surface patterns. While Pluto’s thin atmosphere today makes liquid-nitrogen rain impossible, simulations show underground liquid nitrogen could travel through conduits and remain liquid long enough to form the observed features, indicating a time‑variable process on astronomical timescales and underscoring the need for future observations.

via Gizmodo|

#liquid-nitrogen #new-horizons #planetary-science

space19 days ago•11 min saved

The Titan trade-off: Voyager 1's detour that ended planetary flybys

In 1980, a rare outer-planet alignment forced NASA to choose between a close Titan encounter or continuing toward Pluto. They picked Titan, prioritizing a dense-atmosphere moon over a distant Pluto rendezvous, which meant Voyager 1 would never again have a planetary flyby as its path was bent out of the ecliptic. Voyager 2 continued to Uranus and Neptune, while Pluto wasn’t visited until New Horizons in 2015.

via Space Daily|

#nasa #pluto #space

space-and-spaceflight21 days ago•17 min saved

Pluto's Atmosphere Thins as It Recedes, Hinting at Collapse

New Horizons data and Earth-based stellar occultations show Pluto’s atmospheric pressure rose from 1988 to 2015, stayed roughly constant until about 2021, and then declined by as much as 16% by 2022 as the dwarf planet moved farther from the Sun, potentially signaling the first signs of atmospheric collapse that had been anticipated for decades; continued observations over the coming years will be needed to confirm the trend, with Pluto not returning closer to the Sun until 2114.

via Gizmodo|

#atmosphere #new-horizons #occultations

space22 days ago•11 min saved

Pluto’s Surprising Geology: Glaciers, Mountains, and a Hint of Ocean

The 2015 New Horizons flyby revealed Pluto as a geologically active world, with flowing nitrogen glaciers in Sputnik Planitia, towering water-ice mountains, a blue haze in its atmosphere, and hints of a subsurface liquid ocean, challenging the idea of a lifeless, frozen relic and suggesting distance and cold don’t preclude internal activity.

via Space Daily|

#hidden-ocean #new-horizons #nitrogen-glaciers

space26 days ago•12 min saved

Pluto's heart shows a young, churned nitrogen glacier erasing its history

Sputnik Planitia, the bright nitrogen-ice plain at Pluto's heart, has no confirmed impact craters, implying a convecting, glacier-like surface that renews itself on timescales of about 500,000 years; while older, cratered terrain exists elsewhere on Pluto, this region's surface is continually renewed, making parts of it effectively younger than humans, though crater counts alone don’t give a precise age.

via Space Daily|

#convection #nitrogen-ice #planetary-geology

lifestyle1 month ago•4 min saved

Dreams Align: Five Zodiac Signs Hit Positive Shifts on Saturday

On Saturday, July 25, 2026, five zodiac signs (Aries, Pisces, Scorpio, Leo, and Libra) enjoy favorable horoscopes as Neptune sextiles Pluto, aligning dreams with action. This energy encourages pursuing goals, potential financial improvements, family and lifestyle growth, a romantic shift for Leo, and possible pregnancy or engagement announcements, with Neptune softening Pluto’s intensity to keep changes hopeful rather than overpowering.

via YourTango|

#astrology #horoscope #lifestyle

space1 month ago•11 min saved

Twin mystery molecule surfaces on Pluto and Titan confound scientists

New JWST data show an unidentified absorption feature in the spectra of both Titan and Pluto, indicating a shared molecule on their surfaces (not in their atmospheres). Scientists cannot identify it yet; possible candidates include allenes, benzene when mixed with other species, or ketene, with acetylene ice also considered. Further JWST observations are planned to map where the molecule is strongest, and NASA’s Dragonfly mission to Titan could help narrow down the candidate chemicals in the mid‑2030s.

via The Independent|

#chemistry #nasa #pluto