Tag

Iau

All articles tagged with #iau

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

space18 days ago•11 min saved

Saturn's moon tally climbs to 285 after 2025–2026 confirmations

Saturn's official confirmed-moon total rose from 146 to 285 within about a year after the IAU and Minor Planet Center recognised 128 new moons in March 2025 and 11 more in March 2026, a shift driven by deeper surveys and orbit-confirmation work; the 285 figure reflects objects with established Saturn-centric orbits, not a complete census, and older textbooks can be outdated on this count.

via Space Daily|

#astronomy #iau #minor-planet-center

space1 month ago•12 min saved

Saturn Doubles Its Moon Count in a 2025 Discovery Wave

In March 2025, the IAU recognized 128 new irregular Saturnian moons, lifting Saturn’s confirmed total from 146 to 274—more than any other planet—and reflecting a shift in how we detect tiny, distant satellites via shift-and-stack surveys; by March 2026 the tally rose further to 285, underscoring that the outer solar system’s inventory is still expanding and that many new moons are fragments or captured bodies on distant, inclined orbits.

via Space Daily|

#astronomy #iau #irregular-moons

space3 months ago•5 min saved

NASA chief pushes to revisit Pluto’s planetary status, reigniting a long-running debate

NASA Administrator Jared Isaacman signaled support for restoring Pluto’s status as a planet and suggested escalating the discussion within the scientific community, a move that has sparked division among researchers who question whether such a decision should come from NASA or require international consensus and the IAU, especially given Pluto-sized objects and the IAU criteria for planets.

via Nature|

#astronomy #iau #nasa

science3 months ago•3 min saved

NASA Chief Pushes to Restore Pluto’s Planet Status

NASA Administrator Jared Isaacman told a Senate hearing he supports reconsidering Pluto’s status as a planet, reviving the decades-long debate after the IAU downgraded Pluto to a dwarf planet in 2006. The discussion centers on Pluto’s location in the Kuiper Belt and its failure to clear its orbit, one of the IAU’s criteria for a full planet, with Isaacman signaling ongoing research that could prompt broader scientific discussion—though the final call rests with the IAU.

via Gizmodo|

#dwarf-planet #iau #isaacman

science3 months ago•6 min saved

Pluto Remains a Dwarf Planet, Regardless of Political Push

Barry Petchesky argues that despite Trump’s desire to have Pluto reclassified as a planet, the IAU’s 2006 definition creating the dwarf-planet category stands, and cannot be overturned by executive action or NASA funding tactics; Pluto remains scientifically a dwarf planet with a fascinating history and features, regardless of its label.

via Defector|

#dwarf-planet #iau #nasa

space3 months ago•72 min saved

Isaacman urges Pluto’s return to planet status

During a Senate budget hearing, NASA chief Jared Isaacman said he supports revisiting Pluto’s status and intends to push a proposal through the scientific community to restore Pluto to planet status, though the final decision lies with the IAU, which downgraded Pluto to a dwarf planet in 2006; New Horizons imagery of Pluto’s varied geology has fueled renewed calls from Pluto advocates, including Isaacman who took the NASA helm in December.

via Space|

#iau #isaacman #nasa

science4 months ago•6 min saved

Ten-Year-Old's Pluto Plea Triggers Four-Word NASA Reply and a Planet-Status Debate

A Tampa fourth grader wrote to NASA asking Pluto be restored to planet status, and NASA Administrator Jared Isaacman replied, “Kaela, we are looking into this.” While NASA has signaled support for reconsidering Pluto’s status, the final decision rests with the International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006 after criteria that it must clear its orbit. The story highlights a decades-long controversy over Pluto’s classification, aided by New Horizons findings of Pluto’s geology and activity and the idea that scientific labels require international consensus rather than unilateral action by any single agency.

via The Daily Galaxy|

#dwarf-planet #iau #nasa

science2 years ago•3 min saved

Astronomers Push to Redefine Planets, Pluto Still Excluded

Three astronomers have proposed a new mass-based definition of a planet that would include thousands of exoplanets, challenging the current International Astronomical Union (IAU) definition which only applies to bodies orbiting the sun. The new definition suggests that a planet should be classified based on its mass, specifically if it is lighter than 13 Jupiters, to avoid ambiguities related to shape and orbit. This proposal aims to address the limitations of the current definition and will be presented at the IAU General Assembly.

via Space.com|

#astronomy #exoplanets #iau

science2 years ago•3 min saved

Astronomers Push to Redefine Planets, Pluto Still Excluded

Scientists from UCLA propose a new definition of a planet that extends beyond our solar system, challenging the current IAU definition. Their criteria include specific mass limits and gravitational influence, aiming to provide a universal classification for celestial bodies. This new definition could clarify distinctions between planets and dwarf planets and better accommodate exoplanets.

via Earth.com|

#astronomy #exoplanets #iau