Join Leah and Chelsea as they belatedly mourn the loss of Pluto as a planet. Guests Kathryn Volk and Konstantin Batygin discuss various approaches to boosting Pluto's status, including increasing its mass and dragging it into the inner solar system. They also explore reimagining Pluto's planetary status by dropping a black hole inside it or physically moving it. The podcast also touches on the stability of Pluto and the potential consequences of a close gravitational encounter with Neptune.
Pluto was classified as a dwarf planet because it failed to clear its orbit of other large objects.
Increasing Pluto's mass to a tenth of Earth's mass may help it regain its planet status.
Deep dives
Can Pluto be made a planet again?
The podcast explores the debate surrounding Pluto's status as a planet, with the hosts and experts discussing the requirements set by the International Astronomical Union (IAU) for a celestial body to be considered a planet. The experts explain that Pluto was classified as a dwarf planet due to its failure to clear its orbit of other large objects. The hosts express their desire to make Pluto a planet again and discuss potential methods, such as increasing its mass or moving it to the inner solar system. However, they acknowledge the challenges and instabilities associated with these approaches.
Adding mass to Pluto and the Kuiper Belt
The episode delves into the possibility of increasing Pluto's mass to make it a planet again. The experts explain that based on quantitative research, Pluto would need to reach about a tenth of Earth's mass to clear its orbit. They also discuss the mass of the Kuiper Belt and the challenges of gathering enough mass to add to Pluto. The hosts brainstorm ideas like colliding Kuiper Belt objects with Pluto, but caution that the collisions would need to be gentle to create a merger, and the process would likely require a significant amount of time to avoid evaporating too much of Pluto's ice.
Modifying the solar system and relocating Pluto
The podcast explores the idea of modifying the solar system's dynamics to make Pluto a planet again. The hosts and experts discuss decreasing the Sun's mass to shift the balance of gravitational forces, allowing Pluto to occupy an orbit where it can clear its orbit more easily. They consider the potential effects on other planets like Mercury and the stability of the inner solar system during this process. Additionally, they entertain the idea of physically moving Pluto to a new location between Venus and Earth, where it could more effectively clear its orbit. They also ponder the consequences of such actions, including the sublimation of Pluto's surface ice and the potential formation of a vigorous atmosphere.
Join Leah and Chelsea as they belatedly mourn the loss of Pluto as a planet. Back in 2006, Pluto was demoted to “dwarf planet”, sparking widespread outrage… a decision the team is still determined to reverse.
Special guests are Kathryn Volk of the University of Arizona and Konstantin Batygin of the California Institute of Technology, who discuss several approaches to boosting Pluto’s status, from helping it pack on the pounds, to dragging it into the inner solar system, to sabotaging one of its neighbours…
Dead Planets Society is a podcast that takes outlandish ideas about how to tinker with the cosmos – from punching a hole in a planet to unifying the asteroid belt to destroying the sun – and subjects them to the laws of physics to see how they fare.
If you have a cosmic object you’d like to figure out how to destroy, email the team at deadplanets@newscientist.com. It may just feature in a later episode… And if you just want to chat about this episode or wrecking the cosmos more generally, tweet @chelswhyte and @downhereonearth.