It's not impossible to imagine a future, though, where astronomers discover a large enough object in the distant Solar System that could qualify for planethood status. Then our Solar System would have 9 planets again. Even though Pluto is a dwarf planet, and no longer officially a planet, ...
Pluto, officially a dwarf planet, has surprising complexity on its surface. While certainly a world, not everyone agrees it is a planet.
The International Astronomical Union (IAU), the body that is responsible for naming and classifying objects in the cosmos, has just announced that Pluto has been reclassified as a major planet. That's right, the little dwarf will be rejoining the ranks of Mercury, Venus, Earth, Mars, ...
In the center-left of Tombaugh Regio is a very smooth region unofficially known by the New Horizons team as "Sputnik Planum," after Earth's first artificial satellite,Sputnik. This region of Pluto's surface lacks craters caused by meteorite impacts, suggesting that the area is, on a geologic...
Again this illustrates that planetary bodies from a geophysical perspective includes more than just the IAU planets. Comparative planetology will include planets, dwarf planets and spheroidal moons. And the IAU definition will not stop researchers from referring to the planetary nature of these bodies....
It's somewhat ironic that a 2002 paper of his (and Levison) on the dynamic definition provided a major boost to start the SCIENTIFIC process that ultimately resulted in Pluto being OFFICIALLY declared as "not a planet". "Stern and Levison (2002) remarked that some bodies in the solar system...
first flyby of Mars, another plan-et, which was completed by NASA's Mariner 4 space-ship.There are no longer nine officially recognized planets,of course The International Astronomical Union regardedPluto as “adwarf planet” in 2006 in a decision that re-mains controversial(有争议的)today.1...
Since the recording of this show, dwarf planet 2003 UB313 has been officially named Eris, and its moon is Dysnomia Transcript Transcript: Pluto’s Planetary Identity Crisis Download the transcript Fraser Cain: If we talked to any astronomer, anyone in the space industry this last couple of mo...
They got knocked down again; they stood up again.” In a coincidence, today's close approach falls on the 50th anniversary of the first flyby of Mars, another planet, which was completed by NASA-s Mariner 4 spaceship. There are no longer nine officially recognized planets, of course. The...
The proposal redefined a "planet" as a round object that has never experienced fusion (unlike a star); the definition is expected to encompass not only dwarf planets, but also moons. Officially, Pluto is still considered a dwarf planet as of late 2021. Arrokoth (2014 MU69) flyby ...