/sci/ - Science & Math

>>12136626
It was either count all these other little bitch ice rocks as planets or define a new-category of objects. The latter makes the most sense since they are a pretty distinct group.

>>12136626
Pluto never should have been considered a planet. When it was first discovered, it was thought to be significantly larger than it turned out to be. By the time that was discovered, everyone had already accepted it as a planet and no one had the courage to admit a mistake had been made.

>>12136709
that sums up science pretty well

other posters arent entirely right, our understanding and ability to see objects has exponentially increased and we felt the need to put a line in the sand and have either 2000 planets or redefine what it means, namely the vacuum cleaner effect or whatever it was

if pluto had the exact same orbit but it didnt go near 50 trillion objects on it's journey around the sun we might be calling it a planet, even if it went into neptunes orbit some

>>12136691
Holy shit, I remember quaoar and sedna, I didn't know there were so many known now. Aren't all of these considered to be oort bodies?

>>12136971
Science advances one retirement at a time.

>>12136626
It's rounded and is the most massive component of the Pluto/Charon system whose barycenter orbits the sun.

>>12136691
Maybe if they didn't give them shitty names it wouldn't be so unreasonable

Haemea is a bullshit appeasement name to butter up natives that will NEVER change their mind about telescopes on the mountain. They don't care about these bodies.

The fuck is makemake? Sounds like a garbage binned alternative name for play-doh

>>12137409
Why can you get forced to sell your property for a decent price by the government for a highway when people are allowed to just squat on unique real estate?

>>12136626
I thought ridley blowed up Ceres when >>12136691
he stole the baby from metroid?

Ceres was considered a planet when it was first discovered, not sure why they changed their mind on that.

>>12136691
Based Eris, fucking things up for everyone forever on a lark.

>>12136626
"arguing about words"

>>12136626
What are real colors of Pluto?
This image looks color enhanced.

>>12137544
New horizon didn't have a color camera. Pic related is from Hubble with some smoothing done, the original picture is like an 8 bit sprite.

>>12136691
can't it be honorary planet just for historical reason?

>>12137544

>>12136626
The thing I don't get though is that in the technical divisions between planet and dwarf planet, the one thing Pluto and Eris fail in that make them d.planets are things that Neptune and even Earth fail to pass. Pluto is a dwarf planet because it has not yet cleared its orbit of all foreign bodies (Neptune). Likewise, Neptune hasn't yet cleared its orbit of all foreign bodies (Pluto).

I understand the motivation behind wanting to separate them, but the actual rules they announced to divide them seem to have failed in their task from day 1. Either Pluto is a planet because Neptune is a planet, or both aren't planets.

>>12138030
>Some astronomers counter this opinion by saying that, far from not having cleared their orbits, the major planets completely control the orbits of the other bodies within their orbital zone. Although Jupiter does coexist with a large number of small bodies in its orbit (the Trojan asteroids), these bodies only exist in Jupiter's orbit because they are in the sway of the planet's huge gravity. Earth accretes or ejects near-Earth asteroids on million-year time scales, thereby clearing its orbit. Similarly, Pluto may cross the orbit of Neptune, but Neptune long ago locked Pluto and its attendant Kuiper belt objects, called plutinos, into a 3:2 resonance (i.e., they orbit the Sun twice for every three Neptune orbits). Since the orbits of these objects are entirely dictated by Neptune's gravity, Neptune is therefore gravitationally dominant.[48]

>>12138036
That's a much better definition. However, that doesn't change the IAU's requirement of "clearing the neighbourhood" around the orbit. Have there been talks of adjusting the definition, or is it just settled that they'll keep the contradictory language and argue semantics from "some astronomers" on the side?

>>12138036
>Earth accretes or ejects near-Earth asteroids on million-year time scales, thereby clearing its orbit.
I'm not sure what this means though. There's a lot of near-Earth asteroids, some intersecting with possible collision, some intersecting with impossible collision. How does Earth pass while something like Eris, which is not a plutino nor influenced by Neptune's gravity, doesn't? I feel like rather than vague language about neighborhood, the rule should have focused on the orbit. Pluto and Eris both orbit the sun (which passes them as a planet) yet they do so very irregularly (no impact on designation as a planet) compared to the eight we have.

>>12138072
woops, forgot the list of asteroids that intersect Earth, which technically disqualifies us as a planet.
https://en.wikipedia.org/wiki/List_of_Earth-crossing_minor_planets

>>12136626
>so they changed the rules?
You sound extremely underage. They changed the Definition, not the rules.

>>12137529
good post

>>12136626
Because it lacks hard core!

>>12136691
what's Haumea's problem?

>>12137325
No, those are all in the Kuiper belt or scattered disc. The only Oort cloud bodies we know of are long-period comets that come into the inner solar system.

>>12140384
Fast rotation (4 hours per day) turned it into a potato. Not sure about the ring. It would probably be the most kino dwarf planet.

>>12140415
It is actually a star egg

>>12140857
What is a star egg?

>>12137538
Same reason as Pluto; they original thought it was the only object in between Mars and Jupiter. Then people started noticing literally thousands of asteroids in the same region and the entire thing was labeled the asteroid belt for convenience.

>>12140860
When a Mommy Star and a Daddy Star love each other very much...

>>12140934
They hire a black hole Tyrone and he fucks big and makes cums and mommy lays big black eggs!

>>12141082
And that's why dwarf planets are usually abandoned in the Oort Cloud.

>>12137541
>classification is meaningless pedantry
>taxonomy is meaningless pedantry

>>12141424
yes
FUCK taxonomy autists jesus christ botanists need to fucking chill out and take their autism pills