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7 votes
4 answers
3k views

How close will Pluto come to Earth this year (2024)?

For reasons associated with a 1943 story, I am keen to find how close Earth will come to Pluto in 2024. According to https://theskylive.com/pluto-tracker today (21-May-2024), Pluto is now slowly ...
Laska's user avatar
  • 187
1 vote
0 answers
72 views

How can I calculate the geocentric longitude of Pluto in a similar way to VSOP87's algorithm?

The book "Astronomical Algorithms" teaches a way to calculate the position of any of the planets for almost any date, until you get to Pluto. To try to get around that, I attempted to ...
Matheus Azevedo's user avatar
2 votes
1 answer
372 views

Moment of inertia factor of Venus and Pluto

Wikipedia's Moment of inertia factor begins: In planetary sciences, the moment of inertia factor or normalized polar moment of inertia is a dimensionless quantity that characterizes the radial ...
Majoris's user avatar
  • 545
4 votes
1 answer
243 views

How many solar system objects that can really qualify as a KBO are likely to enter Pluto's Hill sphere each day?

A comment below Which celestial body is able to come closest to Pluto? says that Technically, many, many small Kuiper belt objects enter Pluto's Hill Sphere (or sphere of influence SOI) every day. ...
uhoh's user avatar
  • 30.7k
2 votes
2 answers
2k views

When and where are Pluto and Neptune closest to each other?

I found two sources sort of answering this question, but conclusions I made of them contradict each other. https://www.reddit.com/r/askscience/comments/29jrvq/...
TStancek's user avatar
  • 175
2 votes
1 answer
2k views

Can Pluto and Neptune collide anytime in future? [duplicate]

We know that, the orbit of pluto ambiguously cuts the orbit of Neptune. I want to know, whether the revolving speed of Neptune is equal to the revolving speed of pluto. If not, is there a possibility ...
Aneek's user avatar
  • 123
16 votes
10 answers
3k views

Is Pluto still a dwarf planet?

Recent news seem to suggest that astronomers are arguing about whether Pluto should become a planet again. However, I cannot find an official source for this. Is this actually true?
user2539's user avatar
  • 185
30 votes
3 answers
6k views

Pluto's orbit overlaps Neptune's, does this mean Pluto will hit Neptune sometime?

We know that the orbits of Pluto and Neptune overlap. This means that pluto sometimes crosses the orbit of Neptune; will Pluto hit Neptune in any circumstance?
ReNiSh AR's user avatar
  • 712
8 votes
1 answer
439 views

Have Pluto or any of its moons been mapped?

I was looking over some of the data for the terrestrial planets, and noticed that Venus, despite its cloud covering, had been mapped by the Arecibo Observatory. Also that other planets such as mars, ...
Sarah Szabo's user avatar
  • 2,043
8 votes
1 answer
583 views

Effect of Charon on Pluto

Even though Pluto is not known as a planet anymore, theroetically it has/had a moon, called Charon. I've heard about something that their size are so close to each other that while Charon rotates ...
Zoltán Schmidt's user avatar