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Planets

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Janet H
1243347.  Mon Jul 24, 2017 4:54 pm Reply with quote

Never mind how many Moons the Earth has, how many planets does the sun have?

 
tetsabb
1243371.  Tue Jul 25, 2017 4:44 am Reply with quote

Creak, creak, slither
(The sound of a can of worms being opened)

OK, I'll bite.
Pluto got relegated a few years back. So eight.
However, the hunt is on for so-called Planet 9, somewhere out in the Kuiper belt.
But I have seen/heard rumblings that there be yet another, even further out. Chilly.
So I will go for 10, but am willing to change my view in light of better evidence.

<<Awaits klaxon

 
Janet H
1243387.  Tue Jul 25, 2017 8:59 am Reply with quote

Personally I'd go with a 'Nobody knows', because the current definition is possibly open to human interpretation and beyond Neptune there's all sorts of big rock.



Wiki gives a good introduction to the controversies surrounding the issue.https://en.wikipedia.org/wiki/Definition_of_planet

 
tetsabb
1243409.  Tue Jul 25, 2017 12:54 pm Reply with quote

I thought they all count as planetesimals, or dwarves, as they have not cleared their orbits of other material, and that was one of the crucial factors in defining a proper, grown-up planet.

 
crissdee
1243421.  Tue Jul 25, 2017 3:38 pm Reply with quote

Janet H wrote:
Personally I'd go with a 'Nobody knows', because the current definition is possibly open to human interpretation


Errrrr..... there's no "possibly" about it. It can only ever be human interpretation. Who else do you know about that has a say in it?????

 
DVD Smith
1243995.  Mon Jul 31, 2017 12:27 pm Reply with quote

One thing that is a definite "nobody knows" is why Saturn's north pole has a cloud pattern in the shape of a perfect hexagon. During observation it also changed in colour from bright blue to gold, and again, nobody knows why.

https://en.wikipedia.org/wiki/Saturn%27s_hexagon

A great P-subject for discussion is of course Pluto, which has had so much discovered about it in the last two years that I almost want to make a separate thread for it.

 
gruff5
1244217.  Wed Aug 02, 2017 5:56 am Reply with quote

Janet H wrote:




What on Earth is going on with 2003 EL61?! Is it made of liquid nitrogen and spinning at a very fast rate?

 
PDR
1244219.  Wed Aug 02, 2017 6:16 am Reply with quote

Janet H wrote:
Never mind how many Moons the Earth has, how many planets does the sun have?


None, because having planets implies possession, and property is theft.

PDR

 
Dix
1266968.  Sat Dec 16, 2017 1:09 pm Reply with quote

A bit tenuous, but I just found out that two books published by Tycho Brahe in the late 1500s are being digitized and are to be made available online. Plus they are planning a "what did Tycho Brahe observe on this date" where you can look up his actual observations.

There's bound to be planets in it.


To be launched in February 2018.
Watch this space.

Source: https://www.dr.dk/nyheder/regionale/fyn/astronom-faar-lov-kigge-tycho-brahe-over-skulderen

 
tetsabb
1271489.  Sun Jan 21, 2018 12:13 pm Reply with quote

I wonder if post 1271440 might provide some entertaining banter, especially if panellists included denizens of either Canada or God's own county.
I can just imagine Sandi's face if she said, "Readers were asked what their ideal planet would be like.
One replied, 'Like Yorkshire'"

 
Spud McLaren
1271520.  Sun Jan 21, 2018 3:51 pm Reply with quote

Now, "Like a Yorkshire [pud]", I could go with.

 
crissdee
1271526.  Sun Jan 21, 2018 4:21 pm Reply with quote

Would that have an enormous crater filled with gravy?

 
Spud McLaren
1271534.  Sun Jan 21, 2018 4:50 pm Reply with quote

No, because then you probably wouldn't want to put jam on it.

 
tetsabb
1271572.  Mon Jan 22, 2018 7:07 am Reply with quote

Jam on a Yorkshire pud?
Heretic!!!

 
ali
1271579.  Mon Jan 22, 2018 8:01 am Reply with quote

gruff5 wrote:
What on Earth is going on with 2003 EL61?! Is it made of liquid nitrogen and spinning at a very fast rate?


It is now known as Haumea, and it has a rotational period of slightly under 4 hours.

 

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