The Astronomy Thread

Kharzette

Kharzette

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This is confusing:
The two gas giants orbit their host star at distances of 160 and about 320 times the Earth-Sun distance. This places these planets much further away from their star than Jupiter or Saturn, also two gas giants, are from the Sun; they lie at only 5 and 10 times the Earth-Sun distance, respectively.
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So are they 5 to 10AU out or 160 to 320? Also 17 million years doesn't even seem long enough for planets to form? Should still be a dusty disc I'd think?
 
iannis

iannis

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I'm fairly sure their orbits are further out than pluto.

I did read a thing I barely remember that we may have planets orbiting past the past the oort cloud. Captures which account for comets, but don't have a discernable impact on the orbits of our named planets.
 
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Kharzette

Kharzette

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Surprised a yellow G can get something that far away so hot. I'll bet they migrated out
 
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Araxen

Araxen

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iannis said:
I'm fairly sure their orbits are further out than pluto.

I did read a thing I barely remember that we may have planets orbiting past the past the oort cloud. Captures which account for comets, but don't have a discernable impact on the orbits of our named planets.
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I watched some YouTube video that said there should be a 9/10th planet. I guess just like Neptune, there is math that predicts there is one. We just haven't found it yet.
 
Mudcrush Durtfeet

Mudcrush Durtfeet

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Araxen said:
I watched some YouTube video that said there should be a 9/10th planet. I guess just like Neptune, there is math that predicts there is one. We just haven't found it yet.
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I imagine the math only suggests there is one; if a large planet is out there and we had an accurate location, we'd find it. If it is actually so far out there that we COULDN'T find it (ie Oort cloud) it also wouldn't be possible to use math to determine where it is.
 
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Tholan

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20200719-DXB_7490s.jpg

went last saturday to try and check it. Damn I'm bad at this, took me half a bilion tries to focus my damn camera, couldn't see shit in the dark and every time I searched something with my torchlight I went blind for half an hour. Plus it was fucking 5°C. And I couldnt find my tripod so I had to use a 20$ one that was probably made by someone who had parkinson. Pretty sure the cows were laughing at us.
Fun times however, it's not something you see everyday.
 
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Cybsled

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Mudcrush Durtfeet said:
I imagine the math only suggests there is one; if a large planet is out there and we had an accurate location, we'd find it. If it is actually so far out there that we COULDN'T find it (ie Oort cloud) it also wouldn't be possible to use math to determine where it is.
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If it had a wonky orbit like Pluto, but much farther out, that would no doubt make it much harder to find. Especially if it had some type of wacky super orbital time measured in millennia. Pluto takes centuries to complete 1 orbit.
 
Brahma

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Tholan said:
View attachment 287655
went last saturday to try and check it. Damn I'm bad at this, took me half a bilion tries to focus my damn camera, couldn't see shit in the dark and every time I searched something with my torchlight I went blind for half an hour. Plus it was fucking 5°C. And I couldnt find my tripod so I had to use a 20$ one that was probably made by someone who had parkinson. Pretty sure the cows were laughing at us.
Fun times however, it's not something you see everyday.
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I'd seriously considering framing that. Nice job.
 
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MusicForFish

MusicForFish

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Araxen said:
I watched some YouTube video that said there should be a 9/10th planet. I guess just like Neptune, there is math that predicts there is one. We just haven't found it yet.
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They're suggesting it's our systems dead companion star instead of a planet.
 
Cybsled

Cybsled

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For it to be so dead that it is a black dwarf seems off...you’re talking a white dwarf that totally burned out already, but our sun is still main sequence? A large planet that got flung into an odd orbit early in the solar systems history seems more likely.
 
Mudcrush Durtfeet

Mudcrush Durtfeet

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Cybsled said:
For it to be so dead that it is a black dwarf seems off...you’re talking a white dwarf that totally burned out already, but our sun is still main sequence? A large planet that got flung into an odd orbit early in the solar systems history seems more likely.
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The universe isn't old enough to have any black dwarfs.
 
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meStevo

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Propellent loading now, could be a static fire on SN5 tonight. Could see a hop next week.

Edit: tonights atttempt was aborted


 
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Merrith

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Cybsled said:
If it had a wonky orbit like Pluto, but much farther out, that would no doubt make it much harder to find. Especially if it had some type of wacky super orbital time measured in millennia. Pluto takes centuries to complete 1 orbit.
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I thought i had read somewhere it could be a large planet, but with an orbit that could be somewhere between 150-300 AU (for ref, Neptune is 30 AU and Pluto at its furthest is just under 50 AU). That would be fairly difficult to find I would assume.
 
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