What are these ghostly circles out in space ?

[UM-Bot 10,984]

Astronomers have been attempting to explain a strange phenomenon involving ghostly circular 'smoke rings'.

https://www.unexplained-mysteries.com/news/342301/what-are-these-ghostly-circles-out-in-space

[third_eye 55,813]

My guess is space gas out of Uranus... 

~

[diddyman68 2,504]

2 hours ago, third_eye said:

My guess is space gas out of Uranus... 

~

Any space jokes involving uranus is funny in my book.

[jethrofloyd 5,426]

Aliens smoking cigarettes?

[South Alabam 10,237]

Plasma ball or something Star Trek needs to check out.

[Seti42 1,632]

Space Bigfoot or Yog-Sothoth are my votes.

[jethrofloyd 5,426]

4 minutes ago, Seti42 said:

Space Bigfoot

[Damien99 61]

I smell trouble lol

[diddyman68 2,504]

2 hours ago, Damien99 said:

I smell trouble lol

That'll be the gas from uranus.

[Twin 150]

The radio bubble around a star with intelligent life broadcasting urgent news about the Kardashians !!

[Hammerclaw 31,568]

Warp bubble.

[johncbdg 173]

21 hours ago, UM-Bot said:

Astronomers have been attempting to explain a strange phenomenon involving ghostly circular 'smoke rings'.

https://www.unexplained-mysteries.com/news/342301/what-are-these-ghostly-circles-out-in-space

Poisonous gas cloud, keep away from it 

https://www.bing.com/images/search?view=detailV2&ccid=FPyuTamN&id=32A65C3A8254244EA95ED179714D7BEFF6B4AAF1&thid=OIP.FPyuTamN_6HeieQt61HeRgAAAA&mediaurl=http%3a%2f%2fxtopherjacques.files.wordpress.com%2f2013%2f07%2fpoison-gas-cloud.jpg&exph=256&expw=320&q=Poison+Gas+Cloud&simid=607990627441970937&ck=1044E843ED57B90DFE26EEEAF59D5EFF&selectedIndex=4&FORM=IRPRST&ajaxhist=0

[childofindigo 8]

distant multiverse?

[Peter B 3,867]

I like the fact that the astronomer in the article linked in the OP called them WTFs. I think the challenge for astronomers now is that, once they work out what the phenomena are, they need to find a name for them which also has the acronym WTF.