Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Prominence question

  • Please log in to reply
1 reply to this topic

#1 dhkaiser

dhkaiser

    Explorer 1

  • -----
  • topic starter
  • Posts: 52
  • Joined: 23 Dec 2019

Posted 11 January 2020 - 09:12 AM

New to solar observing question.  The prominence on the NE limb has been visible for  days.  I witnessed a huge outgassing a couple days ago.  Does that mean it has been huge but mostly hidden by the limb?



#2 sg6

sg6

    Fly Me to the Moon

  • *****
  • Posts: 6,885
  • Joined: 14 Feb 2010
  • Loc: Norfolk, UK.

Posted 11 January 2020 - 09:34 AM

I expect the answer is the rather useless: It could have been.

Prominence's seem to be gas, more correct plasma, held in a magnetic loop, so if the magnetic loop has existed for a few day then yes it will rotate into view.

 

It could as equally last shorter in time and so has appeared at a convenient time - hence the useless "could have been".

 

At either end should be a "sun spot" where the magnetic field(s) exit the sun, but visibility will depend on the temperature of the spot, not all have a great temperature difference, and for the distances involved the prominence needs to be big to get sufficence separation. Suppose the prominence itself could also mask/cover any sun spot from our view




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics