Astronomia e Ciências Espaciais 2020

luismeteo3

Furacão
Registo
14 Dez 2015
Mensagens
17,112
Local
Fatima (320m)
THE NEXT SOLAR CYCLE IS COMING: The pace of new-cycle sunspots is definitely intensifying. 2020 is only two days old, and already there is a Solar Cycle 25 active region on the sun. Provisionally numbered AR2755, the sunspot is inset in this magnetic map from NASA's Solar Dynamics Observatory:





We know that AR755 belongs to the next solar cycle because of its magnetic polarity. According to Hale’s Law, sunspot polarities flip-flop from one solar cycle to the next. During old Solar Cycle 24, we grew accustomed to sunspots in the sun’s southern hemisphere having a -/+ pattern. AR2755 is the reverse: +/-, marking it as a member of new Solar Cycle 25.

This is the 3rd consecutive month that Solar Cycle 25 sunspots have appeared: Nov. 2019, Dec. 2019, and now Jan. 2020. The quickening pace of new cycle sunspots does not mean that Solar Minimum is finished. On the contrary, low sunspot counts will likely continue for many months (and maybe even years) to come. However, it is a good sign that Solar Cycle 25 is slowly coming to life. The doldrums won't last forever!
 

Toby

Nimbostratus
Registo
25 Mar 2011
Mensagens
1,634
Local
Alcobaca (160 m)
49316579858_612f8163c7_z.jpg


https://www.solarchatforum.com/viewtopic.php?f=4&t=27072
https://www.solarchatforum.com/viewtopic.php?f=4&t=27066
 

Toby

Nimbostratus
Registo
25 Mar 2011
Mensagens
1,634
Local
Alcobaca (160 m)

Pequena precisão (astrofotografia é outra das minhas paixões)
Esta noite no céu português você vai observar estrelas cadentes, uma pequena parte irá em direção à terra, uma parte será auto-consumida na entrada da atmosfera.
Os meteoritos são aqueles que atingirão as altas altitudes atmosféricas em estado sólido, não gasoso.
Por isso, esta noite será mais provável que veja estrelas cadentes do que meteoritos. (repórter precisa de uma aula de astrofísica :))
 

Toby

Nimbostratus
Registo
25 Mar 2011
Mensagens
1,634
Local
Alcobaca (160 m)
  • Gosto
Reactions: Thomar e luismeteo3

Orion

Furacão
Registo
5 Jul 2011
Mensagens
19,551
Local
Açores
  • Gosto
Reactions: luismeteo3

Dias Miguel

Cumulonimbus
Registo
26 Jan 2015
Mensagens
2,309
Local
Portalegre
  • Gosto
Reactions: StormRic