今天早上拍到的太阳黑子

(请注意，照太阳的照片只能在太阳刚升起于地平线或快落山的时候照，千万别在其它时间照。那时的太阳可以让你永远失明）。

今天早上，看到升起的太阳，照了几张照片，发现sun spots:

相机是Nikon Coolpix A900 at 35x

On 3/15/2009, I had an entry on sun spots:

https://blog.wenxuecity.com/myblog/40376/200903/24486.html 

什么是太阳黑子:

https://en.wikipedia.org/wiki/Sunspot

Sunspots are phenomena on the Sun's photosphere that appear as temporary spots that are darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. Sunspots appear within active regions, usually in pairs of opposite magnetic polarity.^[2] Their number varies according to the approximately 11-year solar cycle.

Individual sunspots or groups of sunspots may last anywhere from a few days to a few months, but eventually decay. Sunspots expand and contract as they move across the surface of the Sun, with diameters ranging from 16 km (10 mi)^[3] to 160,000 km (100,000 mi).^[4] Larger sunspots can be visible from Earth without the aid of a telescope.^[5] They may travel at relative speeds, or proper motions, of a few hundred meters per second when they first emerge.

Indicating intense magnetic activity, sunspots accompany other active region phenomena such as coronal loops, prominences, and reconnection events. Most solar flares and coronal mass ejections originate in these magnetically active regions around visible sunspot groupings. Similar phenomena indirectly observed on stars other than the Sun are commonly called starspots, and both light and dark spots have been measured.^[6]

前几天微信上报道太阳黑子on 6/28/2023:

https://www.google.com/search?q=recent+sun+spot+activity&rlz=1C1IHCB_enUS722US729&oq=recent+sun+spot&aqs=chrome.0.0i512j69i57j0i512j0i22i30l7.10471j1j7&sourceid=chrome&ie=UTF-8

Last 24 hours: Sun activity is back to low levels. Only C flares were produced in the past day (11 UTC yesterday and 11 UTC today). There were a total of 14 C flares during the period. The largest was a C5.5 flare from sunspot AR3354 at 18:39 UTC on June 28, 2023.2 days ago

谢谢观看。

 

所有跟帖： 

• 哇，照得好清楚！你这个相机照过月亮吗？效果如何？ -日月茗- ♀ (0 bytes) () 06/30/2023 postreply 04:57:00

• 我没有用这个相机照过月亮，我用过Nikon D70和sigma 50-500mm j镜头照过，我找到相片后贴上。我哪天照 -xia23- ♂ (443 bytes) () 06/30/2023 postreply 05:23:32

• 月食 （9/26/2007）taken by Nikon D70 & Sigma 50-500 mm lens -xia23- ♂ (81 bytes) () 06/30/2023 postreply 05:40:32

• moon (12/10/2006), Nikon D70, Sigma 50-500 mm lens -xia23- ♂ (81 bytes) () 06/30/2023 postreply 05:48:59

• 很棒！你这照太阳黑子的，难道没用三脚架？ -日月茗- ♀ (0 bytes) () 06/30/2023 postreply 06:24:21

• 第三张（时间最早）没有用，但我的身体背倚着墙。第一二张用了。我以后几天再试试。 -xia23- ♂ (493 bytes) () 06/30/2023 postreply 07:37:05

• 瓦。150mm傻瓜机还能照出黑子，厉害。用什么filter？ -位酷哥- ♂ (0 bytes) () 06/30/2023 postreply 06:09:08

• 没用。150 mm 的傻瓜相当于840 mm的 35 mm相机的镜头，见内： -xia23- ♂ (315 bytes) () 06/30/2023 postreply 07:43:52

• 厉害了. -青柏- ♀ (0 bytes) () 06/30/2023 postreply 08:31:16

• 不厉害，傻瓜机照的，加个三角架，谁都能照。请一定注意：只能在太阳刚升起后一会儿和落山前一会儿照，其它时间会使人失明。 -xia23- ♂ (0 bytes) () 06/30/2023 postreply 10:01:00

• 牛人 -Duckmaster- ♂ (0 bytes) () 06/30/2023 postreply 09:14:55

• 不是牛人，傻瓜机照的，加个三角架，谁都能照。请一定注意：只能在太阳刚升起后一会儿和落山前一会儿照，其它时间会使人失明。 -xia23- ♂ (0 bytes) () 06/30/2023 postreply 10:03:23

• 现在的傻瓜机居然能有这样的效果，真不错 -杏梨桃李- ♀ (0 bytes) () 06/30/2023 postreply 10:19:00

• 还有更好的傻瓜机, 比我的贵很多, 24-3000mm lens -xia23- ♂ (3596 bytes) () 06/30/2023 postreply 11:24:39

• 好厉害 -每天砍树- ♀ (0 bytes) () 06/30/2023 postreply 13:02:47

• 不厉害，傻瓜机照的，加个三角架，谁都能照。请一定注意：只能在太阳刚升起后一会儿和落山前一会儿照，其它时间会使人失明。 - -xia23- ♂ (0 bytes) () 06/30/2023 postreply 15:23:11

• 谢谢大家。 -xia23- ♂ (0 bytes) () 06/30/2023 postreply 15:26:11