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。

 

 

 

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所有跟帖： 

• 拍照时需要加个FILTER吗？ -永远老李- ♂ (0 bytes) () 06/30/2023 postreply 06:29:25

• 没加，早上太阳刚刚升起，见内 -xia23- ♂ (81 bytes) () 06/30/2023 postreply 07:48:34

• 确定不是镜头脏了吗？ -京男- ♂ (244 bytes) () 06/30/2023 postreply 10:42:57

• 哈哈 -永远老李- ♂ (0 bytes) () 06/30/2023 postreply 11:07:47

• 这是傻瓜机，镜头不能换的。单反机，镜头能换，sensor上可能落灰尘。sensor上的灰尘会在照片上留下黑点。镜头上的灰 -xia23- ♂ (150 bytes) () 06/30/2023 postreply 11:47:57

• 谢谢大家。 -xia23- ♂ (0 bytes) () 06/30/2023 postreply 15:31:30

• 我家Sony 长焦600mm, 怎么能照星空啊？我老公不爱管我，可我想照 -无法弄- ♀ (0 bytes) () 06/30/2023 postreply 23:32:10

• 对不起，把回答放错地方了，见下面的“见内”。 -xia23- ♂ (32 bytes) () 07/01/2023 postreply 07:32:23

• 见内 -xia23- ♂ (2321 bytes) () 07/01/2023 postreply 07:17:35