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]
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
(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。更多我的博客文章>>>
和马蜂掐了一架，鞋，花 黑色的蚕豆花，几个问题，几朵花等等 Extracts translated from a German book “Tschick” 父亲节给自己买的书，还有26本中文书没到呢 一本书里的”父亲的饭盒“我看到更多的黑点。 挪了挪图才发现， 屏幕不干净。
Jupiter & Saturn with a 600mm Lens - Sigma 150-600mm Contemporary & Canon M6 II
Jupiter （from the link above)：
Saturn (from the link above)：
怎样发现行星，Planets in July sky:
https://earthsky.org/astronomy-essentials/visible-planets-tonight-mars-jupiter-venus-saturn-mercury/
我的setup.
相机，镜头，三角架，注意要把镜头装在三脚架上，不是把相机装在三脚架上，要用快门线或遥控器，不要用手按快门, 曝光用光圈优先，把光圈放到镜头最大（f值最小）：
三脚架，要结实一点的（我的这个是$210,sale时买的，应该买更贵一些的，是铝的，重。买碳纤维的，贵，轻），我的这个头不太方便，得控制3个把手。
这种头只用一个钮，方便：
我照的月亮：
我照的月食，曝光时间太长，地球月亮动，照片模糊：