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NASAHickson 44 in Leo <a href="https://apod.nasa.gov/apod/ap250404.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250404.html</a> <a href="https://social.beachcom.org/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

小太阳君<a href="https://b612.me/tags/APoD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APoD</a> <a href="https://b612.me/tags/%E6%AF%8F%E6%97%A5%E4%B8%80%E5%9B%BE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#每日一图</a> <a href="https://b612.me/tags/2025%E5%B9%B404%E6%9C%8804%E6%97%A5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#2025年04月04日</a>狮子座的致密星系群Hickson 44 在天空中找寻星系时，加拿大天文学家希克森（Paul Hickson）和他的同事，找到100个左右的紧实星系群，因此它们有希克森致密星系群之称。 于这片望远镜视野里，最吸睛的4个星系所组成的Hickson 44，是在狮子座方向的带芒银河系前景恒星后方，约1亿光年远处的致密星系群范例。 影像中心的2个螺旋星系，分别是拥有扭曲尘埃带的侧向NGC 3190及S形的NGC 3187。 与这二个星系为伴、位于它们左上方的，则是明亮的椭圆星系NGC 3193，而三者合起来亦称为Arp 316。 影像右下角的螺旋星系NGC 3185，则是Hickson 44的第四个成员。 如同其他希克森致密星系群，成员星系扭曲的外观及升高的恒星诞生活动，皆是受重力扰动的迹证，而在经过长长的宇宙尺度时间之后，终将导致星系合并。 这种星系合并现象，现在咸认是星系演化的正常过程，而我们的银河系自然也不例外。 作为量度尺标，以Hickson 44的估计距离来换算，星系NGC 3190的宽度约为75,000光年。

Astroland 🔭Astronomie foto van de dag: Hickson 44 in Leo. Fotoinfo: <a href="https://apod.nasa.gov/apod/ap250404.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250404.html</a> Foto Credits: Jiang Wu <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomie</a> <a href="https://mastodon.social/tags/sterrenkunde" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkunde</a> <a href="https://mastodon.social/tags/sterrenkijken" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkijken</a> <a href="https://mastodon.social/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#apod</a> <a href="https://mastodon.social/tags/heelal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heelal</a>

Khurram Wadee ✅<a href="https://mastodon.org.uk/tags/Hickson44" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Hickson44</a> in <a href="https://mastodon.org.uk/tags/Leo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Leo</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250404.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250404.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

Astronomy Picture of the DayHickson 44 in Leo Image Credit & Copyright: Jiang Wu <a href="https://apod.nasa.gov/apod/ap250404.html" rel="nofollow noopener noreferrer" target="_blank">https://apod.nasa.gov/apod/ap250404.html</a> <a href="https://reentry.codl.fr/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

NASAThe Da Vinci Glow <a href="https://apod.nasa.gov/apod/ap250403.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250403.html</a> <a href="https://social.beachcom.org/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

小太阳君<a href="https://b612.me/tags/APoD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APoD</a> <a href="https://b612.me/tags/%E6%AF%8F%E6%97%A5%E4%B8%80%E5%9B%BE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#每日一图</a> <a href="https://b612.me/tags/2025%E5%B9%B404%E6%9C%8803%E6%97%A5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#2025年04月03日</a>达文西灰光 在这幅暮色时分的山景与夜空影像里，月龄26小时的新月，低悬在意大利多罗迈山脉嶙峋的轮廓后方。 这张1秒长曝光影像，则是摄于3月30日的月落时分。 当时，尽管月亮只有一抺银白区受到阳光的直射，然而朝著地球的正面，在明亮地球反射光的照耀下，其余的区域皆可见。 这种现象称为地照或月球灰光。 500多年前，达文西就曾描述过这种现象，并解释其成因为“地球海洋所反射的阳光，能够微微照亮月球的夜面”。 当然，行星反射的光都会微微照亮其卫星的夜面，因此地照只是行星照中最广为人知的例子。

Khurram Wadee ✅The <a href="https://mastodon.org.uk/tags/DaVinciGlow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DaVinciGlow</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250403.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250403.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a> <a href="https://mastodon.org.uk/tags/Italy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Italy</a> <a href="https://mastodon.org.uk/tags/Dolomites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Dolomites</a>

Astroland 🔭Astronomie foto van de dag: The Da Vinci Glow. Fotoinfo: <a href="https://apod.nasa.gov/apod/ap250403.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250403.html</a> Foto Credits: Giorgia Hofer <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomie</a> <a href="https://mastodon.social/tags/sterrenkunde" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkunde</a> <a href="https://mastodon.social/tags/sterrenkijken" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkijken</a> <a href="https://mastodon.social/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#apod</a> <a href="https://mastodon.social/tags/heelal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heelal</a>

Astronomy Picture of the DayThe Da Vinci Glow Image Credit & Copyright: Giorgia Hofer <a href="https://apod.nasa.gov/apod/ap250403.html" rel="nofollow noopener noreferrer" target="_blank">https://apod.nasa.gov/apod/ap250403.html</a> <a href="https://reentry.codl.fr/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

NASAJupiter and Ring in Infrared from Webb <a href="https://apod.nasa.gov/apod/ap250402.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250402.html</a> <a href="https://social.beachcom.org/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

小太阳君<a href="https://b612.me/tags/APoD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APoD</a> <a href="https://b612.me/tags/%E6%AF%8F%E6%97%A5%E4%B8%80%E5%9B%BE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#每日一图</a> <a href="https://b612.me/tags/2025%E5%B9%B404%E6%9C%8802%E6%97%A5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#2025年04月02日</a>韦伯影像：红外光波段的木星与木星环 为何木星有环系呢？ 航行者1号太空船于1979年路过木星之时，发现了木星的主环，然而它的起源在当时是个谜。 后来从1995年到2003年之间绕行木星的伽利略号太空船回传的资料中，方才确认这个环是因为流星体撞击行星环附近的小卫星所产生。 例如：当小流星体撞击娇小的木卫十六（Metis）时，会在穿透卫星表面后才汽化爆炸，将土和尘埃扬入绕行木星的轨道里。 这幅由韦伯太空望远镜摄于红外光波段的木星主题影像，除了呈现木星及其云层之外，也突显了它的行星环。 在影像里，可见右侧以淡斑之姿现身的木星大红斑（GRS）、木星的大卫星木卫二（位于左侧衍射芒的中心）、及大红斑左方的木卫二之影子。 影像里还有数个尚未全然了解的特征，其中包括木星右侧邻边上，看似与木星明显分离的云层。

Astroland 🔭Astronomie foto van de dag: Jupiter and Ring in Infrared from Webb. Fotoinfo: <a href="https://apod.nasa.gov/apod/ap250402.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250402.html</a> <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomie</a> <a href="https://mastodon.social/tags/sterrenkunde" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkunde</a> <a href="https://mastodon.social/tags/sterrenkijken" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sterrenkijken</a> <a href="https://mastodon.social/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#apod</a> <a href="https://mastodon.social/tags/heelal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#heelal</a>

Khurram Wadee ✅<a href="https://mastodon.org.uk/tags/Jupiter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Jupiter</a> and <a href="https://mastodon.org.uk/tags/Ring" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Ring</a> in <a href="https://mastodon.org.uk/tags/Infrared" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Infrared</a> from <a href="https://mastodon.org.uk/tags/Webb" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Webb</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250402.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250402.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a> <a href="https://mastodon.org.uk/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a>

Astronomy Picture of the DayJupiter and Ring in Infrared from Webb Image Credit: NASA, ESA, CSA, STScI; Processing & License: Judy Schmidt <a href="https://apod.nasa.gov/apod/ap250402.html" rel="nofollow noopener noreferrer" target="_blank">https://apod.nasa.gov/apod/ap250402.html</a> <a href="https://reentry.codl.fr/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

小太阳君<a href="https://b612.me/tags/APoD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APoD</a> <a href="https://b612.me/tags/%E6%AF%8F%E6%97%A5%E4%B8%80%E5%9B%BE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#每日一图</a> <a href="https://b612.me/tags/2025%E5%B9%B404%E6%9C%8801%E6%97%A5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#2025年04月01日</a>日偏食的双重日出 看似有二轮太阳同时东升，这可能吗？ 几天前，从加拿大魁北克省的莱斯库敏斯村（Les Escoumins）看出去，当时明亮的太阳正从地平线升起，而月亮恰好遮住部分的日盘，带来日偏食的现象，也造就了上面提到的这种奇景。 这部主题影片，以实时的速度呈现这场罕见的双重日出及它们在圣劳伦斯河面的倒影。 影片开头时，在远方云层的上方出现了2个亮斑，随后渐渐增长成2个明亮的角状结构，而它们其实是来自未完全食缺的日盘。 不久之后，食缺的太阳就升到地平线上方。 整体来说，带食的日出只持续不到2分钟，而这例日偏食持续的时间则长非常多。 尽管月亮每个月都会绕行地球一圈，但由于它的轨道略有倾斜，月亮通常会从太阳的上方或下方通过，并非每次都会造成日食。 <a href="https://www.youtube.com/watch?v=oTkbHJsqCZM?rel=0" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=oTkbHJsqCZM?rel=0</a>

Khurram Wadee ✅A Double <a href="https://mastodon.org.uk/tags/Sunrise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sunrise</a> from a <a href="https://mastodon.org.uk/tags/PartialEclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PartialEclipse</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250401.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250401.html</a> <a href="https://www.youtube.com/watch?v=oTkbHJsqCZM" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=oTkbHJsqCZM</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

Astronomy Picture of the Day<a href="https://www.youtube.com/watch?v=oTkbHJsqCZM" rel="nofollow noopener noreferrer" target="_blank">https://www.youtube.com/watch?v=oTkbHJsqCZM</a> A Double Sunrise from a Partial Eclipse Video Credit & Copyright: Jason Kurth; Music: House of the Rising Sun (Sebastia McQueen via SoundCloud) <a href="https://apod.nasa.gov/apod/ap250401.html" rel="nofollow noopener noreferrer" target="_blank">https://apod.nasa.gov/apod/ap250401.html</a> <a href="https://reentry.codl.fr/tags/apod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a>

小太阳君<a href="https://b612.me/tags/APoD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APoD</a> <a href="https://b612.me/tags/%E6%AF%8F%E6%97%A5%E4%B8%80%E5%9B%BE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#每日一图</a> <a href="https://b612.me/tags/2025%E5%B9%B403%E6%9C%8831%E6%97%A5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#2025年03月31日</a>帕克探测器影片：从太阳附近看太阳系 如果你看得够久，迟早会出现彗星。 在那之前，你会见到美国航太总署的帕克太阳探测器在绕行太阳时，从水星轨道之内所拍摄的太阳系景观。 这部影片记录了日冕流束向外伸展成为慢速太阳风、一例小型的日冕物质抛射，及先后出现的行星，依序分别有：水星、金星、土星、地球、火星和木星。 在地球与火星之间的影片里，可以看到曳著明显彗尾的坦普一号彗星。 而画面中不断闪烁的短暂光痕，则是来自太阳的高能粒子轰击帕克号的侧视相机所造成的。 这部主题缩时影片，是在去年于第21次近距离接近太阳时拍摄的。 研究帕克探测器的数据和影像，有助科学家深入了解太阳动态如何影响地球的太空天气，以及对人类的电力系统、太空船和太空人可能的影响。 <a href="https://www.youtube.com/watch?v=YW1yQt3K_YY" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=YW1yQt3K_YY</a>

Khurram Wadee ✅<a href="https://mastodon.org.uk/tags/Parker" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Parker</a>: The <a href="https://mastodon.org.uk/tags/SolarSystem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SolarSystem</a> from Near the <a href="https://mastodon.org.uk/tags/Sun" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sun</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250331.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250331.html</a> <a href="https://www.youtube.com/watch?v=YW1yQt3K_YY" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.youtube.com/watch?v=YW1yQt3K_YY</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#APOD</a> <a href="https://mastodon.org.uk/tags/ParkerSolarProbe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ParkerSolarProbe</a>

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