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Glossary term: 天空

Description: 當我們站在戶外,向地平線之上看去,視線又不受地球上任何建築物阻擋時,就能看到天空。地平線是我們所能看到的地球和地球上建築物的邊界。在夜晚晴朗的天空中,我們可以看到遙遠的行星、恆星,甚至一些星系(北半球的仙女座星系和南半球的麥哲倫雲)。星點的閃爍證明我們仍在透過地球大氣層的氣體觀察天體。白天,被空氣分子散射的陽光使天空呈現出藍色,遮擋了我們觀察宇宙深處的視線。遮住天空的雲或霧也會讓我們無法觀測到任何天體。

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

Related Media


The arc of the Milky Way over some trees. Two small galaxies can be seen in the lower middle of the image.

Milky Way Over Quiver Tree

Caption: This breathtaking photograph was captured on 17 June 2023, near Keetmanshoop, Namibia, with a smartphone. Dominating the night sky, the majestic arc of the Milky Way creates a celestial bridge across the heavens. The image captures a range of notable astronomical objects: the Large and Small Magellanic Clouds, seen towards the bottom of the image and appearing as fuzzy clouds; Antares, seen towards the top left of the image; and the coalsack nebula (referred to by various names by Indigenous cultures around the world), seen vertically above the Large Magellanic Cloud. Silhouetted against this astral backdrop, the trees — which are actually succulent aloe plants native to southern Africa — add a touch of Earth's unique beauty. Historically, these plants were known as ‘quiver trees’ because groups of local Indigenous people would use their hollowed branches to hold darts. The serene Namibian landscape, combined with the brilliance of the southern hemisphere's stars, offers a glimpse into the majesty of our Universe.
Credit: Jianfeng Dai/IAU OAE (CC BY 4.0)

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons


四臺碟形望遠鏡指向夜空,銀河的弧線橫亙頭頂。

橫亙 H.E.S.S 天文臺上空的銀河

Caption: 2023 年 6 月,在納米比亞,H.E.S.S 天文臺的天空一片漆黑,組成銀河系的恆星似乎數不勝數,讓人難以在這張用智能手機拍攝的照片上分辨星座。在照片左下方的塔附近,可見半人馬座阿爾法星和貝塔星。在照片左側的 H.E.S.S 望遠鏡右上方,可見一顆橙色恆星——心宿二,位於天蠍座心臟的一顆紅巨星。
Credit: Jianfeng Dai/IAU OAE (CC BY 4.0)

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons


北斗七星逐漸向左側地平線下方移動,而右側則有一顆彗星在天空中升起。

北斗七星和新智彗星 C2020 F3

Caption: 這段延時攝影記錄了2020年7月拍攝的三幀畫面中標誌性的北斗七星的軌跡。影像在意大利的三個地點拍攝:拉瓦雷多三峰(Tre Cime di Lavaredo)奧隆佐迪卡多雷、裡特山(Monte Rite)奇比亞納迪卡多雷,以及拉佐牧場(Casera Razzo)維戈迪卡多雷。這場視覺奧德賽展示了北斗七星的迷人軌跡,並在夜空中繪製出天體畫卷。它不僅描繪了這個著名星群的軌跡,還捕捉到2020年7月照亮天空的罕見新智彗星 C/2020 F3 這一非凡的天文事件,為我們的夜空增添了光彩。
Credit: 喬爾賈·霍弗/國際天文學聯合會教育辦公室 (CC BY 4.0)

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons


The Milky Way appears as a diagonal stripe bottom left to top right. It becomes more horizontal as the video progresses.

Southern Sky Over La Silla

Caption: This video shows the Milky Way’s sprawling brilliance across the celestial expanse. Among the stars’ grand theatre, the Southern Cross constellation claims its place in the scene, distinguished by its distinctive cross shape as seen in the top of this video and slightly to the right just over the Milky Way, slowly disappearing as the video progresses. This celestial marker, a prominent feature in the southern hemisphere, holds cultural and navigational significance, having served as a navigational guidepost for centuries. Accompanying the Milky Way’s grandeur are the two Magellanic clouds, celestial companions seen dancing in the distant sky. The Carina Nebula adds its ethereal glow to the cosmic panorama, painting a radiant hue against the darkness. In the midst of this celestial ballet, a gentle green hue envelops the atmosphere, a phenomenon known as airglow, adding a touch of subtle luminescence to the night sky. The terrestrial also makes an appearance, with planes flying overhead and vehicles driving between observatory buildings. This time-lapse, taken from the La Silla Observatory in Chile, is a window to the captivating dance of stars, offering a glimpse into the awe-inspiring beauty of our galaxy and the celestial landmarks that grace the southern sky.
Credit: José Rodrigues/IAU OAE (CC BY 4.0)

License: CC-BY-4.0 Creative Commons 姓名標示 4.0 國際 (CC BY 4.0) icons