【天文】你生日那天的宇宙
淋完衫
192 回覆
145 Like
2 Dislike
樓主去左邊呀
樓豬好畀心機 
推
好耐冇見樓主
樓主消失左
偷懶者
樓豬呢
On this day in 1990, the Hubble Space Telescope was deployed into orbit 381 miles above Earth from the space shuttle Discovery. Happy birthday, Hubble! 🔭🎂 #NASAAtHome #OnThisDayInHistory
Pictured is a view of the Carina Nebula's 'Mystic Mountain'.
https://twitter.com/NASA_eClips/status/1254072462465208321?s=19
樓豬唔得閒，代貼頂住先。
Pictured is a view of the Carina Nebula's 'Mystic Mountain'.
https://twitter.com/NASA_eClips/status/1254072462465208321?s=19
樓豬唔得閒，代貼頂住先。
推
My friend Stephen is a science fiction fan. He said "If starships would exist, I would quit my job and spend the rest of my life roaming the universe." By the end of the next century, scientists will have invented starships. As I'm extremely interested in the science of starships, I'm gonna ask physics professor Dr. Chan about it. I'm gonna wait outside the lecture hall at twenty five to six. He will have finished his lecture. I thought about phoning him at quarter after three but my friend said "Don't phone him now. He won't have finished his lecture yet." It's true that he wouldn't have finished teaching yet. Stephen is an accounting manager at Foodpanda. If he takes the job at Big 4, he'll be three thousand five hundred dollars a month better off but he's still better off now than he was for years ago when he was working below everybody else in the department. He thinks a junior accountant position is beneath him. If he hadn't taken the CPA exam four years before, he wouldn'tbe working as a manager now. If he'd pursued a career in marketing and sales instead of accounting, his salary would be much lower. If it weren't for his uncle's referral to Foodpanda, his career wouldn't take off now and he wouldn't start earning a lot of money. Recently, his sister married her high school sweetheart. Her father felt she was marrying beneath her though. Her auntie also feels her husband is beneath her. She enjoys socializing with the better off. Three months ago, Stephen was away on a business trip to Hokkaido. After his trip, I said "If you should travel to Hokkaido again, can you get me a pack of White Lover Cookies please?" Stephen is a computer expert. His cousin has to write a report which is die on Tuesday but he's having problems with his computer. If Stephen would go and fix his computer, he would be so thankful for Stephen's help. His cousin also has exams next Monday so he's better off revising at home over the weekend.
樓主呢？
樓主
11月生日 一年後翻黎
2月15日
拍攝於1998年，位於大熊座方向，距離地球5,900萬光年嘅不規則星系 茲維基18 Galaxy I Zwicky 18。
位於左下角嘅 I Zwicky 18 相當細，直徑只有3,000光年。（銀河系直徑約為十萬光年）
而右上角就係 I Zwicky 18 嘅伴星系。因為兩者距離得好近，兩者嘅重力交互令 I Zwicky 18 產生好多新嘅恆星。
據觀察，銀河系入面最老嘅星團約為130億年歷史，而宇宙嘅年齡則約為138億年。
因為喺 I Zwicky 18 所觀察到嘅恆星都比較年輕，天文學家估計 I Zwicky 18 只有5億年嘅年齡。
I Zwicky 18 係一個非常年輕嘅星系，但佢附近嘅星系就有100億年老。
由於 I Zwicky 18 好細又好遠，而 Hubble 望遠鏡嘅觀測係有佢分辨率同靈敏度嘅極限。
所以到底係 I Zwicky 18 真係年輕，定係年老嘅恆星未被發現，咁就等大家自己判斷啦！
----------------------
2月16日
拍攝於2005年，距離地球5,000萬光年嘅觸鬚星系 Antennae Galaxies。
佢又稱為 NGC 4038-4039 ，係兩個星系約9億年前接近，並慢慢交互所形成。
地球上嘅生物眾所周知都係碳基生命 Carbon-based life ，是指以碳元素為有機物質基礎嘅生物。
有科學家就思考會唔會有除此以外嘅生命形式，而開始咗一門稱為假定型生物化學 Hypothetical types of biochemistry 嘅研究。
科學家針對不同於現有嘅生物化學形式作出研究同推測。
理論上所推測嘅假定型生命形式係科學上可行嘅，但又未被人類發現到。
Chandra X-ray Observatory 觀察 Antennae Galaxies 時就發現，其當中擁有嘅矽係太陽嘅24倍。
而 矽基生物 Silicon-based life 就係其中一種相信係可行嘅生命形式。
----------------------
2月17日
拍攝於2015年，距離地球8,200萬光年嘅 Dwarf Galaxy Kiso 5639。
Kiso 5639 望落就好似一粒流星，但其實係矮星系黎。
天文學家相信係一百萬年前，Kiso 5639 撞擊到一絲氣體，星系得到新嘅物質激發咗劇烈嘅恆星誕生。
我地而家睇到閃閃發亮嘅紅色頭部，其實就係氫氣被新恆星激發而發光。
----------------------
2月18日
拍攝於2014年，距離地球1,350光年嘅 赫比格-哈羅24 Herbig-Haro 24。
呢個望落就好似光劍嘅結構，其實係恆星噴流所形成嘅。
類似黑洞個兩條Jet，同樣係物質喺吸積盤中高速移動，得到嘅能量令到粒子離化，然後沿著磁場被射出。
而HH24嘅恆星咁岩被氣體擋住咗，所以我地只係睇到兩條噴流。
一齊欣賞下一張HH24嘅畫作。
大家唔洗擔心，後面嘅月份會愈黎愈快，因為愈黎愈多重覆
好掛住樓主 
支持
支持有文