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[2007-04-10]

Duplicate Books


[2007-04-10]

SUNSHINE Science

戲中完全沒有提及為何太陽會熄滅
為何要把炸彈放進太陽內

現在翻查一下,原來內裡大有文章!
雖然科幻,但不得不佩服這意念
只好坦白承認自己沒有這creactive mind

Sunshine請來CERN的粒子物理學家來當科學顧問
難怪走出這麼新奇科幻的故事

太陽被一種構想中的超對稱粒子Q-Ball所吞噬
放進太陽內的是一枚由黑暗物質組成的核彈
放進太陽內recreate big bang以分解Q-Ball

難怪片中隻字不提
以下Q&A quote自sunshine blog

Q: WHAT IS WRONG WITH THE SUN?

A: A Q Ball is eating the Sun from the inside out.

Q: WHAT’S A Q BALL?

A Q Ball is a super-symmetric nucleus, produced in the early Universe. That is to say, a nucleus made up of super-symmetric particles, formed shortly after the Big Bang.

Q: WHAT ARE SUPER-SYMMETRIC PARTICLES?

They are the super-symmetric counterpart to ordinary matter.

Q: WHAT IS ORDINARY MATTER?

Ordinary matter is what makes us up. Ordinary matter is constructed of atoms. The nucleus of an atom is constructed of protons and neutrons. Protons and neutrons are, in turn, composed of quarks.

Q: WHAT ARE QUARKS?

Quarks are elementary particles. Protons and neutrons are each composed of three quarks. The super-symmetric counterpart of a quark is a squark, and the Q Ball is composed of squarks.

Q: WHY IS THE Q BALL SO DANGEROUS TO THE SUN?

The protons and neutrons of ordinary matter would ‘rather’ be squarks. When ordinary matter is placed in close proximity to a Q Ball, the protons and neutrons are disrupted, ripped apart, and turned into squarks.

In other words, a Q Ball turns ordinary matter into itself. And unless it was stopped, this process would eat the Sun from the inside out, until a critical masa had been reached, at which point the Sun would explode.

Q: ARE SUPER-SYMMETRIC PARTICLES AND Q BALLS REAL?

This question should be answered by work that will be undertaken at CERN, the world’s largest particle physics laboratory, which has its headquarters in Geneva. In 2007, scientists will use the laboratory’s vast particle accelerator to search for super-symmetric particles. It is considered very likely that they will find them.

Q: IF Q BALLS EXIST, DO THE REALLY DESTROY STARS?

It is speculated that the origin of gamma-ray bursts may be the cataclysmic destruction of neutron stars by precisely this method. Gamma-rays are the most energetic form of light, and are produced by events such as supernova explosions.

Q: HOW WILL THE ICARUS MISSION STOP THE Q BALL FROM DESTROYING THE SUN?

The Icarus mission carries a Stellar Bomb, which it will detonate in the Sun. The bomb will destroy the Q Ball.

Q: HOW WILL THE STELLAR BOMB DESTROY THE Q BALL?

The bomb creates the same super-heated conditions in which the Q Ball was made. To be specific, Q Balls were formed at a particular time after the Big Bang: 10 to minus 35 seconds. The heat at this moment of the Big Bang was 10 to the power of 32 degrees.

By recreating these conditions, the Q Ball will split up, separating it into squarks. Squarks on their own decay quickly into normal or stable (benign) supersymmetric particles. Put simply, the Stellar Bomb makes the Q Ball fall to bits.

Q: WHAT IS THE STELLAR BOMB MADE OF?

Dark matter and Uranium. In the same way that an atomic bomb uses normal explosives to trigger uranium into a nuclear explosion, the stellar bomb uses uranium to trigger the dark matter.

In the film Sunshine, mankind has been able to construct two of these Stellar Bombs. The fact that the Stellar Bomb uses uranium is the reason that mankind is limited to only two payloads – because Earth does not contain enough uranium to build a third.

Q: WHAT IS DARK MATTER?

We don’t know, but we have considerable gravitational evidence that it exists. Simply put, the gravitational effects that we can observe in the Universe require much more matter than we can see. Because we can’t see this hidden matter, it has been termed ‘dark’. Dark matter might make up as much as 95% of the Universe.

It is widely speculated what dark matter actually is. Planets, dim stars, neutrinos, exotic particles, and weakly interacting massive particles. But Q Balls are a good candidate.

Q: ARE THERE ANY CAVEATS ABOUT THE SCIENTIFIC BACKGROUND TO THE FILM?

There are, not least because the film assumes that large areas of theoretical physics are correct. In addition, the Sun may not actually be dense enough to stop a Q Ball, but for the purposes of the film, we assume it is. Also, the rate of ‘eating’ is proportionate to the density of Sun - so the rate might be very slow.


[2007-04-10]

SUNSHINE

SUNSHINE
這不是一套講未日救世的電影
不要用「明日之後」的思維去看這一套戲

以太陽為題材,有很多與太陽相關的visualization
很多都很真實,如黑子、米粒組織等等
但這不是一部天文電影,跟Apollo 13不同
這是一齣科幻片

曾經看過很多評論把這片品評得一文不值
我倒不這樣認為
或許我自己看這片的角度跟一般普通人很不同
由一開始看到Icarus 2的設計便心感讚嘆

的確,我從未看過一艘manned solar spacecraft的設計
設計中體現了很多concept,我最欣賞oxygen garden
還有那件太陽任務的太空衣,當然還有那個sunshield
至於dark matter bomb,實在太科幻了

看這套片,看的是人性的刻劃
的確切實地把人類可能的想法描繪了出來

但對我而言,這些刻劃的深度未夠深入
竟然被選中了進行未世拯救任務的人,
在心理素質上應當有一定水平,
對大自然、對神的敬畏、對人類是星塵的認知應該不止如此
在長時間的太空航行下心理狀況的改變應當可以有更深入的體會和表述
但戲中角式只是對長時間太空航行的問題作了表面的表述

這片的中心思想
我也感讚同

Icarus 1船長的出現是劇情上的需要
估不論科學不科學

我想這片最差勁的地方
就是把自己的賣點放錯了位置
所以才那麼多人失望

片中,好幾幕印象特別深刻
1. Sunshield 上船長面對衝擊波
2. 人類跟隨核彈活生生地進入太陽
3. 水星出場的一幕,真的很impressive

總括而言,這片雖然未至滿分,但也值得一看
單是那個太陽的CG,已經值回票價

:: Link


[2007-04-04]

SKY AT NIGHT 50th Anniversary

英國人真幸福
50年來,從不間斷
BBC 的 The Sky At Night
由Patrick Moore主持
史上最長的連續播放節目

踏入了金禧
同時也是太空探索五十年的年頭

Sir Patrick Moore
傳奇的人物
一個尊敬的人
著作了數不清的天文書
即使現在年老了,還親力親為

開始為他的身體擔心
現在Sky At Night都只能在他家中拍攝

我也是近年才知道有Sky At Night這回事
實在不可思議
連續50年,每個月開啟電視,便能知道最新發生的天文事

幸好現在科技發達
否則必然妒忌死...

Happy Anniversary to SKY AT NIGHT~


[2007-03-30]

可觀天文講座及觀星樂 - 麥克諾特彗星回顧

可觀自然教育中心暨天文館主辦

日期: 2007年4月28日(星期六)
時間: 晚上7:00 - 9:30
地點: 嗇色園可觀自然教育中心暨天文館
(荃灣荃錦公路101號)
節目: (1) 講座 「麥克諾特彗星回顧」 (可觀天文館許浩強先生主講)
(2) 數碼立體星象館模擬星空體驗
(3) 觀星
(4) 參觀0.5米口徑望遠鏡
費用: 全免
名額: 60

講座內容簡介:
數月前,一顆光芒四射的彗星以令人驚嘆不已的姿態現身夜空,上演了一場極度華麗的星空匯演,為新的一年揭開了醉人的序幕。這顆最亮時達-5等以上,彗尾長度超過三十度的麥克諾特彗星不但吸引了全球天文愛好者的目光,更被譽為三十年來難得一見的大彗星。 十分可惜的是香港一直不在觀測的有利位置,令我們未能一睹她的風采。麥克諾特彗星現在已遠離地球,而且變得愈來愈暗淡。就讓是次講座為大家介紹一些她的故事,以及回顧一下這偉大彗星的短暫光輝。

活動內容簡介:
在講座後,還會參觀可觀天文館0.5米口徑巨型望遠鏡觀賞月球、土星和春季星座等。同時,在數碼立體星象館的天幕下,利用魚眼數碼投影機,製造出一個虛擬的星空,各位能躺臥於天幕下欣賞銀河和流星雨,仿如到了真實的星空一樣。

參加辦法:
請致電或電郵報名登記
名額有限,先到先得

報名及查詢:
電話 24137122
電郵 astronomy@hokoon.edu.hk

截止日期:4月28日 正午12時

如要取消報名參與當晚活動人士,請於4月28日正午12時前致電可觀天文館,多謝合作。

交通安排:
(1) 於荃灣地鐵站乘搭紅色的士直達(車費約HKD$30)
(2) 駕車者可直接驅車入可觀自然教育中心停泊
(3) 可自行於荃灣川龍街乘搭往川龍的80號專線小巴(HKD$5)

地圖:http://www.hokoon.edu.hk/contact_1.html


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