Crater
on Mars 火星上的隕石坑 (23/7/2003)
今次帶大家看看火星上的詳細地形，每顆行星自己都有其獨特的地形(沒有地殼那些不計)，甚至一顆行星內的不同地方，地形也會很不同。這輻圖的主角是隕石坑，一個由隕石撞擊而形成的洞。這隕石坑位於火星的中緯度地區，遲些那其他的隕石坑來跟這個比較，你就會見到它們的不同了。
Caption::
Craters in the middle latitudes of Mars often have strangely-textured
floors. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image
of a crater near 40.2°N, 184.5°W provides an example. The original crater
has been somewhat eroded and much of its interior has been filled with
sediment since it formed. The origin of the strange texture is unknown;
speculations about most mid-latitude textures tend to focus on the idea
that, somehow, subliming ground ice may have been involved. The texture
on the floor of the crater is similar to, but not quite the same as, the
texture on the nearby surfaces to the north and south of the crater. This
picture covers an area 1.4 km (0.9 mi) wide. Sunlight illuminates the
scene from the lower left.
Credit::
NASA/JPL/Malin Space Science Systems
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Star
Formation Region W49 恆星誕生地 W49 (22/7/2003)
這裏是一個叫W49的地方，有著很多的很生的恆星，但全被圖中紅色的星雲包裹著。這星雲又稱分子雲，因為當中有很多塵埃，普通的可見光係不能穿透的，要用紅外線和射電波才可以看到當中的情況。
Caption::
This image shows a three-colour composite of the central region of the
star-forming region W49A, based on a radio emission map (wavelength 3.6
cm; here rendered as red) as well as two SofI images in the Ks- (green)
and J-bands (blue). The red-only features in this image represent regions
of ionized hydrogen so deeply embedded in the molecular cloud that they
cannot be detected in the near-infrared, while blue sources are foreground
stars. The radio continuum data were taken with the Very Large Array by
Chris De Pree.
Credit::
European Southern Observatory
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Moonlanding
34th Anniversary 登月34週年 (21/7/2003)
34年前的今日，即1969年7月21日，太空人岩士唐和艾得寧在阿波羅十一號的任務中，成功登陸月球，成為首2位踏足月球的人類。34年前的今天，是人類歷史上一個非常重要的日子，所以今天放了一張大家見慣的相出來，相中的是艾德寧。
Caption::
Astronaut Edwin E. Aldrin, Jr., lunar module pilot, walks on the surface
of the Moon near the leg of the Lunar Module (LM) "Eagle" during
the Apollo 11 exravehicular activity (EVA). Astronaut Neil A. Armstrong,
commander, took this photograph with a 70mm lunar surface camera. While
astronauts Armstrong and Aldrin descended in the Lunar Module (LM) "Eagle"
to explore the Sea of Tranquility region of the Moon, astronaut Michael
Collins, command module pilot, remained with the Command and Service Modules
(CSM) "Columbia" in lunar orbit.
Credit::
NASA
|
Seals
海豹 (20/7/2003)
海豹是生長於南北兩極的動物，由於海豹是行一夫多妻制，所以新生的海豹BB都是由媽媽來照顧。不過海豹的身體幾乎每一個部份都十分名貴，所以不斷被人類獵殺，數目暴減...為何人類總要這麼自私？
Caption::
Seals live in polar regions, each male seal have plenty of mates, but
female seal follow only one male, therefore each seal baby is only look
up by their mother. The number of seals is dramatically decreasing, as
human beings hurt them for selling their different body parts. Why? why
people are so self-orientated and neglect other animal on this planet?
Credit::
Tom Brakefield
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Leonids
2001 獅子座流星雨 2001 (19/7/2003)
有看過流星嗎？不打緊，其實流星是很常見的（只要你肯花時間去等）。這張是2001年獅子座流星雨時所影回來的流星，不過小心，流星是很長很長那條直線，而不是背後那短短的光跡，那些只是星流跡而已。細心一點的話，會發現這顆流星是綠色的。
Caption::
Did you ever see a meteor? If no, it doesn't matter as metoer is actually
very common, if you spend enough time to wait for it. This photo is a
meteor during the 2001 Leonids, but be careful to distinguish the meteor
with star trails in the image. If you look more carefully, you can notice
the color of this meteor is green.
Credit::
Jim Fakatselis
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