主题：科学英语:每日星相(10.28)

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.
在万圣节来临之际，试着寻找英仙座的ß星吧，也就是大陵五星。这颗星的名字源于阿拉伯语中的食尸鬼和恶魔。
This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes. All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star. In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
这颗星的亮度呈周期性变化，这个周期刚好是2天20小时49分钟。这颗星总能被我们的肉眼所观察到。大陵五的亮度变化并不是由于该星星的某种特质引起的，事实上，正如我们在地球上所看到的一样，是一颗星星有规律的从另一颗上面穿过而导致的。
Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change. Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star.
早期的天文学家没有办法找出大陵五亮度变化的原因，但他们确实已经注意到了它的亮度会变化的现象，在古代，世界上的某些地方把大陵五与魔鬼和恶魔联系在一起。希腊和罗马人则把这颗星与美杜莎，那个长着蛇发的魔鬼联系起来，一直以来这颗星被称为“恶魔之星”。
最后由 Lucy1204 于 2009-10-28 11:58:24编辑

板凳啊

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.
万圣节降至，大家试着在天空找一下英仙座β，或者叫大陵五（algol)。这颗星的名字来源于阿拉伯语中的食尸鬼的头像或恶魔头像。

This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes. All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star. In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
Algol意思周知的亮度变化周期确定的变星。周期为2天20个小时49分钟（2.87天，没有精确算）。在此期间，这颗星一直都是可见的。Algol的亮度变化并不取决于一些特殊品质的单星。事实上，在一个双星的系统中，从地球上特定的角度看，就像一颗星从另一颗星前面经过产生的亮度变化。
Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change. Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star
早前的观测者并不知道Algol亮度变化的原因。但是他们也确实注意到这颗星亮度的变化。经历远古岁月，Algol渐渐的与魔鬼或恶魔联系起来。在古希腊和罗马帝国时，Algol被认定为美杜莎的头，一个蛇发的恶魔。他也被叫做食变星.
最后由 郁闷—无聊 于 2009-10-28 09:48:21编辑

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.
万圣节正在接近中，试着找找看英仙座β星，别名大陵五。这颗恒星的名称来源于阿拉伯食尸鬼的头或者恶魔的头。
This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes. All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star. In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
这颗恒星的亮度会周期性的变化，变化周期为2天20小时49分钟。这段时间内，我们仍然可以看到这颗恒星。大陵五的亮度变化并不是由于某些特性引起的。事实上，它是一个双星系统，从地球这边看，就是一颗星公转到另一颗星的前面。
Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change. Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star
早期的天文学家没有方法得知为何大陵五的亮度会发生变化。但是他们很可能已经注意到这颗恒星亮度变化的事。在古代大部分地方，大陵五是与恶魔或食尸鬼联系在一起的。希腊人和罗马人认为这颗恒星是美杜莎的头，她的头上都是蛇而不是头发。现在这颗恒星也被叫做“魔星”。

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.

This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes. All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star. In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.

Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change. Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star
随着万圣节临近，试试去寻找英仙座Beta星，也是我们所熟知道大陵五星。这颗星的正式名字来源于阿拉伯语中的食尸者的首领，也称尸王。
这颗星的明亮程度每隔一段时间呈现一种规律性变化。这个周期确切持续时间为2天，20个小时，49分钟。这段时间内，这颗星可以被我们观测到。大陵五的亮度变化的原因不是由于星体物质特殊。实际上，星系层层叠叠，包罗万象，当我们透视地球上空，所看到景象是一颗星星规律性运行到另一颗星星前。
古代观星者无处得知大陵五变幻莫测的原因。但很有可能的是他们注意到这颗星易变的特性。古时候大部分地区的人民都将大陵五与恶魔或者怪物联系一起。古希腊和古罗马人将这颗星与一种骇人的蛇发女妖联系在一起。这颗星也被称为盗尸星。
P.S  百分百确定这个也做过啊···尤其对蛇发的···印象深刻···
最后由 heylady 于 2009-10-28 14:34:40编辑

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.
今天我们要介绍的这颗星星有很多名字，有的来源于阿拉伯神话，如叫食尸鬼的头，或者叫恶魔的头。希腊人和罗马人通过蛇发妖女（星座）来确认它的方位。天文学上我们称它为大陵五，或者英仙座β星，又或者古勒星。

This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes. All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star. In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
这颗星星的亮度呈周期性变化，确切的周期是2天20小时49秒。尽管如此，我们却一直能够看到它。它的亮度变化并不是因为其本身含有什么特殊物质，而是因为它实际上是一个多星系统，由于星星运动挡住其他星星的光亮，导致我们从地球上看去它的亮度发生了变化。

Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change. Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star
早期的天文学家也注意到这颗星星亮度的变化，但是他们并不知道变化的原因。

Written by earthsky
作者：earthsky



最后由 JanetYeChina 于 2009-10-28 14:55:38编辑

昨天有个同事买了一个双筒望远镜，今天寄到。顺便赠送的旋转星图也送到我手上啦···哈哈····

恭喜你！！！这几天我也用肉眼注意了一下天空，除了看到离月亮最近的那颗木星外，其他星星都没看到，偶尔还会有飞机的灯亮飘过，倒是。

哈哈 我这里穷乡毗邻的，保证没飞机的灯，不过还是稍微有点光污染···一般等到晚上10点很多星星都能用肉眼看到了。不过这两天夜里天气多云，除了月亮和木星，啥也没有。
如果在大城市，估计那些人很不幸的···或许只能到下半夜才能看到星星吧。
不过最精彩的还是在午夜后的夜空···不过我都在睡梦中度过了··

我也是。不过我都是到阳台洗衣服的时候，顺便瞄几眼而已呀。。。。

As Halloween approaches, try looking for Beta Persei, otherwise known as Algol. This star’s proper name comes from the Arabic for head of the ghoul, or head of the demon.
万圣节将近，试试找找Beta Persei吧，以Algol著名。这颗星星的全称来自阿拉伯的盗墓者头头，或者可以叫魔鬼头头。
This star is known to vary in brightness over a regular time interval. The cycle lasts exactly 2 days, 20 hours and 49 minutes.
这颗星星因为亮度变化比一般星星的变化间隔时间要长。周期持续整整2天零20个小时零49分钟。
All the while, the star remains visible to the eye. Algol’s brightness variations are not due to some special quality of a single star.
整个过程中，它都能持续被看见。英仙座的光亮强度不是取决于某些个别特殊质地的星星。
In fact, this is a multiple star system, where one star regularly passes in front of another as seen from our earthly perspective.
实际上，这是一个有着许多星星的星系，在我们星球上看来，在那里，一颗星星有规律地穿过前面的一颗。

Early stargazers had no way to know why Algol varied in brightness. But it’s likely that they did notice this star’s brightness change.
早年的星象家没有办法知道为什么英仙座有多种多样的亮光。但是似乎他们已经注意到这颗星星的光亮在改变。
Throughout parts of the ancient world, Algol was associated with demons or monsters. The Greeks and Romans identified the star with the Head of Medusa, a fearful monster with snakes in place of hair. The star has also been called The Ghoul Star
纵观部分古老国家，人们把英仙座和魔鬼、怪兽联系起来了。希腊和罗马认为英仙座和Medusa的头头—一个可怕的怪兽，它头上没有头发长的全是蛇，有关。因此这颗星星又叫做恶魔星。
Written by earthsky