恒星年

Over 400 light-years away, at the edge of a molecular cloud , both star and nebula are seen to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young -- less than a few million years old -- sun-like stars still in the early stages of formation .

它们的 观测亮度会有大幅度的变化，不过不一定会同步，而这也是此区域的谜团之一。T型变星通常是年龄不到数百万年的年轻类太阳恒星，还处在恒星形成的初期阶段。

We've been observing a sunlike star called 55 Cancri, star 55 in the constellation Cancer, for 19 years, and we watch the wobble of this star as it's yanked on by the planets orbiting it.

她说：19年来，我们一直观察这颗名为55巨蟹的类日恒星--巨蟹座55号恒星，我们观察到它的不稳定性，因为它与临近的行星有引力作用。

We've been observing a sunlike star called 55 Cancri, star 55 in the constellation Cancer, for 19 years, and we watch the wobble of this star as it's yanked on by the planets orbiting it.

&我们一直观察这名为&55 Cancri类太阳恒星19年了。55号恒星是在巨蟹星座中。当它吸引行星围着它转时，我们观察它移动的轨迹。

We've been observing a sunlike star called 55 Cancri, star 55 in the constellation Cancer, for 19 years, and we watch the wobble of this star as it's yanked on by the planets orbiting it.

我们19年来一直在观察一个类似太阳的恒星叫55号巨蟹星，是巨蟹星座里的第55号恒星。当它被环绕它的行星牵引时，我们发现它有些颤抖。

W e' ve been observing a sunlike star called 55 cangree Cancri, star 55 in the consterlation constellation Cancer, for 19 years, and we watch the wrable wobble of this star as the tingun it's yanked on by the planets orbiting it.

&我们已经持续了19年观测这颗类似太阳的的恒星&巨蟹55(55 Cancri)。我们观察这颗恒星像被许多行星猛拉转动一样。

These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas.

在四百万年以前，星云物质聚集形成了这些恒星，它们的星风（一种从恒星不断向外运动的物质流，类似于太阳风）在星云中央清理出了一个空洞，这个空洞被一层尘埃和灼热气体所包围隔绝。

In 2005, astronomers discovered the first "hypervelocity" star careening out of a galaxy at nearly 530 miles per second (10 times faster than ordinary star movement).

在2005年，天文学家发现第一个超高速恒星以将尽530英里每秒（比一般的恒星移动速度快10倍）的速度冲出银河。

Explanation: M4 is a globular cluster visible in dark skies about one degree west of the bright star Antares in the constellation Scorpius. M4 is perhaps the closest globular cluster at 7000 light years, meaning that we see M4 only as it was 7000 years ago, near the dawn of recorded human history. Although containing hundreds of thousands of stars and spanning over 50 light-years, M4 is one of the smallest and sparsest globular clusters known. A particularly unusual aspect for a globular cluster is M4's central bar of stars.

M4是一个肉眼可见的球状星团，位于天蝎座心宿二的东面约一度位置。M4可能是最靠近我们的球状星团距离约7000光年，这意味着我们看到的是7000年以前的M4，即人类历史有文字记载的开始阶段，它跨越50光年包含有数10万颗恒星。M4是已知在尺度及包含恒星数量上最小的球状星团。M4独特之处是它中心的棒状结构。

The observation confirmed a decade of speculation that a warp in the young star's dust disk may actually be a second disk inclined to the star.

这项观测确定了10年来的推测学说，即年轻恒星的尘埃盘可能实际上时第二个尘埃盘向恒星一侧倾斜。

Sidereal month, the moon in the celestial sphere on two consecutive pass C had a stellar time interval, the length of 2732166 level solar day. C (5) calendar month, a calendar year is divided into 122 months, 1,3,5,7,8,10, and December 31 each for flat solar day, 4,6,9 and 11 month for 30 a flat solar day, in February for the 28 flat solar days, a leap year for the 29 level solar day.

恒星月，月球在天球上连续两次通C过某一恒星所需的时间间隔，长度为2732166平太阳日。C（5）公历月，一公历年分为122个月，1、3、5、7、8、10和十二月各为31个平太阳日，4、6、9和11月各为30个平太阳日，2月份为28个平太阳日，闰年为29个平太阳日。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了