variable star造句

• These objects include variable stars as well as supernovae
  这些物体包括象超新星这样的变星。
• List of known variable stars
  变星列表
• Cepheid variable stars are stars whose brightness changes at regular periods
  造父变星是一种光线按规律周期发生变化的恒星。
• Welcome to the american association of variable star observers ( aavso ) nova search program
  欢迎访问美国变星协会新星搜索组。
• Naked - eye variable star
  肉眼变星
• Besides , many stars vary in their brightness , they are called variable stars
  另一方面，有些星则会改变光度，我们叫它们为变星。
• Another new small - amplitude red variable star with period of about one day in the globular cluster m
  4中另一颗周期约一天的小变幅新红变星
• A double , eclipsing variable star in the constellation perseus , almost as bright as polaris
  大陵五，英仙座星，恶魔星英仙座的双星，几乎与北极星一样明亮。
• Unlike the eclipsing variables that are related to geometry , some variable stars are variables because of their intrinsic structure
  ：和食变星不同的是，有些恒星的光度变化是内部因素所造成的。
• There are several types of variable stars . the graph showing the variation of brightness with respect to time is called the
  变星种类繁多，科学家通常会用图来显示恒星亮度随时间的变化，这种图称为
• All red giants are variable stars . the core keeps on contracting and heating up until it is hot enough for the
  所有红巨星都是变星，当外壳不断膨胀，氦核心同时不断收缩加热，直至足以燃烧氦我们称之为
• This makes space telescope invaluable for identifying a rare class of pulsating stars , called cepheid variable stars embedded within m100 ' s spiral arms
  这对于从m100的旋臂中分辨出暗藏的造父变星有着莫大价值。
• In 1784 , john gooddricke , a 19 - year old british astronomer discovered that delta cephei was a variable star with a period of 5 . 4 days . two years later , this dumb and deaf genius suddenly passed away
  两年后，这位聋哑天才遽然逝世，但他的发现却把人类对天体距离的测度向前推展超过一亿光年！仙王座的
• Astronomers made observations of cepheid variable stars [ pictured above ] ? pulsating stars used to measure vast distances ? in the virgo and other clusters to establish the expansion rate and the universe ' s age
  天文学家用哈勃观测到仙女星座和其它星群中的造父变星(如图) ，以确定宇宙的膨胀速度和宇宙的年龄。
• It analyses company of the value and controllable variable star according to the positive method , such as company of scale , velocity of share circulation , market shares and relevance of the trade value of goodwill , to test five hypothesizes on its value
  其中商誉的交易价值大小表现为股票的流通股价格和产品交易价格超过它们各自符合假定市场公正平均价格的差额。
• Sometimes , in a binary star system , one star will pass in front of the other producing what we call eclipsing binary . it can be treated as a special kind of visual binary . eclipsing binary systems are variable stars see below
  ：有些双星系统，其中一颗星会在另一颗星前经过，产生周期性的光度变化，我们称这种双星为食双星，基本上我们可以把食双星看成为目视双星的一种。
• Based on the viewpoint of interaction between waves in plasmas , the partial differential equation that causes the spectral lines broadening has been deduced from radiation transfer equation of high - frequency electromagnetic waves in plasmas . the numerical solution has been obtained by using the fortran program we compiled . we concretely calculated the spectral lines widths of and fraunhoferx 3704 in corona , fj / a4923 . 9 in dwarf nova oy car and f . / a4934 in the variable star rr lyrae
  本文从等离子体波与波相互作用观点出发，由高频电磁波辐射转移方程导出了引起谱线宽度变化的偏微分方程，编写fortran程序求解偏微分方程的数值解，具体计算了日冕绿线f _ exiv 5303和夫朗禾费线3704 、矮新星oycarf _ eii 4923 . 9 、天琴rr型变星f _ ei 4934的谱线加宽值，对以上各谱线加宽中的等离子体致宽效应作了初步计算。