main idea: a way to define the dark hola constitute ma, counter view and the evidences to defense
structure:
the way to define the the dark hola is composed of ma ➡️ the star of x x right behind ma, the light rays bend and appears to be temporarily bright ? intrinsic light ? 1.microlensing magnify all colors in same fold but brightening affect different color differently 2. chance of a star undergo microlensing twice is minuscule
• Way: composed of MACHO?
○ MACHO:
§ drift in front of a star
§ Star: brighten = microlensing
□ Some astronomers:
® Mistaken: variable brightness VS microlensing
□ However
® Variable star: different colars affected differently
® Microlensing: colors -equally affected
◊ Blue=red
® Undergo only once
Main Point:
propose a way to determine dark halo, meanwhile provide the evidence to solve the contention
结构:
提出判断方法,说原理,被质疑,提出解释
段落:
先说BP天文学家发现了一个新判断方法
● 大的黑HAlO促成milky way galaxy的外部的是由MACHO组成的,以前太微弱都看不到
然后说原理
● MACHO 会偶尔到在Large Magellanic Cloud的恒星的上方,恒星的光线会被聚合
● 所以从地球看这个行星就会时常出现光亮,一个叫做miscrolensing的过程
有人质疑说这些光可能是星体自己变化的啊,不是被遮挡
解释:
● 如果是恒星自己变颜色呢,恒星释放不同颜色的光线是受到了不同影响
● 但是呢miscrolensing这个过程下,所有的颜色都是一样被影响的
举了个例子
● 而且只经历一次,第二次几率很小