Hi adymehta29,
Below is my reasoning to cancel D.
D)temporarily increase the apparent brightness of a star in the Large Magellanic Cloudby increasing the gravity of thestar.
"The gravity of a MACHO that had so drifted , astronomers agree,would cause the star's light rays , which would otherwise diverge,to bend together so that , as observed from Earth,the star would temporarily appear to brighten , a process known as microlensing."
As per the argument, MACHO doesn't increase the gravity
...
Below is my reasoning to cancel D.
D)temporarily increase the apparent brightness of a star in the Large Magellanic Cloudby increasing the gravity of thestar.
"The gravity of a MACHO that had so drifted , astronomers agree,would cause the star's light rays , which would otherwise diverge,to bend together so that , as observed from Earth,the star would temporarily appear to brighten , a process known as microlensing."
As per the argument, MACHO doesn't increase the gravity
...
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