Question

What are the two primary methods by which planets have been found around other stars in our galaxy?

I) Direct images in visible and infrared light
II) Indirectly by detecting the motion of the host star
III) Indirectly by measuring the drop in brightness of the host star when the planet crosses our line of sight
IV) II and III

Answer 1

Answer: The primary two methods by which planet are found around other stars are:

I) Direct images in visible and infrared light.

Explanation: This is viewing the star by seeing itself. This method is very tedious and difficult because of the light made up by the extrasolar planets around the galaxy.