Question

in 2009, the kepler space telescope was sent to space to search for planets near our solar system. the telescope found about 960 planets. in 2013, however, there was a problem with keplers steering system. scientists on earth couldnt steer the telescope. they worried that they wouldnt be able to fix the kepler telescope. then scientists found another way to steer kepler using the power of the sun. light from the sun acted as a force pushing on the telescope. that force was enough to keep the telescope in place. what is the main, or central, idea of the passage? when it was first sent to space, the kepler space telescope discovered over nine hundred planets. scientists came up with a new way to steer the kepler space telescope after it developed a problem. the new steering system on the kepler space telescope used light from the sun to keep it in place.

Explanation:

The passage first introduces the Kepler space telescope's initial discovery of planets. Then it focuses on the problem with its steering system in 2013. The key part is that scientists found a new way (using the sun's light as a force) to steer it after the problem. The first option only mentions the initial discovery. The third option only details the new steering method's mechanism. The second option encompasses the problem - solving process which is the main flow of the passage.

Answer:

Scientists came up with a new way to steer the Kepler space telescope after it developed a problem.