Question

what is one reason that exploring space is hard?
it is very dangerous to drive on other planets.
other galaxies are very far away from earth.
the speed of light cannot be measured.
there are no stars outside our solar system.

Explanation:

To determine a reason exploring space is hard, we analyze each option:

• Option 1: Driving on other planets' danger isn't a core reason for space exploration difficulty (focus is on travel/study, not planet driving).
• Option 2: Other galaxies being far from Earth means vast distances, requiring huge energy, time, and advanced tech to reach—this is a major hurdle for space exploration.
• Option 3: The speed of light can be measured (e.g., in labs or via astronomical methods), so this is incorrect.
• Option 4: There are stars outside our solar system (e.g., in other galaxies), so this is false.

Answer:

B. Other galaxies are very far away from Earth.