Exoplanets and Gravitational Microlensing Quiz

What are exoplanets?

• Moons that orbit planets

• Planets that orbit our Sun

• Stars that orbit planets

• Planets that orbit stars other than our Sun

How many exoplanets have been discovered so far?

• Over 400

• Over 4,000

• Over 40,000

• Over 400,000

What is the gravitational microlensing method based on?

• The concept of gravity as a force

• The warping of space-time

• The speed of light

• The size of planets

What happens to light as it passes near a massive object according to gravitational microlensing?

• It disappears

• It bends

• It slows down

• It speeds up

What indicates the presence of an exoplanet in a microlensing event?

• A peak in a graph

• A change in color

• A sudden disappearance of light

• A decrease in light intensity