How to Find an Exoplanet

Why is it difficult to directly observe exoplanets?

• Stars emit too much radiation.

• Exoplanets move too quickly to be captured.

• Stars are too bright and far away compared to their planets.

• Exoplanets are too small to be seen.

What is one indirect method used to discover exoplanets?

• Counting the number of stars in a galaxy.

• Observing the dimming of a star as a planet passes in front.

• Listening for radio signals from planets.

• Measuring the temperature of a star.

How does a planet's gravitational effect help in its discovery?

• It makes the star disappear temporarily.

• It causes the star to wobble slightly.

• It changes the color of the star.

• It increases the star's brightness.

Why are indirect methods more effective at finding large planets close to their stars?

• Because they emit more heat.

• Because they have unique colors.

• Because they block more light and cause greater star wobble.

• Because they are easier to see with telescopes.

As of 2014, how many exoplanets have been discovered using various methods?

• Over 2500

• Over 1000

• Over 500

• Over 1800