What is unique about the recently discovered rogue planet?

• It is the first planet found without a stellar system.

• It orbits two stars simultaneously.

• It has a solid surface like Earth.

• It is the largest planet ever discovered.

What is the estimated age of the rogue planet found among the AB Doradis Moving Group?

• 50 to 120 million years

• 200 to 300 million years

• 500 to 600 million years

• 10 to 20 million years

What is the main difference between brown dwarfs and planets?

• Brown dwarfs can fuse some nuclei like helium 3 and lithium.

• Planets are always larger than brown dwarfs.

• Brown dwarfs can fuse hydrogen.

• Planets have a solid core.

How has the discovery of the rogue planet affected the definition of a planet?

• It proved that planets must have a solid surface.

• It suggested that planets can exist without orbiting a star.

• It confirmed that all planets must orbit a star.

• It showed that planets must be larger than brown dwarfs.

Which of the following is NOT a suggested name for the rogue planet?

• Interstellar planet

• Orphan planet

• Galactic planet

• Nomad planet