Trivia — August 15, 2025 | Exoplanet Slacker

17. In exoplanet studies, what does the term “orbital inclination” refer to?

A) The tilt of the planet’s rotation axis
B) The angle between the planet’s orbital plane and our line of sight
C) The eccentricity of the planet’s orbit
D) The alignment of the planet’s magnetic field

Answer: B) The angle between the planet’s orbital plane and our line of sight
The orbital inclination determines how we observe the planet’s movement—critical for detecting transits.

18. What is meant by an exoplanet being in a “resonant orbit”?

A) Its orbit matches the rotation rate of its host star
B) Its orbit is in a simple integer ratio with another planet’s orbit
C) It has an eccentric orbit that changes due to tidal forces
D) It oscillates in brightness due to its atmospheric composition

Answer: D) It oscillates in brightness due to its atmospheric composition
Some exoplanets’ brightness changes periodically due to cloud patterns, heat distribution, or atmospheric chemistry.

19. What is the main difference between Type Ia and Type II supernovae?

A) Type Ia are caused by exploding white dwarfs; Type II result from the collapse of massive stars
B) Type Ia occur only in elliptical galaxies; Type II occur only in spiral galaxies
C) Type Ia produce more hydrogen than Type II
D) Type Ia are dimmer and shorter-lived than Type II

Answer: A) Type Ia are caused by exploding white dwarfs; Type II result from the collapse of massive stars
Scientifically Type Ia lack hydrogen lines while Type II show them.

20. What is an active galactic nucleus (AGN)?

A) The core of a galaxy containing a supermassive black hole that emits large amounts of energy
B) A dense cluster of neutron stars at the center of a galaxy
C) The rotating disk of young stars in the galactic core
D) The remnant of a galaxy that has merged with another

Answer: A) The core of a galaxy containing a supermassive black hole that emits large amounts of energy
An AGN’s extreme luminosity comes from matter accreting onto the black hole, producing radiation across the electromagnetic spectrum.

Bonus: What makes NASA’s Pandora mission uniquely suited to disentangling stellar variability from exoplanet transit signals?

A) It uses a coronagraph to block out starlight for direct imaging
B) It observes exoplanet systems from two different planets simultaneously
C) It observes an exoplanet system continuously for at least 24 hours, repeating the process 10 times
D) It only targets stars without sunspots or variability

Answer: C) It observes an exoplanet system continuously for at least 24 hours, repeating the process 10 times
Pandora simultaneously measures the star’s light in visible and infrared wavelengths for an entire 24-hour span, returning to observe the same system multiple times. This long-duration, repeated approach allows scientists to characterize how the star’s own variability (spots, flares, faculae) affects the measured transit depth, improving the accuracy of exoplanet atmosphere studies.