Planet 9
Exoplanets
Interstellar Objects
Methods
Other
100
Could Pluto be considered Planet 9?
No! <3
100
What is an exoplanet?
A planet that orbits a star outside our solar system.
100
3
The number of interstellar objects we have discovered.
100
The method for finding exoplanets that has detected relatively small planet orbits
What is the transit method
100
Hot Jupiters orbiting cool stars tend to be _________
aligned.
200
How far away do we suppose Planet 9 is?
300-800 Au
200
An exoplanet with a mass higher than earth, but substantially below that of Uranus and Neptune
What is a super-earth?
200
This object was discovered on July 1st
3I/Atlas
200
This method analyzes the spectra of a star over a period of time, looking for Doppler Shift
What is the radial velocity method
200
'Close in', 'Pulled in' and 'Close encounter' are the ways in which ______ are formed.
Hot Jupiters
300
How heavy do we think Planet 9 is?
5-7 Earths heavy
300
Which of these subgroups of exoplanets are the easiest for us to detect?
Hot Jupiters.
300
True/False - An amateur astronomer has the capacity to discover an interstellar object.
True! Borisov was an amateur when he discovered 2I.
300
The method used to detect faint exoplanets that do not transit. Often uses coronographs
What is direct imaging
300
The percent of the sky that Kepler Search Space observes.
0.25%
400
True/False - The search for Planet 9 continues because we have detected perturbations on solar system planets.
False because it's too far.
400
Which satellite found the most exoplanets?
The Kepler Space Telescope
400
The color and molecular makeup of the coma was consistent with existing solar system comets.
2I/Borisov
400
The angle between the stellar spin axis and the net orbital angular momentum.
What is stellar obliquity
400
An up-and-coming technology that NASA is developing intended to help direct image.
Starshades.
500
True/False - For a ninth planet to exist, it must be large enough to be detected by all-sky surveys?
False. If the ninth planet was large enough to be detected by all-sky surveys, it would've been detected long ago. It must be small enough to be undetected.
500
True/False - the lower right quadrant is empty because planets in this range are very rare
False
500
Highly variable light curve, and accelerated out of the solar system for unknown reasons.
'Oumuamua
500
This effect can detect the way a planet orbits a star using blueshifts and redshifts of the star's light
What is the Rossiter Mclaughlin Effect
500
The furthest celestial body in our solar system.
Sedna