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- 1. Multiple Choice
Alien planets are faint, far away, and sitting right on top of their parent star, so it's difficult to get ___indirect evidencedirect evidenceanecdotal evidencecircumstantial evidence - 2. Multiple ChoiceThe small movement of a star due to an orbiting planet is called ___centripetal motionreflexive motionretrograde motioncentrifugal motion
- 3. Multiple ChoiceThe first confirmed detection of planets outside our solar system occurred in which year?1952197219922012
- 4. Multiple ChoiceA planet outside of our solar system that orbits a star is officially called ___an alien planetan exoplaneta martian planeta distant planet
- 5. Multiple ChoiceThe first discovery of an exoplanet orbiting a star very much like the Sun occurred in the year ___1955197519952015
- 6. Multiple ChoiceAs the host star of the exoplanet makes its little circle, its light will undergo a ___polarization shiftreflexive shiftMach shiftDoppler shift
- 7. Multiple ChoiceA more massive planet pulls harder on the star, making it move ___more quicklymore slowlyerraticallyimperceptibly
- 8. Multiple ChoiceGiant gaseous exoplanets that orbit very close to their parent star are called ___"hot Jupiters""quick Saturns""short period Saturns""high rate Jupiters"
- 9. Multiple ChoiceWhen a planet passes directly in front of its star, the event is called ___a transiten passanta transitiona permutation
- 10. Multiple ChoiceThe beauty of transiting exoplanets is that the amount of starlight blocked tells you ___how far away the planet ishow big the planet isthe density of the planetthe mass of the planet
- 11. Multiple ChoiceIf we know the planet's mass from the star's Doppler shift, we can use the planet's size to calculate ___its distanceits densityits luminosityits apparent brightness
- 12. Multiple ChoiceA gas giant like Jupiter has a relatively ___low masshigh masslow densityhigh density
- 13. Multiple ChoiceDesigned to detect exoplanet transits, NASA launched a space-based telescope, in 2009, named ___Keplerthe Hubble Space TelescopePlanckthe James Webb Space Telescope
- 14. Multiple ChoiceIn what year was the first direct evidence, a picture, of an exoplanet released?1984199420042014
- 15. Multiple ChoiceThe smallest exoplanet found is ___not much bigger than Earth's moonabout the size of Mercuryabout the size of Marsnot much smaller than Earth
- 16. Multiple ChoicePlanets bigger than Earth, but smaller than Neptune are called ___"Mini-Neptunes""Super-Earths""Neptune Dwarfs""Earth Giants"
- 17. Multiple ChoiceLike Tatooine in the Star Wars saga, we've even found planets orbiting ___massive blue starscool red dwarfsred giantsbinary stars
- 18. Multiple ChoiceWe've seen so many exoplanets now that we can confidently estimate numbers by ___extrapolationinterpolationMonte Carlo methodsBayes estimation
- 19. Multiple ChoiceHow many exoplanets are estimated to be in our galaxy alone?millionshundreds of millionsbillionshundreds of billions
- 20. Multiple ChoiceWhat is the minimum condition when stating that there are "10 billion Earth-like planets in our galaxy"?temperatures where liquid water could exista similar atmosphere to Eartha strong magnetic fieldliquid water exists on their surface
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