SETI IIT Indore - quiz 2

How many parameters are there on the right-hand side of the Drake equation?

• 5

• 6

• 7

• 8

• 9

Which of these is the most resonable estimate for the number of Solar-type stars formed in the Milky Way each year?

• 0.01

• 1

• 100

• 10000

• 1000000

Which effects are the Moon believed to have on Earth? Mark all correct answers!

The Moon...

• Stabilizes the angle of Earth's rotational axis

• Speeds up the rotation of Earth

• Increases continental drift

• Protects Earth from asteroids

• Gives us stable seasons

Which option best describes the diameter of the Milky Way?

• 10 lightyears

• 10000 lightyears

• 100 000 lightyears

• 1 million lightyears

• 10 million lightyears

Which statements about the transit method are correct? (Mark all correct answers)

• The transit method can be used for all stars

• The transit method can be used to detect black holes

• Small exoplanets are easier to detect than large

• Large exoplanets are easier to detect than small

• Transiting exoplanets temporaritly make their host stars disappear

What are Kirkwood gaps?

• Regions in the main asteroid belt where there are fewer asteroids

• Gaps between the planets in the Solar System

• Gaps between Sun spots

• Gaps between the rings of Saturn

• Gaps in the Oort cloud

Which option best describes the Zoo scenario?

• Aliens are monitoring us and keep us isolated from the Galactic Club

• Aliens think we are as primitive as Zoo animals and don't bother contacting us

• We live in a computer simulation called "the Zoo", created by aliens

• All extraterrestrial species are at the intellectual level of Zoo animals

• Aliens consider our habits of keeping animals caged very cruel, and therefore think of us as cosmic vermin

Which options best describe the Fermi paradox? The apparent contradiction between... (mark all correct answers)

• The properties of Solar system planets and those of exoplanets

• The supposedly large number of civilizations in the Milky Way and the lack of evidence of alien visiting us

• Ufology and the scientific search for life in outer space

• The size of the Milky Way and the size of the Solar System

• The supposedly large number of civilization in the Milky Way and the lack of signals from such civilizations

Which option best describes the berzerker scenario?

• A hostile species is attacking all other civilizations they can locate

• A hostile species is transmitting messages to trick others into visiting their planet

• A hostile species travels back in time to destroy other civilizations before they grow too powerful

• A shape-shifting species is infiltrating other civilizations without their knowledge

• A hostile species is visiting other planets, dressed up as clowns, and kills for fun

Which option best describes the gray goo scenario?

• Nanobots run amok and turn everything they can find into new nanobots

• A runaway greenhouse effect is turning exoplanet surfaces into gray goo

• Aliens with poor waste management pollute exoplanets with gray goo

• As stars evolve, their planets eventually turn into gray goo

• Planets develop intelligence, eventually becoming giant brains