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Question 1: Instead, spectacular ________ were seen in 1872 and 1885 when the comet should have been visible.
LeonidsHalley's CometMeteoroidMeteor shower

Question 2: In addition, comets can be ejected by interacting with another object in the solar system (see Perturbation), such as ________.
Io (moon)Callisto (moon)JupiterGanymede (moon)

Question 3: As a comet approaches the ________, solar radiation causes the volatile materials within the comet to vaporize and stream out of the nucleus, carrying dust away with them.
Solar SystemEarthPlanetSun

Question 4: ________ are generally defined as having orbital periods of less than 200 years.
Lost cometList of non-periodic cometsCentaur (minor planet)List of periodic comets

Question 5: In 1705, ________ applied Newton's method to twenty-three cometary apparitions that had occurred between 1337 and 1698.
George Biddell AiryEdmond HalleyNathaniel BlissMichael Atiyah

Question 6: [37] The detection of organic molecules in comets has led some to speculate that comets or ________ may have brought the precursors of life—or even life itself—to Earth.
Impact craterImpact eventMeteoriteMeteoroid

Question 7:
What role did Comet play in the telemovie The Adventures of Brisco County Jr.?
Lord Bowler
Francis Kilbride
Comet
Brisco County Jr.

Question 8: They are composed of rock, dust, water ice, and frozen gases such as carbon monoxide, carbon dioxide, methane and ________.
HydrogenChlorineAmmoniaNitrogen

Question 9: In 1681, the Saxon pastor Georg Samuel Doerfel set forth his proofs that comets are heavenly bodies moving in ________ of which the sun is the focus.
ArchimedesParabolaConic sectionEllipse

Question 10: The Danish astronomer ________ used measurements of the comet's position taken by himself and other, geographically separated, observers to determine that the comet had no measurable parallax.
Johannes KeplerSunHeliocentrismTycho Brahe
















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