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Astronomical Objects

YGK These Dwarf Planets, Comets, and Asteroids

QuestionAnswer
Which dwarf planet was considered the ninth planet until 2006? Pluto.
Who discovered Pluto in 1930? Clyde Tombaugh.
Which NASA probe visited Pluto in 2015? New Horizons.
What is the name of the heart-shaped feature on Pluto? Tombaugh Regio.
In which part of the Solar System is Pluto located? Kuiper belt.
How many natural satellites does Pluto have? Five.
What is the largest moon of Pluto? Charon.
Which comet has a short orbital period of about 75.5 years? Halley’s Comet.
Who correctly predicted Halley’s Comet would return in 1758? Edmond Halley.
Which meteor shower originates from Halley’s Comet? Orionid meteor shower.
In which year did Halley’s Comet appear in the Bayeux Tapestry? 1066.
Which comet was visible to the naked eye for 18 months? Hale–Bopp.
Who co-discovered Comet Hale–Bopp? Alan Hale and Thomas Bopp.
Which planet affected Hale–Bopp’s orbit in the 1990s? Jupiter.
What element was discovered in Hale–Bopp’s tail? Sodium.
Which comet collided with Jupiter in 1994? Shoemaker–Levy 9.
Who co-discovered Shoemaker–Levy 9? Gene Shoemaker, Carolyn Shoemaker, and David Levy.
What is the distance at which tidal forces can break apart a smaller body called? Roche limit
What did Shoemaker–Levy 9 reveal about Jupiter’s atmosphere? Sulfur and deeper atmospheric layers.
Which short-period comet has an orbital period of about 6.5 years? 67P / Churyumov–Gerasimenko.
Which spacecraft orbited and landed on 67P? ESA’s Rosetta and Philae lander.
How long did Philae operate after landing? Two days.
Which isotope in 67P is three times more abundant than on Earth? Deuterium.
When will 67P return to its perihelion? April 2028.
Which is the most massive object in the asteroid belt? Ceres.
Who discovered Ceres in 1801? Giuseppe Piazzi.
Which spacecraft visited Ceres in 2015? Dawn probe.
What is the name of the cryovolcano on Ceres? Ahuna Mons.
Which asteroid belt object is the second-most massive after Ceres? Vesta.
Who discovered Vesta? Heinrich Olbers.
What giant crater is found on Vesta? Rheasilvia.
What meteorites are associated with Vesta? HED meteorites (Howardites, Eucrites, Diogenites).
Which dwarf planet was co-discovered in 2005 and is larger than Pluto? Eris.
Who discovered Eris? Mike Brown, Chad Trujillo, and David Rabinowitz.
What is the name of Eris’s moon? Dysnomia.
What is a body scattered from the Kuiper belt into a high-eccentricity orbit called in the context of Eris? "Scattered disc object"
What is the hypothetical planet that collided with Earth to form the Moon? Theia.
What is the name of the hypothesis describing the Moon’s formation? Giant Impact Hypothesis.
Which evidence supports Theia’s collision with Earth? Shock-heated meteorites and chlorine isotope differences.
What are the Large Low Shear Velocity Provinces proposed to be remnants of? Theia
Created by: divyap
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