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Intro to Astronomy

カード 52枚 作成者: Najib (作成日: 2013/12/03)

  • What do each of the names for a meteor mean?

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  • 1

    What do each of the names for a meteor mean?

    補足(例文と訳など)

    答え

    • -Fireballs are at least as bright as venus in the night sky., -Bolides are bright meteors that explode in the air in a bright flash., -Shooting Star is another general name for any meteor.

    解説

  • 2

    Why don't many meteors impact the Earth?

    補足(例文と訳など)

    答え

    • They vaporize in Earth's atmosphere before they can make impact.

    解説

  • 3

    What are the Sun's absolute and apparent magnitudes?

    補足(例文と訳など)

    答え

    • Absolute magnitude +4.87, Apparent magnitude -26.7.

    解説

  • 4

    What is a second prominent meteor shower, when does it occur, where can it be found, how large is it, and from what comet does it originate?

    補足(例文と訳など)

    答え

    • -Gemini meteor shower, -Mid December, around the 13th-14th, -Appears to originate in the constellation Gemini, -Often the largest of the entire year, -Originates from 3200 Photon

    解説

  • 5

    Who was Pluto discovered by?

    補足(例文と訳など)

    答え

    • Clyde Tombaugh

    解説

  • 6

    Why do sun spots appear dark?

    補足(例文と訳など)

    答え

    • Sun spots appear dark because they are cooler than the surrounding gas due to their strong magnetic fields.

    解説

  • 7

    What is the apparent magnitude of a star?

    補足(例文と訳など)

    答え

    • The brightness of a star as seen from Earth.

    解説

  • 8

    What are "Kirkwood Gaps"?

    補足(例文と訳など)

    答え

    • Regions in the main zone where almost no asteroids are found. They are approximately 3-5 AU in size

    解説

  • 9

    How far across are interstellar clouds?

    補足(例文と訳など)

    答え

    • 250 lightyears across

    解説

  • 10

    What do you call an indention on the Earth's surface caused by a meteor crashing to Earth?

    補足(例文と訳など)

    答え

    • Impact crater

    解説

  • 11

    What was Halley's comet's shortest, longest, and average period?

    補足(例文と訳など)

    答え

    • shortest - 74 years, longest - 79, average - 75 to 76

    解説

  • 12

    What causes a "meteor shower"?

    補足(例文と訳など)

    答え

    • The Earth's movement through the orbit of remnant debris from a comet.

    解説

  • 13

    What are the photosphere, chromosphere, and corona?

    補足(例文と訳など)

    答え

    • The photosphere is the visible surface of the sun, The chromosphere is the lower part of the Sun's outer atmosphere that lies directly above the Sun's visible surface., The corona is the outer, hottest part of the Sun's atmosphere.

    解説

  • 14

    What is Pluto's number?

    補足(例文と訳など)

    答え

    • 134340

    解説

  • 15

    What are the classifications of asteroids and what is the criteria for these classifications?

    補足(例文と訳など)

    答え

    • By examining the spectra of light reflected asteroids, they are classified as follows:, C - Dark, probably carbon-containing (carbonaceous), S - Twice as bright as C, probably made of stony iron (silicate-rich), M - Similar to iron meteorites (metal-rich)

    解説

  • 16

    What is the definition of a Comet?

    補足(例文と訳など)

    答え

    • A relatively small, sometimes active object, which is composed of dirt and ices. Comets are characterised by dust and gas tails when in proximity to the Sun. Far from the Sun it is difficult to distinguish an asteroid from a comet.

    解説

  • 17

    What does a comet have that meteors and asteroids don't?

    補足(例文と訳など)

    答え

    • A coma (a cloud of glowing hot gas surrounding a comet) and a dust tail

    解説

  • 18

    What does a star's color indicate about it's temperature?

    補足(例文と訳など)

    答え

    • Red stars are cooler, and Blue to Blueish-white stars are hotter.

    解説

  • 19

    What is one of the most famous impact craters in the world and where is it located?

    補足(例文と訳など)

    答え

    • The Barringer Crater near Winslow, Arizona

    解説

  • 20

    What are two of the asteroids that are located between 2-4 au from the sun in the "main belt"?

    補足(例文と訳など)

    答え

    • Gaspra and Ida

    解説

  • 21

    What was the name of the first asteroid ever discovered?

    補足(例文と訳など)

    答え

    • Ceres

    解説

  • 22

    Where do short-period comets originate from?

    補足(例文と訳など)

    答え

    • The kuiper belt

    解説

  • 23

    What are the different names or types of meteors?

    補足(例文と訳など)

    答え

    • Fireball, Bolide, and Shooting Star

    解説

  • 24

    What are the 5 main types of stars?

    補足(例文と訳など)

    答え

    • novas, white dwarf stars, main sequence stars, cepheid variable stars, red giant stars

    解説

  • 25

    What is the current mission to investigate Pluto and the Kyper belt?

    補足(例文と訳など)

    答え

    • New Horizons

    解説

  • 26

    What is Pluto's largest moon?

    補足(例文と訳など)

    答え

    • Charon

    解説

  • 27

    When and by whom were Kirkwood Gaps discovered?

    補足(例文と訳など)

    答え

    • Discovered in 1866 by Daniel Kirkwood

    解説

  • 28

    What are the characteristics of a planet? (Definition)

    補足(例文と訳など)

    答え

    • must be in orbit around the sun, must be spherical in shape, must have "cleared it's neighborhood (orbit)"

    解説

  • 29

    Which direction does a comet's tail point?

    補足(例文と訳など)

    答え

    • The tail always points away from the sun.

    解説

  • 30

    Who discovered Pluto's largest moon?

    補足(例文と訳など)

    答え

    • Jim Christy

    解説

  • 31

    What is the oort cloud?

    補足(例文と訳など)

    答え

    • A swarm of trillions of icy bodies that lie far beyond Neptune's orbit.

    解説

  • 32

    Which layer of the Sun is the hottest and how do we know this?

    補足(例文と訳など)

    答え

    • The corona is the hottest layer and it's temperature is determined by its spectral color using Wein's law.

    解説

  • 33

    Where was the person who discovered Pluto originally from?

    補足(例文と訳など)

    答え

    • Streator, IL.

    解説

  • 34

    Where do long-period comets originate from?

    補足(例文と訳など)

    答え

    • The oort cloud.

    解説

  • 35

    What is one prominent meteor shower, when does it occur, where can it be found, how large is it, and from what comet does it originate?

    補足(例文と訳など)

    答え

    • -Perseid meteor shower, -Mid August, around the 12th-13th, -Appears to originate in the constellation Perseus, -Produces upwards of 60 meteors/hr, -Originates from the Swift-Tuttle comet

    解説

  • 36

    What is a short-period comet?

    補足(例文と訳など)

    答え

    • A comet that takes less than 200 years to complete it's orbit.

    解説

  • 37

    What is the definition of a meteor?

    補足(例文と訳など)

    答え

    • A meteoroid that has penetrated further into the atmosphere leaving behind a trail of dusty gas.

    解説

  • 38

    What are the characteristics of a dwarf planet? (Definition)

    補足(例文と訳など)

    答え

    • must be in orbit around the sun, must be spherical in shape, must have "cleared it's neighborhood (orbit)", did NOT "clear it's neighborhood (orbit)", must not be a moon"

    解説

  • 39

    What are the parts and respective sizes of a comet?

    補足(例文と訳など)

    答え

    • Icy Nucleus - .6 - 6 miles , Coma - 60,000 miles, Hydrogen Envelope - 6 million miles, Tail - 60 million miles

    解説

  • 40

    How long does it take to form a star?

    補足(例文と訳など)

    答え

    • 1/2 a lightyear

    解説

  • 41

    What is the definition of a meteoroid?

    補足(例文と訳など)

    答え

    • Rocky and metallic debris, smaller than asteroids, scattered in the solar system. Most are smaller than 1mm.

    解説

  • 42

    On a typical night, how often can you expect to see a meteor in the sky?

    補足(例文と訳など)

    答え

    • About every 10 minutes

    解説

  • 43

    What are the classifications of meteorites?

    補足(例文と訳など)

    答え

    • Iron meteorites - fragments of an asteroids core, Stones - fragments of an asteroids crust, Stony Iron - fragments of an asteroids mid region

    解説

  • 44

    What is the absolute magnitude of a star?

    補足(例文と訳など)

    答え

    • The brightness of a star supposing that it was located exactly 10 parsecs, or 32.6 light years away from Earth.

    解説

  • 45

    What is the definition of an asteroid?

    補足(例文と訳など)

    答え

    • Any of numerous small celestial bodies varying in size, that revolve around the sun, with orbits lying chiefly between Mars and Jupiter that are not planets, moons, or comets. Also called planetoids.

    解説

  • 46

    What is the definition of a meteorite?

    補足(例文と訳など)

    答え

    • Space debris that reaches the Earth's surface completely intact.

    解説

  • 47

    Who discovered the first asteroid?

    補足(例文と訳など)

    答え

    • Giuseppe Piazzi

    解説

  • 48

    Where did the person who discovered Pluto work at the time it was discovered?

    補足(例文と訳など)

    答え

    • Lowell University Laboratory in Arizona

    解説

  • 49

    At how many AU from the sun do a comet's coma and tail form?

    補足(例文と訳など)

    答え

    • The coma forms at 3 AU and the tail forms at 1 AU

    解説

  • 50

    When was Pluto discovered?

    補足(例文と訳など)

    答え

    • 1930

    解説

  • 51

    What is a long-period comet?

    補足(例文と訳など)

    答え

    • A comet that takes more than 200 years to complete it's orbit.

    解説

  • 52

    What are the names of Pluto's Moons?

    補足(例文と訳など)

    答え

    • Charon, Hydra, Nix, P4, and P5.

    解説

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