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Thread: Astronomy Quiz!

  1. #1
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    Astronomy Quiz!

    I was bored so I decided to make one of these. I'll make sure people like Andromeda321 don't ace this one. :wink: 15 questions, if you google or use references, take off 15 points from your final score.

    1. Why is the solar day 4 minutes longer than the sidereal day, and how would the solar day change in respect with the sidereal day, if the Earth began to rotate in the opposite direction, at the same time?

    2. Why is Saturn emit more than three times the energy it receives from the sun (name the main process, and why it isn't significant in Jupiter)

    3. What star cluster is Aldebaran a part of?

    4. What does the emission at 656.3 nm correspond to?

    5. What is the second brightest globular cluster in terms of apparent magnitude?

    6. What are the two hydrogen-helium fusion mechanisms?

    7. What is the official name of Beta Cygni?

    8. What is the official name of the star that is shared by both Pegasus and Andromeda?

    9. What are the smallest and largest constellations, defined by modern boundaries?

    10. Which constellations are the North and South Galactic Pole located in?

    11. What is Alpha Hydra (the brightest star in Hydra?)

    12. What is the name of the Moon's largest maria?

    13. What was the first spacecraft to land on the Moon?

    14. What is the name of Ida's moon?

    15. What wavelength of radiation is used to probe areas where there is lots of interstellar dust, and why?

  2. #2
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    Without googling, I'll take a stab at some of them.
    1. The Earths motion around the sun causes the differance in the length of sidereal and solar day, I would guess that if Earth started rotating backwards then the solar day would be 4 minutes shorter.

    2. Saturn is still emitting primordial heat. Why it's not significant on Jupiter, ?

    3. Aldebaran is not part of any cluster, it is a forground star that appears to be part of the Hyades.

    4. Homer Simpsons IQ?

    5. M-13?

    6. ?

    7. Alberio

    8. ?

    9. Ursa Major and Musca?

    10. ?

    11. ?

    12.Mare Imbrium

    13. Lunakhod

    14. Dactyl

    15. ?

    There, no googling.

  3. #3
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    Quote Originally Posted by Walter
    2. Saturn is still emitting primordial heat. Why it's not significant on Jupiter, ?
    Actually, Jupiter is the one still contracting, and therefore still drawing upon Primoidal Resources, namely its Bulk.

    Saturn however, Derives Energy from the Separation of Helium from the Lighter Hydrogen, and its descent towards the Planet's Core.

    As Jupiter is still Deriving heat from its Contraction, its Gasses are Still at Equilibrium.

  4. #4
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    11. Its a double star.
    15. Radio waves? Because they can penetrate areas of interstellar dust and gases.

    I knew some of the ones Walter said but then he beat me to it. But those were like 2 total. That means I made my way through just 4 answers. I feel bad for myself. Should start gdoing something else besides playing Call of Duty on the computer .

  5. #5
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    1.
    2.
    3. Aldebaran isnt part of a cluster... but ill say Hyades
    4. 656.3 nm is H-Alpha!
    5. NGC... 104? i know M-13 is the brightest
    6.
    7. Albereto
    8. its Alpherits? somthing or other
    9. Crux... and probably Hydra for the largest
    10. North - lil' dip (ursa minor)... south- no idea
    11.
    12.Copernicus
    13. Apollo 11... but thats probably a trick question, so ill change my answer to "eagle"
    14. As far as i know, its just "Ida's Moon", but i might be wrong
    15. probably some reddish color. because its pretty - (long wavelenghts)

    i hope i didnt just do somebodys homework

    [edit- cause i forget stuff]

  6. #6
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    I knew Lunakhod. I remember it crashing down.

    As for the rest...

    I'm thick!

  7. #7
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    Lunakhod??? ah! im way too young for this stuff! thats no fair. the question is invalid! [-(

  8. #8
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    This is not the answer to any of the questions, just an interesting tidbit.

    On January 10th., 1946 the US Army Signal Corps bounced radar of the Moon.

    For question 13, we need a definition of "landing," according to my research (the space almanac), the Luna 2 probe crashed into the moon on September 13, 1959--is that considered "landing"?

    The Lunar 9 probe was the first soft landing on the Moon. It landed on Feburary 3, 1966 (it landed on Oceanus Procellarium).

  9. #9
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    Yeah, the first contact with a spacecraft. So crash-landings count.

  10. #10
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    Quote Originally Posted by Brady Yoon
    1. Why is the solar day 4 minutes longer than the sidereal day, and how would the solar day change in respect with the sidereal day, if the Earth began to rotate in the opposite direction, at the same time?
    When you say "at the same time," I assume you mean "at the same angular speed"?
    Quote Originally Posted by Walter
    Without googling, I'll take a stab at some of them.
    1. The Earths motion around the sun causes the differance in the length of sidereal and solar day, I would guess that if Earth started rotating backwards then the solar day would be 4 minutes shorter.
    If you meant, 4 minutes shorter than the sidereal day (about eight minutes shorter than currently), then I would agree.

  11. #11
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    Quote Originally Posted by Brady Yoon
    I was bored so I decided to make one of these. I'll make sure people like Andromeda321 don't ace this one.
    Now now, what's this supposed to mean? [insert little whistling emoticon which doesn't seem to be working here]
    1. Why is the solar day 4 minutes longer than the sidereal day, and how would the solar day change in respect with the sidereal day, if the Earth began to rotate in the opposite direction, at the same time?
    This has to do with the discrepancy between the modern calendar and the period of the Earth's orbit. If it went backwards, hmmm... get back to me.
    3. What star cluster is Aldebaran a part of?
    The Hyades (sp?) cluster
    4. What does the emission at 656.3 nm correspond to?
    My good old friend seen in the 21cm line, hydrogen alpha.
    5. What is the second brightest globular cluster in terms of apparent magnitude?
    If Omega Centauri would be the first, then M13 is the second... I don't think that one in Sagittarius is brighter but I may be wrong.
    6. What are the two hydrogen-helium fusion mechanisms?
    I'm not quite certain what it is you're asking here...
    7. What is the official name of Beta Cygni?
    Well Beta Cygni IS an official name. :wink: Ok, I'll tell you what you came for, Albiero.
    8. What is the official name of the star that is shared by both Pegasus and Andromeda?
    Apheratz (sp?)
    9. What are the smallest and largest constellations, defined by modern boundaries?
    Biggest is Hydra, smallest is Crux.
    10. Which constellations are the North and South Galactic Pole located in?
    North is in Cygnus or thereabouts, I'm not sure of South.
    11. What is Alpha Hydra (the brightest star in Hydra?)
    Aphard I think
    13. What was the first spacecraft to land on the Moon?
    Luna 2 crash landed... it didn't survive, yes, but it did touch the moon!
    14. What is the name of Ida's moon?
    Dactyl
    15. What wavelength of radiation is used to probe areas where there is lots of interstellar dust, and why?
    The land of infrared has proven to be good for this, I don't think there's any specific length used though.

  12. #12
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    Quote Originally Posted by earthman2110
    10. North - lil' dip (ursa minor)... south- no idea
    That's the Earth's north pole, not the galaxy's
    Quote Originally Posted by earthman2110
    i hope i didnt just do somebodys homework
    I have a feeling Brady could do these faster than he can type them into the BABB.
    Quote Originally Posted by Andromeda321
    10. Which constellations are the North and South Galactic Pole located in?
    North is in Cygnus or thereabouts, I'm not sure of South.
    North is in Como Berenices, South is in Sculptor

  13. #13
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    1. The difference is because as earth rotates, it's also moved further along in its orbit around the sun.

    2. Guessing, mumble mumble magnetic fields ?

    3. Hyades

    4.pass

    5. I reckon it has to be 47 Tucana

    6. pass

    7.pass

    8. pass

    9. largest Hydra..smallest Crux

    10. nth galactic pole Coma Berenices
    sth galactic pole Sculptor

    11. a red giant ?

    12. Oceanus Procellarum

    13. pass

    14. pass

    15. pass

  14. #14
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    Re: Astronomy Quiz!

    Ooh, goody. I love quizzes! =D>

    Quote Originally Posted by Brady Yoon

    1. Why is the solar day 4 minutes longer than the sidereal day, and how would the solar day change in respect with the sidereal day, if the Earth began to rotate in the opposite direction, at the same time?
    Because of the Earth's orbit around the sun. Unless you are Oriel36.
    If the Earth rotated in the opposite direction, the solar day would be shorter than the sidereal day.

    2. Why is Saturn emit more than three times the energy it receives from the sun (name the main process, and why it isn't significant in Jupiter)
    I would guess that there is either a contraction or differentiation mechanism in play. Couldn't say exactly what, though.

    3. What star cluster is Aldebaran a part of?
    None. But it is in a rough line of sight with the Hyades.

    4. What does the emission at 656.3 nm correspond to?
    Hydrogen Alpha.

    5. What is the second brightest globular cluster in terms of apparent magnitude?
    My guess for the second brightest would be 47 Tucanae. Brightest is easily Omega Centauri (which is visible to the naked eye from my backyard. :wink: )

    6. What are the two hydrogen-helium fusion mechanisms?
    Proton-proton and CNO.

    7. What is the official name of Beta Cygni?
    What's wrong with Beta Cygni? :wink: Albireo.

    8. What is the official name of the star that is shared by both Pegasus and Andromeda?
    That's Alpheratz, I think.

    9. What are the smallest and largest constellations, defined by modern boundaries?
    Hydra and Crux.

    10. Which constellations are the North and South Galactic Pole located in?
    The southern is in Sculptor. I can't remember the Northern.

    11. What is Alpha Hydra (the brightest star in Hydra?)
    Alphard, the solitary one.

    12. What is the name of the Moon's largest maria?
    Mare, Imbrium. Oceanus, Procellarum. The Aitken Basin is pretty immense as well.

    13. What was the first spacecraft to land on the Moon?
    Luna 2. Hard.

    14. What is the name of Ida's moon?
    Dactyl.

    15. What wavelength of radiation is used to probe areas where there is lots of interstellar dust, and why?
    IR. IR radiation penetrates interstellar dust far more efficiently than visible wavelengths.

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