References in the Sky

References in the Sky

Periscope Trivia Contest

On Monday’s Periscope broadcast this week our Trivia contest was about references in the sky. Reference points and Reference lines: the structure we impose on the celestial sphere to describe position and motion.

Here are your questions, with the correct answers and winners listed at the end. How many can you get right?

  1. What do scientists call the point on the celestial sphere directly above an observer?

    Screen Shot 2018-02-05 at 3.02.17 PM.png
    Zenith on Stellarium from Greensboro,    February 5, 2018 at 16:32:40.
  2. What do we call the point on the celestial sphere directly opposite the zenith?

  3. What is the name of the apparent path of the Sun among the star background over the course of a year?

  4. If you face North, this series on North-South arcs will rise on your right.

  5. What do we call the Great Circle on the celestial sphere that lies directly above the equator of Earth?

  6. What do astronomers call the point on the celestial equator from which Right Ascension is measured?

  7. Screen Shot 2018-02-05 at 3.04.52 PM
    Ecliptic (red diagonal line),                February 5, 2018 at 16:55:50.

    What is the name of the coordinate on the celestial sphere that’s the equivalent of “latitude” on Earth?

  8. What do astronomers call the point on the celestial sphere directly above the South Pole?

  9. What is the name of the line that connects the South point on the horizon with the zenith with the North point on the horizon?

  10. What direction would be described as 180 degrees azimuth?

Answers………Winners

  1. Zenith………………………….Speear40

  2. Nadir………………………….UniversalWarrior

  3. Ecliptic………………………..Speear40

  4. Right Ascension……………Speear40

  5. Celestial equator………… (no one got this one)

  6. First Point of Aries………..

                   Vernal Equinox………..UniversalWarrior

  1. Declination…………………Deknez1

  2. South Celestial Pole…….sixfootfour20

                                  …………..bowls

  3. Meridian……………..Speear40

  4. South…………………..Deknez1

 

  • Leaderboard

    Speear30……four correct (dilly dilly)

    Universal Warrior……two correct

    Deknez1……..two correct

    Bowls……..one correct

    Sixfootfour20………one corret


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s