Astronomy Pop Quiz on Nearby Stars

Today we have seven quiz questions, so we will take seven minutes to complete the quiz.

With that in mind, ladies and gentlemen, please get out a clean sheet of paper and a No. 2 pencil and prepare for today’s Astronomy Pop Quiz.

DMG procedures and expectations apply; 1) if you find a mistake, please let me know, and b) do your best.

The topic today: Nearby Stars

IMG_3093 2
Link here to RASC

You have seven minutes to complete the quiz. Begin now.

  1. Be warned, this is a trick question: Name the star that’s closest to us.

  1. Name the star closest to our solar system.

    Picture 2
    2012 transit of Venus thru a telescope.

  1. What is the relationship of the star in question number two with the second and third closest stars?

  1. Think of our neighborhood as a sphere with a radius of 5 parsecs, or 16.3 light years.  How many stellar systems are there in our neighborhood?

Screen Shot 2018-07-09 at 9.34.52 PM.png

  1. What Spectral Type star dominates our neighborhood?  In other words, what is the most common Spectral Type within within 5 parsecs? In our neighborhood, 73% of the stars are this Type.

  1. How many of the 48 Spectral Type M stars (red dwarfs) in our neighborhood are visible from Earth without a telescope?

  1. There are no Type O stars (the very hottest around 50,000 K) nor Type B stars (up to 28,000 K) in our neighborhood. Name the one and only Spectral Type A star in our neighborhood.

  2. During the broadcast, one live viewer brought up that he wondered how I could teach about space if I’ve never been, that the Moon and Sun are in our atmosphere, that I’m a member of the illuminati, that all astronauts are Free Masons, that Buzz Aldrin assaults people because he’s hiding something, that creationism is greater than evolution, and that NASA is a Hebrew word that means deceiver.  Is he a troll, a heckler, a ne’er-do-well with low self esteem and no confidence?

OK, pencils down. Let’s trade with a neighbor and check one another. Here are the correct answers and your “neighbor” who got the correct answer on my Periscope broadcast on July 09, from 8:00 am (eastern US) to 9:00.

Correct Answers……..Periscope Winners:

  1. The Sun……. @butt_zit: Many forget that our Sun is also a star. It’s about 93 million miles away. That’s far enough that light takes almost 8 ½ minutes to get to us. Our star has an surface temperature of 5780 K.

  1. Proxima Centauri…….. @spaceguy1:  According to the Observer’s Handbook 2018, this Spectral type M star is only 4.24 light years away from us. That means the light from this star travels for more than 4 years to get to us.

  1. Part of a multi-star system….………@JACOBtheFirst: Proxima Centauri (see #2 above) is gravitationally bound two these other two stars; they are part of the same star system. These two components are 4.36 light years away from us. A is a Spectral type G (similar to our Sun) and B is a Spectral Type K.

  1. 52…………….@JamesOn215: These 52 known systems include stars (66), brown dwarfs (8), and exoplanets (16) plus our 8 planets.  Of the 66 stars, 5 are White Dwarfs.

  1. Spectral Type M………..@cooliotrickster: Spectral Type M stars are the coolest stars, the ones with the least mass. In our neighborhood (diameter of 5 parsecs) 48 of the 66 stars are Spectral Type M.

Screen Shot 2018-07-09 at 9.27.57 PM
Click here for a great movie about the HR Diagram
  1. None of them.……….. @spaceguy1: These Type-M stars are so cool, they emit very little light. We cannot see any of them without a telescope.

  1. Sirius……….. @Ludde_Brandt: The hottest, brightest star in our neighborhood, Sirius is also the brightest star in our night sky. As a Type A, it is intrinsically bright, and since it’s in our neighborhood (8.58 light years) it appears very bright in our sky.

  2. I think so…… @birdmoth:  Amazing how you can magically tell what other people are thinking.  Sort of makes you god-like in your own mind, doesn’t it?  You may want to have that checked.

Screen Shot 2018-07-09 at 9.46.40 PM
Portrait of @birdmoth by Kurt Vonnegut, Jr.

Winners: make a contribution in the next 30 days to one of my charities listed on my blog and I will match your gift, up to $100. Tell the charity to contact me about your contribution.

Astronomy Pop Quiz topic: Nearby Staars

Winners posted on July 09, 2018

You are welcome to play with us during the next live broadcast of

“Let’s talk astronomy” this coming Monday beginning at 8 am eastern US time on Periscope.Screen shot 2015-12-28 at 8.16.26 PM

Periscope is a live video streaming app for Android and iOS available in the App Store.

Winners on my live show astronomy-related trivia questions correct will qualify for:

  1. Eternal Glory (yea!)

  2. International Reknown, and…

            drum roll, please…….

  1. An opportunity to increase your impact on making the world a better place.

How to increase your impact:

  1. correctly answer a trivia question participating in the live Periscope broadcast.

  2. Make a contribution within 30 days of publication of the Leader Board to one of the charities listed on my blog. You can find the list of my charities on the page “Want to Show Support?” pull down menu found on the home page of my blog.

Link here.

  1. Have the charity contact me to tell me the amount of your gift, and I will match it up to $100.

On Monday, July 9, 2018, our Periscope Trivia Contest was about nearby stars. The questions, the correct answers and the winners are given above. Congratulations to all winners and thank-you to all participants.

When you get the first correct answer to one of my questions, you are a winner. I usually have between five and ten trivia questions each Monday.

To the winners go Eternal Glory, World-wide declaration of their victories (on my blog), and an Opportunity to double their impact of making the world a better place.

You are welcome to join in the hour long fun most Mondays beginning around 8 am eastern time. With Periscope you can watch an earlier trivia game broadcast or participate in the next live Astronomy Pop Quiz   Periscope is a social media app available in the App store.

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