Nearby Stars, part 2

 

How much do you know about astronomy? How about our nearest stars?

Of course, the star closest to us is the Sun, but how about the others?

Today we have challenging questions about our stellar neighbors based on the IMG_3761article “The Nearest Stars” by Todd J. Henry in the Observer’s Handbook 2019.

I created five questions that could be answered without reading this chapter.

You have up to five minutes to complete the challenge today.

Begin now. Do your best.

  1. What’s the name of the only A-type star within 5 parsecs?
  2. What’s the name of the only type-F star within 5 pc?
  3. Both Sirius and Procyon have companion stars. What are they?
  4. What is the name of the nearby star circled by a band of cold dust and at least one and possibly three planets?
  5. What is the name of the close star that has the largest radial velocity?
  6. How man of the nearby stars. Including our Sun, are visual magnitude 6 or brighter?

Screen Shot 2018-01-22 at 9.49.51 AM

OK, pencils down. Scroll down for directions for checking your answers.

Please read directions below:

Step 1: Please contribute to one of these charities linked below. If you are a winner and contribute, please ask recipient to notify me of the amount so I might match the first $100.

  1. Michael J. Fox Foundation for Parkinson’s Research

https://www.michaeljfox.org/


fullsizeoutput_13f0

 

Click on “Get Involved”

  1. Guilford County Animal Shelter

       http://www.myguilford.com/animal-services/animal-shelter/

Look under “Donate to the Animal Shelter.”Screen Shot 2018-09-02 at 10.09.28 AM

  1. Guilford Senior Resources

http://senior-resources-guilford.org/

Look under “You Can Help”

  1. Jo Cline Memorial Endowment

https://www.gtcc.edu/community-engagement/cline-observatory/support-the-observatory-jo-cline.php

 

Step 2: Check your written answers to the answers below. If your answer is correct, give it a check mark.

Step 3: If your answer is wrong, put a small X.

Step 4: If you think my answer is questionable, write yourself a note, do the research and let me know if I’ve erred. Thanks in advance,

 

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.

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

On Monday, April 15, 2019, our Astronomy Challenge was about interplanetary dust.

The questions are given above, the correct answers and the winners are given below.

Congratulations to all winners and thank-you to all participants.

Play the Astronomy Challenge live on Periscope’s “ Let’s talk astronomy” 8 am (Eastern US time) on Mondays.

 

Correct Answers……..Periscope Winners:

  1. What’s the name of the only A-type star within 5 parsecs? ANSWER: Sirius…@Pircano: Sirius is less than 9 light years from Earth and it’s about 40 times more luminous than our Sun. Those two features make it the brightest star on our night sky.
  2. What’s the name of the only type-F star within 5 pc?  ANSWER: Procyon…@Pircano: This star is the brightest star on Canis Minor, while the precious star, Sirius, is the brightest star on Canis Major.
  3. Both Sirius and Procyon have companion stars. What kind of stars are they?  ANSWER: White dwarfs…@Pircano: These companion stars were once the brighter of the two in each pair. As the more massive, brighter stars of the systems, they ended their lives as hydrogen fusing stars first and evolved into these small hot objects.
  4. What is the name of the nearby star circled by a band of cold dust and at least one and possibly three planets? ANSWER: Epsilon Eridani…@Pircano: This star is a smaller version of our Sun and has been investigated by radio telescopes in the possibility we might detect signs of intelligent life.
  5. What is the name of the close star that has the largest radial velocity? ANSWER: Barnard’s Star……. @speear40:    With a visual magnitude of 9.53, this nearby star is 6.01 light years distant in constellation Ophiuchus and moves 10+ arcseconds per year on our celestial sphere.
  6. How many of the nearby stars. including our Sun, are visual magnitude 6 or brighter? ANSWER: Twelve….. @biggyz55: That’s 23%.

    fullsizeoutput_1456
    Our Sun is visual magnitude -26.7

Next challenge: 60 + 25, Lord Tyrion Lannister twice, not the daughter and approximation

If you find a mistake, please let me know.

Thanks goes out to all participants,

and

Congratulations to everyone who got one right.


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