Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Wow. 20%.
Incredible! Obviously I have more to learn. I guessed on a few and got each of them wrong. I maybe should have spent longer than 4 minutes on it.
-Michael Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50 Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl Camera: ZWO ASI 120 Naked Eye: Two Eyeballs Latitude: 48.7229° N
Is this a re-post, as the original seems to have been deleted?
Has the quiz changed at all?
For completeness I repeated (using the same wrong answers for honesty) to confirm my 70% score, but my time should be 3 minutes.
Last edited by Gfamily on Wed Nov 01, 2023 3:18 pm, edited 1 time in total.
LS8 Meade SCT, SW 127 Mak, 72mm Lightwave Refractor
Star Adventurer
AZ Gti mount www.midcheshireastro.co.uk for astro company
Well I messed that one up! I went back some questions to double check an answer then when I went forward I didn't notice that I had to re-answer the subsequent ones again as I worked back to the end. Those questions had no answers listed when the results page came up. So, I made a right mess of the whole thing! Good tough quiz Joe.
Alan
Scopes: Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob ||
ES AR127 f/6.5 || ES ED80 f/6 || Apertura 6" f/5 Newtonian
Mounts: ES Twilight-II and Twilight-I
EPs: AT 82° 28mm UWA || TV Ethos 100° 21mm and 13mm || Vixen LVW 65° 22mm ||
ES 82° 18mm || Pentax XW 70° 10mm, 7mm and 5mm || barlows
Filters (2 inch): DGM NPB || Orion Ultra Block, O-III and Sky Glow || Baader HaB
Primary Field Atlases: Uranometria All-Sky Edition and Interstellarum Deep Sky Atlas
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"Seeing is in some respect an art, which must be learnt." (William Herschel)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"No good deed goes unpunished." (various)
“Some people without brains do an awful lot of talking, don't you think?” (Scarecrow, The Wonderful Wizard of Oz)
Gordon
Scopes: Explore Scientific ED80CF, Skywatcher 200 Quattro Imaging Newt, SeeStar S50 for EAA.
Mounts: Orion Atlas EQ-g mount & Skywatcher EQ5 Pro.
ZWO mini guider.
Image cameras: ZWO ASI1600 MM Cool, ZWO ASI533mc-Pro, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC
Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm
Eyepieces: a few.
Primary software: Cartes du Ciel, N.I.N.A, StarTools V1.4.
Gfamily wrote: ↑Wed Nov 01, 2023 2:05 pm
Is this a re-post, as the original seems to have been deleted?
Has the quiz changed at all?
For completeness I repeated (using the same wrong answers for honesty) to confirm my 70% score, but my time should be 3 minutes.
Hi GFamily,
I’m not sure what you are referring to? I don’t have any control over how the quiz mechanics operate. I can edit the quiz but I would not delete and repost because that would change the url. 70% is a good score this time.
Joe
Amateur astronomer since 1978...................Web site :http://joe-cali.com/ Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80. Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's. Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12 Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec. Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
kt4hx wrote: ↑Wed Nov 01, 2023 4:48 pm
Well I messed that one up! I went back some questions to double check an answer then when I went forward I didn't notice that I had to re-answer the subsequent ones again as I worked back to the end. Those questions had no answers listed when the results page came up. So, I made a right mess of the whole thing! Good tough quiz Joe.
There should be three columns. Question, your answer, correct answer. The photos have covered some of the questions and perhaps if you do this on a mobile phone or small tablet the photos might block more. I have no control over the appearance or not of the answers. Maybe a glitch?
Joe
Amateur astronomer since 1978...................Web site :http://joe-cali.com/ Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80. Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's. Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12 Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec. Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
Gfamily wrote: ↑Wed Nov 01, 2023 2:05 pm
Is this a re-post, as the original seems to have been deleted?
Has the quiz changed at all?
For completeness I repeated (using the same wrong answers for honesty) to confirm my 70% score, but my time should be 3 minutes.
Hi GFamily,
I’m not sure what you are referring to? I don’t have any control over how the quiz mechanics operate. I can edit the quiz but I would not delete and repost because that would change the url. 70% is a good score this time.
Joe
A mystery
I was sure I'd seen the November Quiz announcement, added my 'thanks' and replied to it not long after it went up. However, when I went back to the thread, my reply had disappeared, and there was no sign of the 'thanks'.
Do I have two records of having done the Quiz?
Never mind - enjoyed the Quiz, and am happy(ish) with my score.
LS8 Meade SCT, SW 127 Mak, 72mm Lightwave Refractor
Star Adventurer
AZ Gti mount www.midcheshireastro.co.uk for astro company
kt4hx wrote: ↑Wed Nov 01, 2023 4:48 pm
Well I messed that one up! I went back some questions to double check an answer then when I went forward I didn't notice that I had to re-answer the subsequent ones again as I worked back to the end. Those questions had no answers listed when the results page came up. So, I made a right mess of the whole thing! Good tough quiz Joe.
There should be three columns. Question, your answer, correct answer. The photos have covered some of the questions and perhaps if you do this on a mobile phone or small tablet the photos might block more. I have no control over the appearance or not of the answers. Maybe a glitch?
Joe
Not a problem. In the future, if I go back to check an answer then move forward again, I will double check to make certain my previous answers are still there. I did go through it again later and had no issues. Didn't do particularly well, but I didn't go back the second time. So all is well.
Alan
Scopes: Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob ||
ES AR127 f/6.5 || ES ED80 f/6 || Apertura 6" f/5 Newtonian
Mounts: ES Twilight-II and Twilight-I
EPs: AT 82° 28mm UWA || TV Ethos 100° 21mm and 13mm || Vixen LVW 65° 22mm ||
ES 82° 18mm || Pentax XW 70° 10mm, 7mm and 5mm || barlows
Filters (2 inch): DGM NPB || Orion Ultra Block, O-III and Sky Glow || Baader HaB
Primary Field Atlases: Uranometria All-Sky Edition and Interstellarum Deep Sky Atlas
---------------------------------------------------------------------------
"Astronomers, we look into the past to see our future." (me)
"Seeing is in some respect an art, which must be learnt." (William Herschel)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"No good deed goes unpunished." (various)
“Some people without brains do an awful lot of talking, don't you think?” (Scarecrow, The Wonderful Wizard of Oz)
kt4hx wrote: ↑Wed Nov 01, 2023 4:48 pm
Well I messed that one up! I went back some questions to double check an answer then when I went forward I didn't notice that I had to re-answer the subsequent ones again as I worked back to the end. Those questions had no answers listed when the results page came up. So, I made a right mess of the whole thing! Good tough quiz Joe.
There should be three columns. Question, your answer, correct answer. The photos have covered some of the questions and perhaps if you do this on a mobile phone or small tablet the photos might block more. I have no control over the appearance or not of the answers. Maybe a glitch?
Joe
Not a problem. In the future, if I go back to check an answer then move forward again, I will double check to make certain my previous answers are still there. I did go through it again later and had no issues. Didn't do particularly well, but I didn't go back the second time. So all is well.
Hi Alan,
I tried this and finally see what you meant. I wasn't aware of this. Yes, if you use the back button to back up a few questions, you have to re-answer all the subsequent questions not just step forward. When I have performed test runs of the quiz prior to release, I have never reversed back multiple questions so wasn't aware of this.
Joe
Amateur astronomer since 1978...................Web site :http://joe-cali.com/ Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80. Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's. Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12 Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec. Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)
Hi Joe and thanks a bunch for taking the time to prepare this quiz.
I scored 40% and I’m thrilled with that!
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
You can still attempt the quiz but now that I've published the answers below, scores won't count.
A round up of the questions from this months quiz. With some comments.
Question in black text.
Answer in green
My comments in blue.
2. The most common method used by amateur mirror makers for manually grinding the curve to make a telescope mirror sees the optician using two identically sized pieces of glass with wet abrasive in between. One is the mirror that becomes concave and the other is called the tool that becomes convex. The bottom piece is held in place on a rotating table top, the top piece of glass is pushed back and forth across the fixed surface.
While removing the glass to form the curve, which surface becomes the concave mirror, the piece on top or the piece underneath?
A: The mirror sits above with the fixed tool below on the bench
When making any mirror, the edges do the cutting. When pushing two equal size pieces of glass by hand, the downward pressure over the top moving piece allows the edge of the underside to preferentially remove material from the centre of the top piece causing it to become concave. When using a faceted sub-diameter tool, the edges of the small piece are always cutting material from the mirror and the only practical way is tool on top.
3. What is the surface temperature of our Sun? A: 6,000 C / 10,800 F
The surface tempterature of the photoshere is around 6,000 C / 10,800 F although sunspots are somewhat cooler at 4,000 C / 7,200 F
4. Where would you find the Gegenshein?
A: At the antisolar point
Gegenschein is a faintly bright spot in the night sky centered opposite the position of the sun. The backscatter of sunlight by interplanetary dust causes this optical phenomenon, also called counterglow. I used the same answer set as I did for the Kordelewski Cloud question a few months ago because the Gegenshein question occurred to me when I was writing that question
5. On average, a total solar eclipse occurs somewhere on Earth once every:
A: 18 months
When statistically averaged over the whole Earth surface and over long periods of time, a total eclipse occurs on average once per 18 months. Over short periods, there is some variation. Two total eclipses can occur slightly less than 12 months apart as is the case with the April 20, 2023 total eclipse in Australia and the April 8, 2024 total eclipse in Mexico, US, and Canada and up to 2 years apart as was the case between the August 2017 solar eclipse in the US and the, July 2019 total eclipse in Chile and Argentina
6. If you put a piece of paper at the focus of a refracting telescope without an eyepiece, the image you will see focused will be:-
A: Inverted and reversed left to right.
Any refracting lens will both reverse and invert the projected image. It's all the same thing, after all, a lens is radially symmetrical. When we view the projected image, most commonly on the viewfinder screen of a camera, the pentaprism both reverses and inverts the image back to correct orientation. When projected directly onto a film negative, sensor, or projection screen, the image remains reversed and inverted
7. The Guinness World Record for most people simultaneously stargazing through telescopes across multiple venues in one country stands at more than 40000 people. Which country holds that record? A: Australia
The record was first broken by the Australian National University in 2015. If you look up the site, it states, "The record for the most people stargazing at multiple venues is 7,960 participants and was organised by Mt. Stromlo Observatory, at the Australian National University (Australia) across 37 locations in Australia, on 21 August 2015." However the Guiness web site answer is now out of date. ANU broke it's own record 3 years later.
The Australian National University has smashed its own Guinness World Record for the most people stargazing at multiple venues. More than 40,000 people across Australia turned their eyes to the sky at more than 280 events across Australia on Wednesday night, with more than 3500 of those at the university's Acton campus. That meant the university, in partnership with the ABC, beat its own record of 7960 people across 37 locations, set in August 2015.
As part of the successful record attempt, stargazers simultaneously observed the moon through a telescope for 10 minutes.Remote locations included Birdsville, Uluru, Alice Springs and Broome.
ANU is the university that employed me for 36 years and so unsurprisingly, I participated in both events.
8
Which galaxy, excluding the Milky Way, has the largest apparent diameter as observed from Earth?
A: The Large Magellanic Cloud
Many answered Andromeda. Andromeda has a naked eye apparent diameter of perhaps 0.5 - 2 degrees depending upon the individual's eyesight. The Large Magellanic Cloud has a naked eye diameter of 3 - 5 degrees from a very dark sky depending upon acuity of the individuals eyesight Photographically, Andromeda is 4-5 degrees while the Large Magellanic Cloud is almost 10 degrees.
Some complained that this was southern hemisphere favouritism. Perhaps a southern bias but balanced by numerous questions in other recent quizzes about star and constellation names in north polar constellations of Ursa Minor and Major and Camelopardalis among others; none of which are visible from mid-southern latitudes.
9 Many amateur astronomers roll their eyes at the terms “supermoon” and “micromoon” used extensively by the media to describe full moons that coincide with monthly lunar apogee and perigee. Approximately how much bigger is an apogee (super) Moon than a perigee (micro) Moon?
A: 14%
A close perigee is around 358000 km and a distant apogee around 410000 km making a difference of about 14%. You can search for extremes and go a little higher but not as high as 18% .
10 What's the temperature of the Sun's corona? A: 1, 000, 000 Celsius / 1,800,000 Fahrenheit
This stumped many people and it is a somewhat surprising fact. The corona is heated by powerful concentrated magnetic energy guides that escape the sun through sunspots and heat the corona to temperatures much higher than the suns outer surface and more reflective of interior solar temperatures. Contrasting coronal to photosphere temperatures is a good point to raise if any of you are doing solar eclipse outreach.
Amateur astronomer since 1978...................Web site :http://joe-cali.com/ Scopes: ATM 18" Dob, Vixen VC200L, ATM 6"f7, Stellarvue 102ED, Saxon ED80, WO M70 ED, Orion 102 Maksutov, ST80. Mounts: Takahashi EM-200, iOptron iEQ45, Push dobsonian with Nexus DSC, three homemade EQ's. Eyepieces: TV Naglers 31, 17, 12, 7; Denkmeier D21 & D14; Pentax XW10, XW5, Unitron 40mm Kellner, Meade Or 25,12 Cameras : Pentax K1, K5, K01, K10D / VIDEO CAMS : TacosBD, Lihmsec. Cam/guider/controllers: Lacerta MGEN 3, SW Synguider, Simulation Curriculum SkyFi 3+Sky safari Memberships Astronomical Association of Queensland; RASNZ Occultations Section; Single Exposure Milky Way Facebook Group (Moderator) (12k members), The Sky Searchers (moderator)