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DJohnM's user avatar
DJohnM's user avatar
DJohnM
  • Member for 10 years
  • Last seen more than a week ago
  • Toronto, Canada
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About

Retired community college professor

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28
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20
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18
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7
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11
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7
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13
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8
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Top posts
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All Questions Answers
Score Newest
answer
18
Could mirrors be replaced with CCDs?
Mar 30, 2016
answer
11
What is the likelihood of the existence of unknown elements in the Solar System?
Jun 28, 2014
answer
8
What was the largest telescope ever fitted with an eyepiece
Nov 28, 2015
answer
7
In zero gravity - I'm floating inside a torus as they spin it up, do I float do the "ground"?
Jan 31, 2017
answer
7
What would the effects be on Earth if Jupiter was turned into a star?
Aug 6, 2014
answer
6
Does Doppler shift affect apparent pulsar frequency?
Apr 29, 2014
answer
4
How would I measure that I'm at a pole?
Nov 20, 2013
answer
4
Why do we only have one major meteor shower from 3200 Phaethon?
Dec 14, 2020
answer
3
Why does e.g. Hubble's secondary mirror not block part of the picture?
Feb 24, 2014
answer
2
Is there an oxide layer on aluminum reflectors for telescopes?
Feb 7, 2014
Top network posts
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146
How do grandfather clocks keep going?
114
What would prevent me from taking advantage of scammers?
51
Why does this movie say a witness can't present a jury with testimony which would assist in making a determination of guilt or innocence?
51
If you have a home mortgage, why do you still have to pay all of the property tax?
51
Conservation of momentum when rain pours into a wagon

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