Carl Witthoft's user avatar
Carl Witthoft's user avatar
Carl Witthoft's user avatar
Carl Witthoft
  • Member for 9 years, 10 months
  • Last seen more than 1 year ago
19 votes
Accepted

What is behind the Great Red Spot's longevity?

15 votes

Why aren't reflector telescopes built with an offset secondary mirror?

14 votes

Why is Ganymede's aurora only visible in ultraviolet while Earth's is bright green and red?

11 votes

How to know that the 21cm Hydrogen line is the actual emission and not any other redshifted line?

10 votes

Why are we building larger land-based telescopes instead of launching larger ones into space?

9 votes

Trouble Seeing Distant Planets Such as Jupiter and Uranus

6 votes

Has great eyesight been necessary for astronomers?

6 votes
Accepted

Instead of using flexible mirrors, could software be used for adaptive optics?

6 votes

Do comets contain any significant amounts of iridium?

5 votes

Relatable comparison of VY Canis Majoris to the Sun?

5 votes
Accepted

Is there any difference among exoplanets in composition due to host star?

5 votes

Why is there no concavity in the orbit of the moon around the Sun?

5 votes
Accepted

What exactly is the risk to any JWST instrumentation when looking at objects that are "too bright"?

5 votes

Are digital adaptive optics possible?

4 votes

How to listen to our world from 10,000 light years away?

4 votes

Does the magnetic field of earth restore?

4 votes

When would we detect a tiny meter size natural satellite in a geostationary orbits?

4 votes

Why don't we see purple stars

4 votes

Can a planet with no atmosphere be orbited at extremely low altitudes?

4 votes

What else can we learn from a Foucault pendulum? Have they ever been used to determine anything more than that the Earth rotates on its axis?

4 votes
Accepted

Can a material other than glass be used for making telescope mirrors?

4 votes
Accepted

Venus' magnitude during inferior conjunction

4 votes

What mechanisms limit the top speed of high altitude winds on Venus?

4 votes

If there was air between the Sun and Earth, how warm would we get?

4 votes

When the moon eclipses the sun what direction is darkened first: left or right?

4 votes

What is precipitable water vapor in millimeter-wave radioastronomy and how is it measured?

4 votes

Why are diffraction spikes left in JWST public images?

3 votes
Accepted

How to make motion of the Sun more apparent at seconds scale?

3 votes
Accepted

Difference between first (focal length (fl.) 500 mm, ocular (o.) 10 mm) and second telescope (fl. 1000 mm, o. 20 mm)? (both 50 x)

3 votes

At what point are orbital resonances no longer "ordered" but "chaotic?"

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