User Carl Witthoft

19 votes

Accepted

What is behind the Great Red Spot's longevity?

answered Oct 9, 2020 at 13:08

15 votes

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

answered May 2, 2022 at 12:32

14 votes

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

answered Jan 14, 2020 at 19:14

11 votes

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

answered Aug 23, 2017 at 12:51

10 votes

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

answered Jun 12, 2018 at 15:18

9 votes

Trouble Seeing Distant Planets Such as Jupiter and Uranus

answered Jan 7, 2022 at 13:16

6 votes

Has great eyesight been necessary for astronomers?

answered Dec 30, 2019 at 22:38

6 votes

Accepted

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

answered Apr 3, 2017 at 13:27

6 votes

Do comets contain any significant amounts of iridium?

answered May 9, 2017 at 12:41

5 votes

Relatable comparison of VY Canis Majoris to the Sun?

answered Feb 7, 2017 at 14:15

5 votes

Accepted

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

answered May 14, 2018 at 14:57

5 votes

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

answered Mar 3, 2020 at 19:26

5 votes

Accepted

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

answered Jan 27, 2022 at 14:01

5 votes

Are digital adaptive optics possible?

answered Jul 3, 2019 at 15:29

4 votes

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

answered Aug 2, 2019 at 16:51

4 votes

Does the magnetic field of earth restore?

answered Aug 28, 2019 at 15:27

4 votes

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

answered Mar 12, 2019 at 18:30

4 votes

Why don't we see purple stars

answered Nov 21, 2018 at 15:04

4 votes

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

answered Jan 19, 2022 at 13:09

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?

answered Apr 25, 2022 at 11:17

4 votes

Accepted

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

answered Jan 20, 2020 at 19:05

4 votes

Accepted

Venus' magnitude during inferior conjunction

answered Oct 29, 2019 at 17:36

4 votes

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

answered Jan 11, 2017 at 13:27

4 votes

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

answered Jan 27, 2017 at 16:07

4 votes

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

answered Oct 6, 2016 at 12:59

4 votes

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

answered Oct 20, 2016 at 13:11

4 votes

Why are diffraction spikes left in JWST public images?

answered Jul 13, 2022 at 12:09

3 votes

Accepted

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

answered Jan 4, 2017 at 13:43

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)

answered Aug 1, 2019 at 18:18

3 votes

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

answered Jan 5, 2022 at 16:09

Stack Exchange Network

147 Answers

What is behind the Great Red Spot's longevity?

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

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

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

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

Trouble Seeing Distant Planets Such as Jupiter and Uranus

Has great eyesight been necessary for astronomers?

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

Do comets contain any significant amounts of iridium?

Relatable comparison of VY Canis Majoris to the Sun?

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

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

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

Are digital adaptive optics possible?

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

Does the magnetic field of earth restore?

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

Why don't we see purple stars

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

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?

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

Venus' magnitude during inferior conjunction

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

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

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

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

Why are diffraction spikes left in JWST public images?

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

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

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