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Oct
16
answered How powerful a telescope would allow me to view the astronauts aboard ISS do a space-walk?
Oct
16
comment How exactly is our universe mapped?
Are the two black slices in the diagram due to the milky way blocking our view?
Oct
15
awarded  Commentator
Oct
15
comment Is the light we see from stars extremely old?
4000 lightyears would mostly be still in our galaxy, which is roughly 100.000 lightyears across, and 3000-6000 lightyears thick. Most galaxies are at least millions of lightyears away.
Oct
11
revised How can I create tracks of the planet's orbits on my computer?
Make question more targeted
Oct
11
comment How can I create tracks of the planet's orbits on my computer?
I edited the question a bit, and would also be able to provide at least one answer.
Oct
11
suggested approved edit on How can I create tracks of the planet's orbits on my computer?
Oct
11
comment Jupiter FM - What are practical and inexpensive ways for the amateur detection of signals from Jupiter, especially of the transit of her moons?
I would never have guessed that it might be possible with such an easy setup. Very good answer!
Oct
10
comment How can I create tracks of the planet's orbits on my computer?
What do you mean by tracking? Do you want to plot the orbits of planets? Do you want to track them in real life, using your PC and s motorized telescope? Please clarify.
Oct
10
revised Jupiter FM - What are practical and inexpensive ways for the amateur detection of signals from Jupiter, especially of the transit of her moons?
added 494 characters in body
Oct
10
answered Jupiter FM - What are practical and inexpensive ways for the amateur detection of signals from Jupiter, especially of the transit of her moons?
Oct
10
comment Should I focus more on Aperture or Focal Length for a telescope?
+1 on the Moon tip. I once accidentally pointed my scope at part of the moon and had a shadowy streak on my vision for some days. Good neutrally grey polarization filters that can be tuned from 50%-95% absorption can be had for around 50 EUR (for 1.25" eyepieces).
Oct
9
answered Why did the Comet Shoemaker-Levy-9 fragments cause such large explosions on Jupiter?
Oct
9
comment How many planets are there in this solar system?
Very good summary on the criterion. This was new to me.
Oct
9
answered Are Barlow Lenses Good For Deep Sky Observing?
Oct
9
answered Where does the radiation in space come from and can we observe it?
Oct
9
answered Should I focus more on Aperture or Focal Length for a telescope?
Oct
9
answered Affordable night sky photography
Oct
9
answered How many planetary systems exist in our galaxy?
Oct
4
answered Moon orbits crossing each other