1,488 reputation
216
bio website root42.blogspot.com
location Earth
age 35
visits member for 1 year, 1 month
seen Oct 10 at 19:28

Coder, software architect, interest in computer science in general. Did research on computer graphics, ray tracing, radio wave and antenna simulation. Like to learn new programming languages. Currently doing Python and Emacs Lisp for fun. C++ for profit. Would like to learn more Clojure.


Aug
10
comment What is CMB radiation doing to the universe?
@user52076 If you are satisfied, please think about accepting the given answer.
Aug
9
comment How do telescopes “zoom” and change angle of view?
A refracting telescope would need many lenses for good zooming capability. Amateur scopes usually only have two or three lenses to reduce chromatic aberration. With amateur telescopes you can buy zooming eyepieces, which let you vary the FOV.
Mar
19
comment What is the temperature of outerspace?
@RyanMcGaha From the linked WP article: The baseline temperature, as set by the background radiation (from the theorized Big Bang), is 2.7 kelvin (K).
Feb
28
comment What can be seen with a 4.5" telescope
Large Messier objects like open clusters will show lots of stars. The Orion nebula will seem like a grey, cloudy patch. The core of the Andromeda galaxy will also be a cloudy patch. The large globular clusters like M13 will appear as lots of stars in a sphere.
Dec
20
comment How does the Milky Way look like above 66° North and below 66° South?
Thanks. If you think this answers your question, you may accept the answer.
Dec
19
comment How does the Milky Way look like above 66° North and below 66° South?
I've added a 24 hour animation to my answer, which shows the rotation.
Dec
19
comment What can be seen with a 4.5" telescope
Then you can definitely take on the planets, since you will have about a meter of focal length. You should Start out with a 10mm eyepiece, and later buy a Barlow lens, or better: buy a good 8mm or 5mm eyepiece. The last may be expensive or not very suitable anymore for your telescope, though.
Dec
19
comment How does the Milky Way look like above 66° North and below 66° South?
The map shows the sky above you. Easiest to understand if you lie down on the ground, head facing north and then holding the map in front of you. The zenith is in the middle of the map, north is where polaris is (i.e. top part of the map). East and west are reversed, because its an overhead map. So west is right, and east is left.
Dec
16
comment What are some night sky objects I could see with my Celestron UpClose 20x50 Porro Binocular?
Update: It seems there is a similar book being done by the same publisher: oculum.de/sites/deepskyatlas/site/dsa.asp -- May be worth checking out.
Dec
16
comment What are some night sky objects I could see with my Celestron UpClose 20x50 Porro Binocular?
There used to be a very good reference guide for this: Deep Sky Travel Atlas. I have it, however I think it is out of print and it was also in German. It's mostly maps and tables, so the language is not so important... It marks objects as being suitable for binoculars or small telescopes.
Dec
10
comment Coordinate transformations between reference frames in spherical astronomy
I am rather sure now. Please correct me if I'm wrong -- edited the answer accordingly.
Dec
10
comment Coordinate transformations between reference frames in spherical astronomy
Reading this, I am not quite sure if maybe the $r'$ needs to be multiplied instead, since it represents a scaling...
Nov
22
comment Will Neptune be visible with the naked eye if I am standing on its satellite
If my estimates are roughly correct, you will see it in color. $10^2cd/m^2$ are, as I said, in the range of photopic (color) vision of humans.
Nov
21
comment What is the distance that the Moon travels during one orbit around the Earth?
@leonardvertighel ok, so orbits are linear and/or additive? I was wondering that. I thought it might be a bit more complicated, since orbits are a function of time, and the orbits are not simple, linear functions.
Nov
20
comment What is the distance that the Moon travels during one orbit around the Earth?
Good point! Though I still don't quite know how to calculate it. :)
Nov
20
comment What is the distance that the Moon travels during one orbit around the Earth?
Yes, I thought of a similar thing. Wikipedia states that the orbit of the Moon around the Sun is convex however, since the Sun's influence is much greater than the Earth's influence. So I don't know if a helix would be a good approximation... Maybe for the Sun/Jupiter/Ganymede system...?
Nov
20
comment What is the distance that the Moon travels during one orbit around the Earth?
What if you want to know the motion of the moon around the sun? How would you compute that?
Nov
20
comment What is the distance that the Moon travels during one orbit around the Earth?
Amazing, how close this answer is to the other one, although you did quite a few approximations!
Nov
19
comment How are the newly discovered Janus/Epimetheus rings different from the other rings of Saturn?
What's the structure like?
Nov
19
comment How does a Bahtinov mask work?
If you could add a bit from the linked articles, I would accept your answer: "Always quote the most relevant part of an important link, in case the target site is unreachable or goes permanently offline."