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 Yearling
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  • 0 posts edited
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  • 88 votes cast
May
30
comment Capturing Ceres
What do you mean by 'messing up the solar system'?
May
20
comment Where might a semi proficient amateur analyst participate in meaningful astronomical efforts
I would avoid cross posting. If you don't find a satisfactory answer here, then I'd recommend migrating the question
May
11
answered Cosmological deflation?
Apr
13
answered Open problems in astronomy that an amateur (with a PhD in some other field) would have a chance of solving?
Feb
3
awarded  Yearling
Jan
15
comment Why do we not send diggers to Mars if we think there's underground water?
This link gives an equation to calculate the extinction of atmospheric light given zenith angle. You can see from the chart further down the page titled average atmospheric extinction that once you pass an angle of ~70 degrees from the zenith that the extinction exceeds 100%. Mars has a tilt similar to earths (~ 25 degrees), so a rover at the pole wouldn't have to point its solar panels at the horizon to get significant sunlight, however it would be in the dark for half of the martian year, which is about twice as long as an Earth year.
Dec
29
comment How are rogue planets discovered?
It's a figure of speech referring to the continuing unlikely probability of a detection. The events being referred to are transits, described in the question and named in the first paragraph
Oct
8
awarded  Scholar
Oct
8
comment Dark Flow: statistical limits on existence
Great answer, never thought of it in terms of our local cosmological geography
Oct
8
accepted Dark Flow: statistical limits on existence
Jun
23
comment What is gravity really?
this isn't an answer (or even a theory), it's a high level idea with no mathematical proof or widely accepted references. You shouldn't post your 'beliefs' as answers
Jun
9
comment Average amount of annual daylight at any place on earth
@peter Smith yes. As it says in the answer the exact relationship of daylight hours with latitude depends on many astronomical and physical effects, such as the atmospheric composition to allow refraction. However the number of hours in both hemispheres will at least be between their respective poles and the equator.
Jun
7
awarded  Vox Populi
Jun
7
awarded  Suffrage
Jun
7
comment Active Galaxies
a quick wiki search gives you an answer to all your questions. Try and make your question more specific
Jun
7
awarded  Promoter
Jun
7
revised Dark Flow: statistical limits on existence
Added article link and tidied up
Jun
7
answered Recommendation for introductory cosmology text
Jun
7
answered Average amount of annual daylight at any place on earth
Jun
7
awarded  Citizen Patrol