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Oct
26
comment Why isn't sunset time in sync with solstice?
@StuartRobbins, thanks. The USNO times match with a few other sites including the NOAA which claims accuracy to within 1 minute. Though I don't think it explains why the two events would calculate out to such different dates. Actually, I've found an explanation similar to Omega Centauri's on the Royal Observatory's site. I'll add a link to it in the question.
Oct
26
comment Why isn't sunset time in sync with solstice?
Sorry but it's still not clear. The date of the solstice and the date of the sunset times are both on the same "clock" so to speak (using the same calendar). I understand the date of the solstice drifting from year to year but shouldn't the sunset time reversal happen at the same time as the solstice?
Aug
8
comment How are interplanetary trajectories found?
Looks interesting, I'll take a look at it. Thank you.
Aug
8
comment How are interplanetary trajectories found?
Thank you. Do you mean that since these "successive two-body problems" are not computationally excessive, that a brute force search is used to pick or find one particular trajectory? I'm sure there's more than one way to get to Mercury and I was curious what specific algorithm was used or could be used to optimize the search.
Jun
15
comment Significance of letters in Hertzsprung-Russell (H-R) diagram
Good explanation. Now the letter assignments make sense.
Jun
2
comment Can any telescope be used for solar observing?
Thanks, the link is helpful and excellent point about covering the full aperture.
Jun
2
comment Can any telescope be used for solar observing?
Thank you. Didn't know an H-alpha filter cost so much. With a Mylar filter, would a prominence not be visible or just not as clear?