Skip to content

sci.astro.amateur

Home arrow Newsgroups arrow sci.astro.amateur


sci.astro.amateur
Amateur astronomy equipment, techniques, info, etc.

  • ​ Relative to a bar connecting moon and earth, the moon doesn't spin.
    Relative to a bar connecting moon and earth, the moon doesn't spin;
    instead, the fast·moving bar slowly tumbles once a “month”.

  • Re: A bleak future for light pollution
    In a word, no - I don't think that's quite right. The color receptors
    in the eye (the three types of "cone" cells) are in no way themselves
    narrowband receptors that could be characterized as either "RGB" or
    "YGB". They are more accurately referred to as the "short," "medium,"
    and "long" receptors (re where their peak sensitivities show up in terms

  • Re: ? Looking through a portal affixed to the far side of the moon...
    It is the Will of God that the Moon should keep one face pointed to
    the Earth.
    The Will of God, see above.
    In that case, it would take about 29 1/2 days for the Moon to rotate
    once on its axis.
    Or, more precisely, 29 days, 12 hours, 44 minutes, and 3 seconds. This
    is about 708.734 hours.
    This means that the Moon would rotate at a speed of 9.34 miles per

  • Re: Dumb newbie question.
    Could it be that you were looking through
    dew on the objective?
    hmmmm.....no

  • Re: ? Looking through a portal affixed to the far side of the moon...
    And in all of that, you STILL couldn't be bothered to provide an answer to
    either of those very simple questions. Why not? The only reasonable
    assumption we can make, in the absence of such answers, is that your
    "theory" breaks down completely when you attempt to do so.
    Bob M.

  • Re: Bloody meteorite?
    Actually, physically dark basalt and other kinds of moon rock should
    offer signs of sodium, or at least the thermal transformation of
    whatever a meteorite containing sodium might still have to show after
    arriving on Earth. Of all the sources of meteorites, those from our
    moon/Selene should represent 99.9999%, whereas perhaps only at most a

  • Re: Viewing planets - basic question
    What Bud said. I'll add that Saturn is setting shortly after sunset,
    so if you wait for the twilight to darken a little bit you may see it
    near the horizon, "below" and to the right of Mars and Venus - but
    you're further north than me, and it's summer, so your sunset may be
    too late to see it. And Jupiter should be coming up around 8 or so PM,

  • Re: ? Looking through a portal affixed to the far side of the moon...
    clip
    Did you look at your own recommended youtube video? As well as the earth
    rotating, the video clearly also shows the moon rotating on its axis.
    Want to pick another video?

  • Re: Dumb newbie question.
    "j" <7> wrote
    OK, good. That's a good attitude. :-) Enjoy it.

  • Re: Viewing planets - basic question
    On Thu, 2 Sep 2010 09:18:15 -0700 (PDT), Richard Fangnail
    Look west shortly after sunset. Venus is the brightest "star" close
    to the western horizon. Mars is just to the right. Look east later
    in the evening. Jupiter is the brightest "star" in the east. The Sky
    and Telescope web site has an interactive star chart that will show

  • Re: Bloody meteorite?
    On Sep 2, 9:44 pm, Brenda Guff postulated:
    And I'd take a very large pinch of lunar salt with that remote
    possibility. ;-)
    [link]

  • Re: ? Looking through a portal affixed to the far side of the moon...
    What can be said of people who believe that the Earth rotates 366 1/4
    times over an orbital circuit of 365 1/4 days !.
    There are 365 rotations to the Sun every year plus the fractional 5
    hours 49 minute addition corresponding to a complete orbital
    circumference and orbital period,as the fractional difference

  • Re: Bloody meteorite?
    On Sep 2, 1:50 am, Martin Nicholson
    I'm convinced that a number/majority of his meteorites are those of a
    terrestrial origin.
    However, his mostly terrestrial meteorite analogy and his imaging
    technology is downright impressive.
    There could possibly be a Mars meteorite in his collection, although
    more likely moon rocks and/or those from when Earth was impacted by an

  • Re: A bleak future for light pollution
    YES :-)
    The filters you refer to above are narrowband emission line isolating
    filters. That isn't quite the same as a broadband light pollution filter
    or as is possible uniquely with low pressure sodium a notch reject
    filter. Serendipity allows a relatively cheap anti-sodium notch filter
    to be made with neodymium doped glass - glass blowers use it to see into

  • Re: A bleak future for light pollution
    In a few more years (possibly a decade) China will have added a
    terawatt of efficient street and outdoor area lighting. Commercial
    aviation currently contributes several gigawatts that does nothing
    except illuminate the atmosphere.
    ~ BG

  • Re: ? Looking through a portal affixed to the far side of the moon...
    You're wasting your breath. I think it's already been demonstrated
    that he's not even going to acknowledge any such questions, even
    though there should be absolutely no problem answering them
    IF his theory were truly valid and fully developed. I'm still waiting
    for answers to a pair of equally simple questions, namely

  • Re: Viewing planets - basic question
    On Sep 2, 9:18 am, Richard Fangnail
    wrote:
    A shortcut icon on my desktop takes me to StarCalc
    [link]
    Very handy for a quick "What's up?"

  • Re: Viewing planets - basic question
    Richard Fangnail wrote in news:e33fcbfb-dcc8-
    40e3-8489-4969a446f...@i13g200 0yqd.googlegroups.com:
    free planetarium I use as much as Starry Nights Pro...
    [link]

  • Re: A bleak future for light pollution
    Almost everybody does.
    <[link]>
    Or were you being smarmy?

  • Viewing planets - basic question
    I live in Southern California and I need a basic idea of where and
    when to view Mars, Jupiter and Venus with the naked eye. I doesn't
    have to be super exact, just the basics of what part of the sky would
    have these planets and about what time and parts of the year. I
    googled a lot of maps but only got star maps.

  • Re: ? Looking through a portal affixed to the far side of the moon...
    The Roman Catholic Church still exists in the present day as an
    institution. If it fails to see the manifest danger to human reason in
    the false ideas which you find to be clouding astronomy, yes, it is
    hard to see what could be done.
    John Savard

  • Re: A bleak future for light pollution
    Davoud:
    Martin Brown:
    Heloo-oo! Are you preaching to me, a member of the choir? I'm not the
    one who installed the fixtures--I'm the one who removed all outdoor
    lighting from his home. And there is no use trying to preach to those
    who like those cutesy fixtures. "But they look like antiques." "They do

  • Re: ? Looking through a portal affixed to the far side of the moon...
    There is no need to convince anyone that the Earth's 365 day 5 hour 49
    minute rotational cycle is coincident with the Earth's orbital period
    around the Earth as the leap correction which adds a day represents
    the quarter day shortfall each year as the steady progression of days
    in a calendar year is 365 rotational cycles to the Sun with the leap

  • Re: Balancing a GEM that's not level
    What weight arm?
    Did you rotate the OTA between balance tests? Radial balance of a
    *rotatable* OTA is highly desirable. Even if it only means that you
    occasionally rotate the tube in its rings accidentally on set-up. Or
    do so routinely to make the eyepiece position more comfortable/
    accessible. A small weight (or weights) attached to the tube on the

  • Re: A bleak future for light pollution
    It's a shame we can't sell the idea of dumb lighting to the popular
    media.
    How about?
    The only advantage of dumb lighting is being able to read porno mags
    while driving.
    Or, the only advantage of dumb lighting is being able to easily
    identify kerb crawlers.
    Or, the only advantage of dumb lighting is being able to recognise

  • Re: A bleak future for light pollution
    Do you happen to sell such filters? :-P

  • Re: ? Looking through a portal affixed to the far side of the moon...
    During 365 1/4 days, in addition to 365 1/4 days passing, the Earth
    orbits the Sun once. And the stars return 366 1/4 times, reflecting
    the fact that the direction from the Sun to the Earth, and hence the
    direction from the Earth to the Sun, has gone through 360 degrees once
    in the year.
    You can say it's ridiculous. But the stars return 366 1/4 times; they

  • Re: Bloody meteorite?
    Methinks thou doth anoint the holey fizzle with too much import. He's
    a raving, bløødthirsty lunatic and a troll. The triality is hardly
    worthy of note. Bring proof of vampirism and we might build a half-
    decent, celeb culture around him. Then auction tickets on eBay to win
    the chance to ceremoniously hammer a large wooden stake through his

  • Re: Dumb newbie question.
    How dewy was it that night? Could it be that you were looking through
    dew on the objective?

  • Re: Bloody meteorite?
    He's also of the opinion that there is a certain type of
    chinaware which is made by angels and not by humans.
    [link]

  • Re: So how did it go?
    Yes. I bought my secondhand LX200 10" from a one time UK regular on this
    group a long while ago and met denizens of this and more often
    uk.sci.astronomy at events like AstroFest as well as a few locally.
    Being tall helps. I am easy to spot in a crowd!
    Regards,
    Martin Brown

  • Re: Bloody meteorite?
    All you need to know about this guy!
    [link]

  • Re: A bleak future for light pollution
    You can have old fashioned looking fixtures that are still full cutoff.
    There is no-one to see the light that goes skywards so it may as well be
    directed downwards. Some modern designs use Fresnel optics in the glass
    panes - which works OK until sufficient dead moths accumulate in them.
    Rural China and Japan are places where I expect respect for nature and a

  • nike shoe ( http://www.brandtrade66.com/
    Shox Shoes (http://
    [link])
    shoes shox shoes (http://
    [link])
    nike shox shoe (http://
    [link])
    nike shox shoes ( [link]

  • Re: A bleak future for light pollution
    Actually I could see the chinese installing smart lighting fixtures
    if that is the first time they install outside lighting in a location.
    I wouldn't expect the cost of smart lighting to be much higher than
    that of dumb lighting if you start from zero. It's only when there is
    "perfectly good" lighting fixtures already in place that it becomes

  • Re: ? Looking through a portal affixed to the far side of the moon...
    The Earth's equatorial circumference is 40,075 km therefore 15 degrees
    of geographical separation represents 1669 km and also 1 hour time
    difference if you ever look at a globe and that is a very simple
    correlation,the following table of values representing 1 degree and 4
    minutes of rotation represent a round and rotating Earth -

  • Re: A bleak future for light pollution
    Unfortunately this could easily be true at least until light levels at
    night are increased to be the same as daytime. This is most likely to
    happen in major city centres and shopping malls.
    That only really works if you treat light as "Fire and forget". The
    point remains that downward full cutof lighting doesn't directly light

  • Re: ? Looking through a portal affixed to the far side of the moon...
    Ah, but night lasts slightly longer than day because it has a greater
    scallop. Doubtless Stockton will confirm this important fact. Or
    perhaps it won't if night travels faster than day...
    In short,the Earth turns slowly and unevenly to the central
    [link]

  • Re: ? Looking through a portal affixed to the far side of the moon...
    My dearest oriel36,
    The Earth has an orbital daylight/darkness cycle which combines with
    daily rotation to cause both the seasons and variations in the natural
    noon cycle.In short,the Earth turns slowly and unevenly to the central
    Sun where the seasonal cycle is coincident with its orbital motion and

  • Re: Sky & Telescope's Weekly Bulletin - August 13, 2010
    <4c799c12$0$14852$9a6e1...@unl imited.newshosting.co
    Good grief, Payne, a more direct request to be plonked is unlikely to
    go unheeded. I plonked the immature bigot Stockton some time ago
    for his overbearing Napoleonic complex, I suggest you do the same.

  • Re: Bloody meteorite?
    You're the delusional and powerless Wrecked Fossil.

  • Re: Bloody meteorite?
    You should quit abusing chemicals. Stat.

  • Re: Sky & Telescope's Weekly Bulletin - August 13, 2010
    You really *are* a "stick in the mud", aren't you.
    Since we were talking about three bodies, the Earth, the Moon
    and the Sun, and as pertains to "orbits", only two objects, the
    Moon and the Earth, i thought it rather obvious that the "larger
    arcs" of the Moon were compared to the smaller arcs of the

  • Re: A bleak future for light pollution
    pete:
    I would have rephrased the subject based on my own somewhat cynical
    view: "A bright future for light pollution, a bleak future for
    astronomy."
    One respondent noted improved street lighting. I'm happy for him. Anne
    Arundel County, MD, has decided that "old-fashioned" fixtures that
    throw all of their light and glare horizontally and upward are really

  • Re: Bloody meteorite?
    Sorry, I was wrong on this matter. The image seen by the neurologist
    was not mine at all.

  • Re: Bloody meteorite?
    Sorry, I should not have said "long ago". I mentioned that in a
    newsgroup not long ago--maybe within one month.

  • Unknown Cygnus reflection nebula discovered and confirmed by 2 San Jose amateur astronomers
    Unknown Cygnus reflection nebula discovered and confirmed by 2 San
    Jose amateur astronomers - Sept. 1, 2010
    A small reflection nebula coincident with the star 4 Cygni, now well
    placed for nightly observing, has been confirmed by professional
    astronomers. It was discovered visually with a 10 inch scope by one

  • Re: Dumb newbie question.
    x-no-archive: yes
    Good advice.. I tried what you said. The objective lense is the cause.....
    If I get Jupiter in the very center it's OK
    I'm not complaining, the scope is doing what it was designed for...
    The scope is a good value for the price..... I got a Vixen eyepiece and a
    tripod on sale... not a bad setup :~)

  • Re: Bloody meteorite?
    I hope the only bloody meteorite is the one that takes Ed Conrad's head off.
    --- news://freenews.netfront.net/ - complaints: n...@netfront.net ---

  • Re: Dumb newbie question.
    Anything you post to usenet can be seen by anyone and they can keep it
    for as long as they like. You may think something is sensitive but
    once you post it you have absolutely no control over it anymore.