Page 1 of 2 12 LastLast
Results 1 to 10 of 20
Like Tree13Likes

Thread: Geocentric View

  1. #1
    DoctorT's Avatar
    DoctorT is offline White Dwarf
    Points: 50, Level: 1
    Level completed: 50%, Points required for next Level: 50
    Overall activity: 69.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Oct 2019
    Location
    New York City
    Posts
    7
    Points
    50
    Level
    1
    Thanks
    1
    Thanked 0x 0 Posts

    Question Geocentric View



    Hi!

    I am a newbie! In the geocentric (i.e., Earth-centered) view of the Universe, at a given time (say January 1) and a given place (say a rural location in Upstate New York), if one is looking up at the night sky, does one sees only ONE constellation (of the twelve constellations in the Zodiac)? And, would one see the same constellation the following year?

    Thank you!

    Dr. T

  2. #2
    goldstar's Avatar
    goldstar is online now SUPER GIANT
    Points: 8,643, Level: 64
    Level completed: 65%, Points required for next Level: 107
    Overall activity: 11.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2016
    Location
    plattsburgh
    Posts
    1,070
    Points
    8,643
    Level
    64
    Thanks
    2
    Thanked 294x 238 Posts

    Default Re: Geocentric View

    At the same time of night, say midnight on Jan 1, the constellations will look the same from year to year on that date.
    The twelve zodiac constellations (astronomically) vary in size but on average only 6 will be visible at any time.
    There is a free sky simulator called Stellarium available for download. This shows the sky and constellations for any location at any time past present or future, within limits of course.
    Gabby76 and DoctorT like this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    CR 6 150 mm f8 refractor . AVX mount. 80mm guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    with Nexguide. Canon EOS rebel 3 Ti
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    . Canon Rebel XS DIY modified. I- Optron skytracker. Sky Watcher 8 inch collapsible Dob. 30 mm, 25 mm ,20 mm, 15 mm, 10 mm ,8.8 mm EPS plus plus plus. Cometron 12 x 70 binos plus a couple of 6X42 birders. Sky Watcher PRO ED 80 mm. UHC/LPR, OIII, UV/IR cut filters . Flip mirror. 5 mW green Laser pointer. Telrad donated to Rick18704-Lots of hope. Lousy skies.

  3. #3
    DoctorT's Avatar
    DoctorT is offline White Dwarf
    Points: 50, Level: 1
    Level completed: 50%, Points required for next Level: 50
    Overall activity: 69.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Oct 2019
    Location
    New York City
    Posts
    7
    Points
    50
    Level
    1
    Thanks
    1
    Thanked 0x 0 Posts

    Default Re: Geocentric View

    Dear GoldStar,

    Thank you for your reply!

    Out of curiosity, if at a given day, time, and place one sees six of the twelve, how did astrologers pick the Capricornus constellation as the constellation associated with January 1? Why not one of the other five?

    Dr. T

  4. #4
    KathyNS's Avatar
    KathyNS is offline Super Moderator
    Points: 173,046, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 54.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts AchievementGot three Friends
    Awards:
    Reply Award
    Join Date
    Nov 2010
    Location
    Nova Scotia
    Posts
    25,172
    Points
    173,046
    Level
    100
    Thanks
    6,660
    Thanked 14,985x 9,542 Posts
    Blog Entries
    3

    Default Re: Geocentric View

    Quote Originally Posted by DoctorT View Post
    Dear GoldStar,

    Thank you for your reply!

    Out of curiosity, if at a given day, time, and place one sees six of the twelve, how did astrologers pick the Capricornus constellation as the constellation associated with January 1? Why not one of the other five?

    Dr. T
    No one knows how atrologers do what they do, not even them! Note that astrology is very different from astronomy, which is the focus of this forum. We don't do astrology here.

    Still, the mechanics are simple enough. Back when the astrological zodiac was first set up, the Sun was in Capricornus on January 1st. Precession of the equinoxes has moved the Sun to Sagitarius now on that date, but the astrological charts do not get updated. All the astrological "signs" are Sun-signs, meaning that they reflect the position of the Sun back when the charts were first invented.
    DoctorT likes this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    DSO AP:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (pier);
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  5. The Following User Says Thank You to KathyNS For This Useful Post:

    DoctorT (10-12-2019)

  6. #5
    goldstar's Avatar
    goldstar is online now SUPER GIANT
    Points: 8,643, Level: 64
    Level completed: 65%, Points required for next Level: 107
    Overall activity: 11.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2016
    Location
    plattsburgh
    Posts
    1,070
    Points
    8,643
    Level
    64
    Thanks
    2
    Thanked 294x 238 Posts

    Default Re: Geocentric View

    Capricorn on Jan 1 is not visible to us as this is the constellation where the Sun is located at that time and is visible in the night sky only in the summer months.
    Sure, Capricorn is up there in the sky but behind the Sun but lost in the light of the daytime sky.
    If there were to be a total Solar eclipse at that time then we would indeed be able to see the Capricorn with the eclipsed Sun sitting in it.
    Astrologers consider the birth sign as to be which constellation the Sun is in at the time of birth.
    Although I hold no significance to it, my sign is Leo, born in November when the Sun was in that sign.
    Leo is seen best 6 months later when it is in the spring night skies.
    AsteroidsRock and DoctorT like this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    CR 6 150 mm f8 refractor . AVX mount. 80mm guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    with Nexguide. Canon EOS rebel 3 Ti
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    . Canon Rebel XS DIY modified. I- Optron skytracker. Sky Watcher 8 inch collapsible Dob. 30 mm, 25 mm ,20 mm, 15 mm, 10 mm ,8.8 mm EPS plus plus plus. Cometron 12 x 70 binos plus a couple of 6X42 birders. Sky Watcher PRO ED 80 mm. UHC/LPR, OIII, UV/IR cut filters . Flip mirror. 5 mW green Laser pointer. Telrad donated to Rick18704-Lots of hope. Lousy skies.

  7. #6
    Voyageur's Avatar
    Voyageur is online now SUPER GIANT
    Points: 8,545, Level: 64
    Level completed: 32%, Points required for next Level: 205
    Overall activity: 79.0%
    Achievements:
    2 Posts AchievementGot three Friends20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!
    Join Date
    Jul 2016
    Location
    Leelanau County, Michigan (April-Oct); Barra de Navidad, MX (Nov-March)
    Posts
    1,378
    Points
    8,545
    Level
    64
    Thanks
    358
    Thanked 526x 342 Posts

    Default Re: Geocentric View

    Quote Originally Posted by DoctorT View Post
    Dear GoldStar,

    Thank you for your reply!

    Out of curiosity, if at a given day, time, and place one sees six of the twelve, how did astrologers pick the Capricornus constellation as the constellation associated with January 1? Why not one of the other five?

    Dr. T
    Astrology is an ancient pseudoscience with origins thought to be in Babylonia, perhaps more than 4,000 years ago, when people began looking for meaning in the physical world that could somehow be related to human reality, i.e., that human destiny was mystically controlled by celestial events. It's not my belief, and I doubt you will find that any of the regular participants here will hold that belief, either.

    So, since this is an astronomy forum, it is perhaps not the best place to come looking for more information about the history of astrology.

    I'm sure if you googled "history of astrology" you would get a lot more information than you've received here. There are surely many more astrology websites than amateur astronomy ones.

    If you are, however, genuinely interested in the science of astronomy, there is a lot of great information on this site.
    DoctorT likes this.
    Mary


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    Vixen VMC200L, D=200mm, F=1950, f/9.75; Televue 2" Everbright diagonal. Coronado PST; AstroTech EDT 80mm, F=480, f/6. Mounts: Vixen SXW/Starbook (original); Stellarvue M2C alt-az. Eyepieces: Televue: 55mm Plossl, 22mm Panoptic, 17.3mm Delos, 13mm Nagler, c. 1980, 11mm Plossl, 7mm Nagler; Meade 15mm Super Plossl; VERNONSCOPE 2.4X
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    . Binoculars: Leica 8x32 Trinovids, circa 1997;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Megaview 20x80, Orion Paragon Plus mount.

  8. #7
    DoctorT's Avatar
    DoctorT is offline White Dwarf
    Points: 50, Level: 1
    Level completed: 50%, Points required for next Level: 50
    Overall activity: 69.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Oct 2019
    Location
    New York City
    Posts
    7
    Points
    50
    Level
    1
    Thanks
    1
    Thanked 0x 0 Posts

    Default Re: Geocentric View

    Dear Goldstar,

    Thank you for your reply.

    I realize this is an astronomers. not astrologers forum. I am researching ancient astrology when there was no difference between them. Since astronomy is a science and astrology is a belief system, I have to rely on astronomers to better understand the mindset of ancient astrologers.

    Re your reply, do you mean that the Sun and the constellation of Capricornus were lined up? That is, Earth >>> Sun >>> Capricornus.

    Dr. T

  9. #8
    KathyNS's Avatar
    KathyNS is offline Super Moderator
    Points: 173,046, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 54.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts AchievementGot three Friends
    Awards:
    Reply Award
    Join Date
    Nov 2010
    Location
    Nova Scotia
    Posts
    25,172
    Points
    173,046
    Level
    100
    Thanks
    6,660
    Thanked 14,985x 9,542 Posts
    Blog Entries
    3

    Default Re: Geocentric View

    Quote Originally Posted by DoctorT View Post
    Re your reply, do you mean that the Sun and the constellation of Capricornus were lined up? That is, Earth >>> Sun >>> Capricornus.
    Yes. When we say that an object is "in" a constellation, it means that the object is between us and the constellation, so the constellation forms the object's background.
    DoctorT likes this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    DSO AP:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (pier);
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  10. #9
    AsteroidsRock's Avatar
    AsteroidsRock is offline SUPER GIANT
    Points: 7,275, Level: 59
    Level completed: 63%, Points required for next Level: 75
    Overall activity: 8.0%
    Achievements:
    2 Posts Achievement365 Days+ Registered Achievement!20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!
    Join Date
    Oct 2015
    Location
    Bay Area
    Posts
    683
    Points
    7,275
    Level
    59
    Thanks
    247
    Thanked 307x 205 Posts

    Default Re: Geocentric View

    Quote Originally Posted by DoctorT View Post
    Re your reply, do you mean that the Sun and the constellation of Capricornus were lined up? That is, Earth >>> Sun >>> Capricornus.

    Dr. T
    This might help

    https://earthsky.org/astronomy-essen...-is-the-zodiac
    AR
    TScopes: Zhumell Z8, Bushnell 1300x100 Mak, Meade Adventure 80mm
    Mount: ES EQ Nano Mount, Arduino,Stepper RA drive, 50mm guidescope, AR0130 based guidecam
    Eyepieces: ES82 18,11,6.7mm, Zhumell 30,9mm FJ Ortho 9mm, assorted plossls, Meade 2x S-FBarlow, DGM NPB filter
    Binos: Celestron Skymaster 15x70 (Albott tripod/monopod), Nikon Naturalist 7x35

  11. #10
    DoctorT's Avatar
    DoctorT is offline White Dwarf
    Points: 50, Level: 1
    Level completed: 50%, Points required for next Level: 50
    Overall activity: 69.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Oct 2019
    Location
    New York City
    Posts
    7
    Points
    50
    Level
    1
    Thanks
    1
    Thanked 0x 0 Posts

    Default Re: Geocentric View

    Quote Originally Posted by KathyNS View Post
    No one knows how atrologers do what they do, not even them! Note that astrology is very different from astronomy, which is the focus of this forum. We don't do astrology here.

    Still, the mechanics are simple enough. Back when the astrological zodiac was first set up, the Sun was in Capricornus on January 1st. Precession of the equinoxes has moved the Sun to Sagitarius now on that date, but the astrological charts do not get updated. All the astrological "signs" are Sun-signs, meaning that they reflect the position of the Sun back when the charts were first invented.
    Dear KathyNS,

    Thank you for your reply!

    I realize that this is an astronomers'. not an astrologers', forum. However, most astrologers' forums focus on the influence of the planets on people and events. Since astrology is not a science, most astrologers do not have a clear, scientific explanation about how it works.

    Dr. T

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Using Stellarium to Simulate your View or Imager's View.
    By GaryCurran in forum Astronomy Beginners Forum
    Replies: 6
    Last Post: 02-01-2015, 03:29 AM
  2. Issue when converting JPL euclidian data to geocentric data
    By JVerstry in forum Astrophysics Forum
    Replies: 0
    Last Post: 07-21-2011, 11:23 AM
  3. ? heliocentric vs geocentric models ?
    By marks542004@yahoo.com in forum Amateur Astronomy Forum
    Replies: 94
    Last Post: 07-23-2008, 10:08 AM
  4. Geodetic or geocentric?
    By Cristiano in forum UK Astronomy Forum
    Replies: 1
    Last Post: 10-13-2005, 08:27 AM
  5. Geodetic or geocentric?
    By Cristiano in forum General Astronomy Forum
    Replies: 1
    Last Post: 10-12-2005, 10:06 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin« Version 4.2.0
Powered by vBulletin«
All times are GMT. The time now is 01:53 PM.