Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Quiz about the Southern Cross
    From: Frank Reed
    Date: 2017 Sep 24, 09:10 -0700

    The original question was:
    "Are there areas on Earth where the Southern Cross can be seen with naked eyes and even during a short period in any night in the year ?"

    There's a wee, little ambiguity here. If I go to the South Pole, I can see the Southern Cross all night long --night just happens to last five months (after subtracting out a few weeks of twilight at each end). Point being, you didn't really mean "any night" but presumably "any 24-hour period", right? :)

    By the way, for those of us in the northern hemisphere, if you want to imagine something similar, Cassiopeia is about the same size and sits near 60°N declination, opposite the approximate 60°S for Crux. Both are about an hour of RA away from 0h right ascension, so they're not opposite each other (opposite dec; nearly the same RA, which is equivalent to SHA).

    Frank Reed

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site