--- Alan Gornik <[EMAIL PROTECTED]> wrote: > > > > 2)But then when I click Polar Projection & Show all Sky, Polaris > > > is no longer at the top? Why not? What causes the chart to move? > > > > Whether you use polar or zenithal projection, when > > you click Show all Sky, the center of the previous chart will be > below > > center. > > > Regarding this, I am still not sure what is happening. Here are my > steps: 1) Set to Show all sky and put South at the bottom (so all > looks ok with Ursa Minor in the middlke of the top half of the chart > sincee I am in Chicago lat about 42; 2)if click Polar/Zenith toggle > button back and forth, both look OK;
> 3)but if I click Polar then go > dorectly to Show All Sky, Ursa Minor appears to the right and my > bottom is at 280 deg. Why does it move like this? Just before this, did the chart have a narrower view? And where was it centered? As I said before, when you click Show all Sky, whatever was centered in the previous chart will be below center (ie, in the "down" direction) in the new all-sky chart. This is realistic, because it shows what you would see if (in real-life viewing) you were looking at the sky shown in the previous chart, and then raised you head to look straight up to see the whole sky. So if the previous chart isn't centered on an object in the south, then when you go to the all-sky chart, it won't have north up. > In order to get > back to what I want, I have to hit the South horizon button again. > Is my sequence of steps just unrelated and I should focus on getting > either the projections OR the show all sky to look like what I want > and not worry about what happens when I switch back and forth? > > New question: I know from the local newspaper that Saturn will be in > best view this week. Is there anything in CDC that would alert me to > this? > If not, that means I still have to rely on outside sources for > these alerts, correct? There are very many events in all sorts of categories that one person or another might consider worthy of an "alert". Deciding which are the most interesting to an average viewer is one of those things that humans still do better than computers. S&T has a weekly email service for interesting sky events. See <http://skyandtelescope.com/observing/ataglance/>. You can sign up at <http://skyandtelescope.com/shopatsky/emailsubscribe.asp> to have these sent to you weekly. See also <http://skyandtelescope.com/observing/highlights/>. And somewhere on their website (I forget where) you can also sign up to get near real-time alerts for Northern Lights and other unusual sporadic events (Northern Lights are somewhat predictable, based on monitoring solar activity, up to a day or two in advance). Another useful resource is the Abrams Sky Calendar at <http://www.pa.msu.edu/abrams/SkyCalendar/>. You have to pay $11/year to have this graphic guide snail-mailed to you monthly, but a similar text version is available online free at <http://www.pa.msu.edu/abrams/SkyWatchersDiary/Diary.html>. -John __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------ Yahoo! Groups Sponsor --------------------~--> Has someone you know been affected by illness or disease? Network for Good is THE place to support health awareness efforts! http://us.click.yahoo.com/RzSHvD/UOnJAA/79vVAA/1.XolB/TM --------------------------------------------------------------------~-> To Post a message, send it to: [email protected] To Unsubscribe, send a blank message to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/skychart-discussion/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
