by owlice » Sat Jul 06, 2013 4:51 pm
bmesser wrote:Hi
There's no doubt about it NGC 6384 is a great spiral galaxy - but we've seen exactly the same image a couple of times in the last 18 months.
Most of the times when you show a repeat you show greater resolution but not with this one.
Where, please? In searching APOD, I see this particular galaxy shown twice before, on
March 22, 2011, and on
July 12, 2007. The latter APOD is a different image entirely; the March, 2011 image -- shown on APOD over two years ago -- is today's Hubble image, which was
released in February, 2011. I did not find this image appearing in the past 18 months at all, nor "a couple of times" before ever. Maybe my searching is in error?
In any case, APOD does, by design, show repeated images; here is what the
APOD FAQ says about repeats:
Q4: Have some APOD pictures been run more than once?
A4: Yes. Many of our readers have been with us less than a year and are unaware of some really spectacular or important astronomy pictures. New information about old pictures is becoming available over the WWW. The text and links for rerun pictures will make use of this newly available information. So although the picture might be old, some of the text and links of each APOD will be new. Also, more web surfers have larger bandwidth connections, which allows us to post higher-resolution image files that can be transferred conveniently. Software to handle more sophisticated image file formats has also become more common, so the picture's size and/or format might be new. Lastly, rerunning APODs saves us time and helps us update our archive. In general, our rerun policy currently is to only rerun APODs more than one year old to keep the pictures relatively "new" to new APOD viewers. We will almost never rerun more than two pictures in any given week. So when you load the current APOD,it is still, most probably, a new picture.
[quote="bmesser"]Hi
There's no doubt about it NGC 6384 is a great spiral galaxy - but we've seen exactly the same image a couple of times in the last 18 months.
Most of the times when you show a repeat you show greater resolution but not with this one. [/quote]
Where, please? In searching APOD, I see this particular galaxy shown twice before, on [url=http://apod.nasa.gov/apod/ap110322.html]March 22, 2011[/url], and on [url=http://apod.nasa.gov/apod/ap070712.html]July 12, 2007[/url]. The latter APOD is a different image entirely; the March, 2011 image -- shown on APOD over two years ago -- is today's Hubble image, which was [url=http://www.spacetelescope.org/images/potw1108a/]released in February, 2011[/url]. I did not find this image appearing in the past 18 months at all, nor "a couple of times" before ever. Maybe my searching is in error?
In any case, APOD does, by design, show repeated images; here is what the [url=http://apod.nasa.gov/apod/ap_faq.html]APOD FAQ[/url] says about repeats:
[quote]Q4: Have some APOD pictures been run more than once?
A4: Yes. Many of our readers have been with us less than a year and are unaware of some really spectacular or important astronomy pictures. New information about old pictures is becoming available over the WWW. The text and links for rerun pictures will make use of this newly available information. So although the picture might be old, some of the text and links of each APOD will be new. Also, more web surfers have larger bandwidth connections, which allows us to post higher-resolution image files that can be transferred conveniently. Software to handle more sophisticated image file formats has also become more common, so the picture's size and/or format might be new. Lastly, rerunning APODs saves us time and helps us update our archive. In general, our rerun policy currently is to only rerun APODs more than one year old to keep the pictures relatively "new" to new APOD viewers. We will almost never rerun more than two pictures in any given week. So when you load the current APOD,it is still, most probably, a new picture. [/quote]