The open cluster NGC 6253 is situated just 35 arc-minutes
north from magnitude 4 epsilon1 and magnitude 5.
It is situated only 6 arc-minutes
south and very close to magnitude 5.
Although tailored to detect the extreme ultraviolet, the satellite's state-of-the-art optics -- supersmooth, cylindrical mirrors whose thicknesses vary by no more than 10 atoms -- can't pinpoint sources to a region smaller than 3 arc-minutes
, or about one-tenth the width of the full moon as it appears in the sky.
compared to the 10 arc-minutes
typical of resolvers.
and have the ability to provide data more quickly since the output of a resolver must be digitized by a resolver-to-digital converter before it can be used, limiting the response speed of the servo loop.
Because the cloud, which lies in the southern constellation Puppis, extends some 20 arc-minutes
across the sky, he chose large-formet photographic plates -- 25 centimeters to a side -- to make the images.
What is more, there is an extremely faint galaxy, PGC 24516/ESO 18-G13, less than two arc-minutes
east of eta Chamaeleontis, sharing this new cluster's territory.
wide (about one-thirtieth the width of the moon as it appears from Earth).
6-magnitude components are nearly 2 1/2 arc-minutes
Since your review I have been correcting all the little errors including the standardized numbering of numbers greater than 1,000, the symbols for arc-minutes
and seconds, the limiting magnitude labels on some of the all sky maps, the orientation of text of the Aquarius chart, the degrees Celsius symbols, and the page numbering with "normal" numbers.
The image is about 3 arc-minutes
wide, with north toward the lower left.
Measuring 9 by 6 arc-minutes
, M32 lies just 1/3[degrees] south of the Great Galaxy's nucleus.
where [alpha] is right ascension, [delta] is declination, [DELTA][alpha]is the right-ascension change in minutes of time over 50 years, and [DELTA][delta]is the declination change in arc-minutes
5-magnitude spiral in Pegasus, Stephan's Quintet challenges you to resolve a clump of five faint galaxies packed into a mere 4 arc-minutes
You can, for example, display only the Herschel objects larger than 4 arc-minutes
in diameter, brighter than magnitude 14, within selected constellations, and above a certain altitude.