-
distant observations preferentially select the most
luminous objects. The
isophotal diameter is
introduced as a
conventional way of
measuring a galaxy's size...
- by the
naked eye. The
Milky Way is a
barred spiral galaxy with a D25
isophotal diameter estimated at 26.8 ± 1.1 kilop****cs (87,400 ± 3,600 light-years)...
-
lenticular galaxy at the
center of the
Abell 2029
galaxy cluster. It has an
isophotal diameter at
about 123.65 to 169.61 kilop****cs (400,000 to 550,000 light-years)...
-
million light-years away in the
constellation Ursa Major. It has a D25
isophotal diameter of 29.44 kilop****cs (96,000 light-years).
Because of its relative...
- Major. It is the second-largest
member of the M81 Group, with the D25
isophotal diameter of 12.52 kilop****cs (40,800 light-years). It is
about five times...
-
million light-years away in the
constellation Sculptor. It has a D25
isophotal diameter of 44.23 kilop****cs (144,300 light-years), and a m**** of about...
- and superm****ive
black hole m****. It is a
standalone galaxy with an
isophotal diameter at 25.0 r-mag/arcsec2 of
about 242,700 light-years (74.40 kpc)...
-
spiral galaxies in the sky, and is
visible with binoculars. It has an
isophotal diameter at
about 36.24 kilop****cs (118,000 light-years). Its nickname...
- has an
angular diameter of 16.20 arcseconds,
corresponding to a
large isophotal diameter of 206.1 kilop****cs (672,200 light-years),
making it one of...
-
indicating a
spiral shape with a weak bar
feature and
loosely wound arms. The
isophotal axis
ratio is 0.32,
indicating that it is
being viewed at an angle. M66...
