They realized that the Andromeda's disk survived an impact with a massive galaxy, which would question the common wisdom that such large interactions would destroy disks and form an elliptical galaxy
Moving 1[degrees]20' North, we come to another bright group member, the elliptical galaxy
NGC 3377 (mag 10.2).
But today, 10 billion years later, it would have grown into a giant elliptical galaxy
much more massive than the Milky Way.
The Sagittarius Dwarf Elliptical Galaxy
(SagDEG) is one satellite galaxy interacting with the Milky Way.
Eventually they'll merge and form one large elliptical galaxy
. This pair of colliding spirals is 300 million light-years away in the constellation Coma Berenices, Berenice's Hair.
The halo was found at the centre of the elliptical galaxy
NGC 7052 in the distant constellation of Vulpecula.
NGC 4898 is an elliptical galaxy
that appears round, while NGC 4894 is a lenticular galaxy, a class of galaxies that are intermediate between ellipticals and spirals.
The collision that presumably forms an elliptical galaxy
disrupts gas in the merging galaxies and provides "fuel" for the disk and acceleration mechanism.
At the center of the cluster is a large elliptical galaxy
containing the supermassive black hole.
An international team of researchers noticed just such a disturbance in the bright halo (shown) created by the supermassive elliptical galaxy
JVAS B1938+666 as it warps the view of a more distant galaxy.
Other topics include pulsar wind nebulae, absolute magnitude calibrations for the long period Cepheids, elliptical galaxy
formation, extragalactic globular clusters, diffuse atomic and molecular clouds, and the first results from the Spitzer Space Telescope.