... In most all observed cases, the rotation curve is either flat or rising within the optically observed part of the galaxy. ... Note that, in general, spirals have an exponential light distribution: . I(r) = I o e -(a/r) . ...
... NGC 2403 is a galaxy very similar to M33 . It is a late-type multi-arm spiral with large scale sta formation. ... NGC 2403 is a galaxy very similar to M33 . It is a late-type multi-arm spiral with large scale sta formation. ...
... Sextans A is a low mass dwarf companion to the Milky Way Galaxy. ... The goal of this observation is to detect hot stars in this galaxy. ... NGC 2903 Is a relatively nearby mostly face-on galaxy with active star formation. ...
... Since the orbital period of the Sun around the center of the Galaxy is about 250 million years then every 100-150 million years the earth is in a spiral arm which is a region of high supernova density. ...
... Since the orbital period of the Sun around the center of the Galaxy is about 250 million years then every 100-150 million years the earth is in a spiral arm which is a region of high supernova density. ...
... Since the orbital period of the Sun around the center of the Galaxy is about 250 million years then every 100-150 million years the earth is in a spiral arm which is a region of high supernova density. ...