13.0 Displaying deep sky objects Click the check boxes to control which classes of deep sky objects are displayed (Star Clusters, Galaxies, Nebulae and Active sources). Use the Show pop-up menus to display the different classes of deep sky objects as images, areas or icons. Active sources (such as radio sources and quasars) can only be displayed as icons. Note that if Image is selected, the object will only be displayed if it is brighter than the Limiting magnitude. Return to top RedShift contains specific images based on photographs for nearly 100 important deep sky objects. As you zoom in on these objects, these images will appear. Other deep sky objects are represented by generic images, typical of the object type. Return to top   To label deep sky objects with their names or numbers click the Labels check-box and select a label type from the pop-up menu. Note that not all deep sky objects have proper names. Return to top  13.1 Filtering deep sky objects by magnitude RedShift is pre-set to display deep sky objects with magnitudes between -2 and 8 (dimmer deep sky objects have higher magnitude values). In the Deep sky filter dialog use the Magnitude slider to filter which deep sky objects are displayed (based on their magnitude). Note that the Magnitude slider lets you set both upper and lower limits on magnitude. Use the Labelled slider to filter which of the displayed deep sky objects are labelled. Return to top  13.2 Displaying selected types of deep sky object Click the various deep sky object type buttons to switch the display of deep sky objects on and off. The icons used by RedShift are shown on each button. Return to top