Within the cosmic disk are smaller spinning systems with entities that mostly appear to orbit some large energy source, usually a star.
Entities within a system typically include, but are not limited to, the following:
Gas giants
Planets
Minor planets
Rocks & asteroids
Junk & debris
Space stations
For the centres of these systems, we have observed stars of the following sizes and colours:
☼ Red giants
☼ Blue giants
☼ Red main sequence stars
☼ Blue main sequence stars
☼ Yellow main sequence stars
☼ White dwarves
☼ Red dwarves
☼ Brown dwarves
Our cleverest star scientists figured out there are some really dark stars as well:
• Black holes
• Black dwarves
Sometimes pairs of the above types of stars will orbit eachother:
∞ Binary systems
Alongside these we have also detected strange signals from the following:
Φ Pulsars
Φ Magnetars
Φ Neutron stars
If we don't see a star soon enough, they explode and leave behind a big cloud of colourful gas:
§ Nebulæ
There are also some anomalous pockets in the cosmos where we can look straight through and see out somewhere else:
Θ Worm holes (Note: Nobody has tried going through one yet)