| 1 | Firm or compact in substance. | |
| 2 | A white dwarf retains about half of its mass but becomes incredibly dense because of its small size. | |
| 3 | Because the llareta is dry and dense, it burns well, like peat. | |
| 4 | At top center is NGC 7319 and the compact galaxy group known as Stephan's Quintet. | |
| 5 | Earthlings can only wonder at the dense star clusters and massive gas and dust clouds that reside there. |
