There's these awful guns (and armour) that are yellow exotics and are considered the worst in the game. Don't be fooled by their attack/defence rating- the higher it gets the less damage you do and the more you take. You want to be dismantling these straight away as they give you exotic shards which unlock extra planets. You need 5 for Jupiter, 5 for Mercury, and 10 for Saturn. Most exotics give you 1 shard but there are certain exotics which are the worst of the worst and dismantling them gives you 5 exotic shards! These are: -Gjallarhorn -Icebreaker -Helm of Saint 14 -Heart of the Praxic Fire -Vex Mythoclast -Radiant Dance Machines Be sure to dismantle these straight away because they are useless and those planets are waiting to be unlocked! To unlock, you must: 1. Gain enough shards to unlock the planet. 2. Complete the story mode without firing a single gunshot. 3. Solo the Vault of Glass at level 23. 4. Get a 15 kill streak in the crucible using 'No Land Beyond'. 5. Assassinate Master Rahool in the hidden mission 'Revenge on RNGesus'. 6. Shoot the desired planet you would like to unlock whilst patrolling- this can take between 2-30 minutes. Then you are ready to go! EDIT: Thorn also gives you 5 shards for dismantling it.