On a recent 2old2play livestream, Deej confirmed that each planet will have one location to explore when the game launches - much like the section of Russia we saw during the last couple of weeks.
“We’re calling them destinations. You go to Mars, you go to the moon, you go to Venus, you’ve got Earth,” DeeJ explained.
“We’ve revealed everything that you’ll explore in the first version of the game,” he continued. “You’ll be [going to] Earth. Your story takes you from the wastes of the Cosmodrome, which was essentially our Cape Canaveral of the Golden Age. It’s where we launched off as a global society, where we rushed out into the solar system to colonise and use what the Traveller gave us.”
Even though there’s only one area to explore per location, the beta showed that there is a large amount of area to cover on Earth alone. As most of you are aware parts of Old Russia were blocked off by barriers or by Fallen and Hive enemies that were "immune" to combat or much higher than the level 8 cap of the beta. In the brief 2-hour period that the Moon was made available in the beta on Saturday night we were able to explore deep into the Hellmouth for almost an hour before hitting these same barriers so we're very excited about what is included within these "sandboxes".
In all, there are seven different “destinations” in Destiny for players to explore — the Earth, the Moon, Mercury, Venus, Mars, and The Reef (a part of the asteroid belt), plus the Crucible multiplayer maps. DeeJ also confirmed that the areas seen in the Crucible maps for Mars and Venus during the beta will be part of the regular destinations for the single/coop section of the game as well.
It's also be found, by Reddit user DestinyDB, through data mining some more information about the missions and destinations. This is by no means everything, or at least we don't believe it is, but even so it's a lot of information and therefore missions to take part in (and remember there are also "harder" versions of most assignments too).
Warning: The below could be considered spoilers so avoid direct eye contact for safety if you're worried....
Earth Story Missions
Old Russia, Earth – The cradle of humanity – a world of ancient glory, waiting to be retaken.
A Guardian Rises (level 1)
Restoration (levels 2, 5)
The Dark Within (levels 3, 6)
The Warmind (levels 4, 7)
The Last Array (levels 5, 8)
Earth Story Challenges
The Queen’s Wrath (Kill Order; level 24)
Nightfall: The Devils’ Lair (levels 22, 26, 28)
The Devils’ Lair (levels 6, 8)
Moon Story Missions
Oceans of Storms – An ancient evil stirs beneath the shattered surface of our moon.
The Dark Beyond (levels 6, 9)
The Sword of Crota (levels 7, 10)
The World’s Grave (levels 7, 10)
Shrine of Oryx (levels 8, 11)
Chamber of Night (levels 8, 11)
Nightfall: The Summoning Pits (levels 22, 26, 28)
The Summoning Pits (level 12)
The Reef Story Missions
The Reef, Asteroid Belt – Dare to strike a bargain with the ruthless Queen.
The Awoken (level 10)
A Key Awaits (level 12)
Venus Story Missions
Ishtar Sink – The jungles of Venus conceal great treasures – and terrible power.
A Stranger’s Call (levels 10, 12)
Ishtar Collective (levels 10, 12)
The Archive (levels 11, 13)
Scourge of Winter (levels 11, 13)
Eye of a Gate Lord (levels 12, 14)
Nightfall: The Nexus (levels 22, 26, 28)
Nightfall: Winter’s Run (levels 22, 26, 28)
The Nexus (level 14)
Winter’s Run (level 14)
Mars Story Missions
Meridian Bay – In the sandswept carcass of a lost city, dark forces gather for war.
Exclusion Zone (levels 15, 17)
The Garden’s Spire (levels 16, 18)
A Rising Tide (levels 17, 19)
The Buried City (levels 17, 19)
The Black Garden (levels 18, 20)
Nightfall: Cerberus Vae III (levels 22, 26, 28)
Cerberus Vae III (level 18)
Dust Palace (level 18)
Confirmed Crucible Maps
Shores of Time
The Burning Shrine