They're called eggsteroids now, okay? Like lots of other things in the latest version of Rovio's hit mobile franchise, the shiny collectibles in Angry Birds Space have changed. The golden orbs open up black holes that teleport you to secret levels that contain tributes to old-school games like Space Invaders, Breakout and Super Mario Brothers.

Eggsteroids can be tricky to spot, though, so we're starting up a rolling list of where they are and what they do. We'll be updating this list through the day. Chime in with what you've found in the comments below, too.

Where The Egg Is: Level 1-9

What It Unlocks: Space Invaders homage. Use the exploding birds to shoot down a pig in a UFO.

Where The Egg Is: Level 1-20, in the bushes of the planetoid

What It Unlocks: Super Mario Brothers homage. It's a recreation of World 1-1 from Nintendo's classic, so you'll want to aim at the floating block.

Where The Egg Is: Level 2-13, in the bush on the bottom left planetoid

What It Unlocks: Breakout homage. This nod at the classic Atari game lets your birds bounce around and ricochet the level.

Where The Egg Is: Level 2-25

What It Unlocks: This one looks like Bubble Bobble, no?

Where The Egg Is: Level 2-28

What It Unlocks: We've got no idea what this level is a homage to. Any thoughts?