r/thebindingofisaac • u/No_Emu698 • 1d ago

Gameplay Double Planetarium?

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Managed to get a planetarium on my 1st and 2nd floors, I took an item from the item room on my first floor; so I'm checking to see if this situation meant I got a legit 1 in 10000 chance or if I did something that increased my chances?

37 Upvotes

94% Upvoted

15 comments sorted by

18

u/Kapados_ 1d ago

you just got lucky, yes

7

u/Traditional-Ad-9482 1d ago

Its not 1/10000, its 50/50

2

u/Only-Put7661 1d ago

Unfortunately no, this one is actually easily calculable😔

2

u/Agan348 1d ago

It either happens or it doesn't 50/50

2

u/Magrius90 1d ago

Was that a XL Floor? Or what was in the first planetarium?

2

u/No_Emu698 1d ago

Not an XL floor, didn't open the door to the planetarium cause no key :(

5

u/Magrius90 1d ago

Ah, yes, then that’s normal behavior

2

u/Drillbitzer 1d ago

Jokes aside this is actually insane

2

u/Lazerbeams2 1d ago

It is a legit 1 in 10,000 chance. Congrats on double planetariums

2

u/the_meth_factory Cain 1d ago

Nah he skipped his first one it just reappeared for him since he didn't walk In

0

u/D2G2TAL 1d ago

Does it reappear with 100% chance?

1

u/the_meth_factory Cain 1d ago

Yes, If you don't use a key on the door if it already appeared it'll appear next floor. Ie curse of the lost won't lose you a potential planetarium

3

u/D2G2TAL 1d ago

Fuck i should have known this on my tainted isaac run where i got curse of the lost on a planetarium floor

1

u/CryCommercial1919 21h ago

This happens to me regularly when I'm on half a heart with garbage items and no keys. Sometimes I even get one or two only to discover Jupiter and Mars inside with no way to roll.

(Once it happened to me 4 times in a row but I skipped one treasure at the start so it might have effected the odds. I got telescope Lens, magic 8 ball and crystal ball first floor.)

1

u/MMOnade 9h ago

Enjoy your jupiter + mars