The cross on the left is the ‘Petrine Cross’,
A.K.A the cross of Saint Peter. Simon Peter did not feel worthy of being crucified in the same fashion as Jesus Christs, and requested his crucifixion be inverted for the sake of humilty.
As such it is also one of the symbols of the Papacy and the Keys of Heaven.
So if you think it is an edgy 'Satanic’ symbol or in someway alternative - it quite literaly is one of the most powerful and well known Catholic symbols.
The cross on the right is the 'Leviathan Cross’, it is mad up of a double cross and the infinity symbol, and is also the Alchemical symbol for Sulphur, or in the East, Brimstone.
It symbolises the unity and eqaulity in all things, the free Will of the human soul.
It was created by the Knights Templar and adopted by Anton LaVey in The Satanic Bible as Sulphur is a Masculine Fire element, and the association between Sulphur/Brimstone in the Biblical texts refering to Hell, and the fact that it represents ones own ability to control their destiny.
I like this particular image (origin unknown at present), because the Petrine Cross is on the Left, and the Leviathan Cross is on the Right - when the left and right hand philosophies are considered, it shines a light on the darkness of Christianity, and the stigma now attached to the symbol of freedom for the human soul, as a result of the Templar arrests, assassinations and deaths by decree of Pope Clemant V and Philip IV of France.
You’re probably wondering- why is this called the Rotten Egg nebula…it doesn’t even look like an egg! Well, it got this name because it contains a lot of sulphur, an element that, when combined with other elements, smells like a rotten egg!
This nebula is actually called the Calabash Nebula. It is a spectacular example of the death of a low-mass star like the sun. This image shows the star going through a rapid transformation from a red giant to a planetary nebula, during which it blows its outer layers of gas and dust out into the surrounding space. The recently ejected material is spat out in opposite directions with immense speed. The gas shown in yellow is moving close to one million kilometers per hour (621,371 miles per hour)!!