Explanation: What is the most spook-tacular nebula in the galaxy? One contender is LDN 43, which bears an astonishing resemblance to a vast cosmic bat flying amongst the stars on a dark Halloween night. Located about 1400 light years away in the constellation Ophiuchus, this molecular cloud is dense enough to block light not only from background stars, but from wisps of gas lit up by the nearby reflection nebula LBN 7. Far from being a harbinger of death, this 12-light year-long filament of gas and dust is actually a stellar nursery. Glowing with eerie light, the bat is lit up from inside by dense gaseous knots that have just formed young stars.
by Henry Wadsworth Longfellow
All houses wherein men have lived and died
Are haunted houses. Through the open doors
The harmless phantoms on their errands glide,
With feet that make no sound upon the floors.
We meet them at the door-way, on the stair,
Along the passages they come and go,
Impalpable impressions on the air,
A sense of something moving to and fro.
There are more guests at table than the hosts
Invited; the illuminated hall
Is thronged with quiet, inoffensive ghosts,
As silent as the pictures on the wall.
The stranger at my fireside cannot see
The forms I see, nor hear the sounds I hear;
He but perceives what is; while unto me
All that has been is visible and clear.
So from the world of spirits there descends
A bridge of light, connecting it with this,
O’er whose unsteady floor, that sways and bends,
Wander our thoughts above the dark abyss.