spectral

How do the other spectral characteristics of The Cliff arise?

This dual capability offers new insights into the acceleration limits of astrophysical sources and the spectral signatures they contribute.

Researchers said that if both spectral features are confirmed, the object cannot be an isolated dark star, but rather may be a dark star embedded in a metal rich environment.

Upon opening the door, the man finds “darkness there and nothing more,” though just out of his view we can see a spectral figure floating in the hallway.

There’s also a ghost in the movie, I think — at least, there’s a heavy hinge that shouldn’t be able to open without a spectral nudge.