X-ray Dark Planet/comet
Main article: X-ray dark planetX-ray observations offer the possibility to detect (X-ray dark) planets as they eclipse part of the corona of their parent star while in transit. "Such methods are particularly promising for low-mass stars as a Jupiter-like planet could eclipse a rather significant coronal area."
As X-ray detectors have become more sensitive, they have observed that some planets and other normally X-ray non-luminescent celestial objects under certain conditions emit, fluoresce, or reflect X-rays.
Read more about this topic: X-ray Astronomy
Famous quotes containing the words dark, planet and/or comet:
“Spite of all the Indian-summer sunlight on the hither side of Hawthorne’s soul, the other side—like the dark half of the physical sphere—is shrouded in a blackness, ten times black.”
—Herman Melville (1819–1891)
“Are there no Moravians in the Moon, that not a missionary has yet visited this poor pagan planet of ours, to civilize civilization and christianize Christendom?”
—Herman Melville (1819–1891)
“By being seldom seen, I could not stir
But like a comet I was wondered at.”
—William Shakespeare (1564–1616)