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:
“The political horizon looks dark and lowering; but the people, under Providence, will set all right.”
—Abraham Lincoln (1809–1865)
“Why should I feel lonely? is not our planet in the Milky Way?”
—Henry David Thoreau (1817–1862)
“By being seldom seen, I could not stir
But like a comet I was wondered at.”
—William Shakespeare (1564–1616)