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:
“We are all dead men on leave.”
—Eugene Leviné, Russian Jew, friend of Rosa Luxemburg’s lover, Jogiches. quoted in Men in Dark Times, “Rosa Luxemburg: 1871-1919,” sct. 3, Hannah Arendt (1968)
“Why should I feel lonely? is not our planet in the Milky Way?”
—Henry David Thoreau (1817–1862)
“Ah, like a comet through flame she moves entranced
Wrapt in her music no bird song, no, nor bough
Breaking with honey buds, shall ever equal.”
—Stephen Spender (1909–1995)