Proposed (future) X-ray Observatory Satellites
There are several projects that are proposed for X-ray observatory satellites. See main article link above.
Read more about this topic: X-ray Astronomy
Famous quotes containing the words proposed, observatory and/or satellites:
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—Susan B. Anthony (1820–1906)
“Where there is an observatory and a telescope, we expect that any eyes will see new worlds at once.”
—Henry David Thoreau (1817–1862)
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