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physical object > artifact > device > instrument > artificial satellite > space telescope > X-ray space telescope > grazing-incidence telescope > Einstein

Einstein
subject			fact

Einstein	is an instance of grazing-incidence telescope
grazing-incidence telescope	has number of concentric surfaces
	has acronym XRT
X-ray space telescope	has wavelength sensitivity in gamma ray and X-rays
artificial satellite	has attitude control
	has ground communication station
	can have orbit decay date
	has launch vehicle
	has launch location
	has launch date
telescope	has angular resolving power
	has effective diameter
	has aperture
	has focal ratio
	has operator
	has purpose observe celestial objects
	has location
instrument	has operator
satellite	orbits a more massive physical object
	has approximately elliptical orbit
	has orbital period
	has orbital inclination
physical object	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material
artifact	has creator
	has creation date
	has owner

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