.	Titles	Mayan Observatory, 'Caracol' at Chichen-Itza	Aztec astronomer from Codex Mendoza
FIG. e-00	FIG. e-01	FIG. e-02	FIG. e-03
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution
Multiple Mirror telescope at Mt. Hopkins, Arizona	Very Large Array (VLA) of radio Telescopes, New Mexico	UHURU, the first X-Ray Satellite	The UHURU map of X-Ray objects
FIG. e-04	FIG. e-05	FIG. e-06	FIG. e-07
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution
The Sun in X-Ray	The Einstein Observatory-Artist's conception	Einstein Observatory prepared for launch	Optical expert prepares quartz tube
FIG. e-08	FIG. e-09	FIG. e-10	FIG. e-11
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution
Schematic of grazing incidence telescope	Cutaway view of Einstein and instruments	Control center at the NASA-Goddard Space Flight Center	Einstein images displayed on video screen in data center at Cambridge, Mass.
FIG. e-12	FIG. e-13	FIG. e-14	FIG. e-15
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution
Launch of the HEAO-2, November 13, 1978	Alpha Centauri, a near double star	X-Ray stars in the central Hyades region	Optical view of the Eta Carinae nebula (NGC 3372)
FIG. e-16	FIG. e-17	FIG. e-18	FIG. e-19
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution
Eta Carinae in X-Rays (wide-angle view)	Central region of Eta Carinae in X-Rays (high-resolution view)	Optical image of Crab nebula in Taurus	Crab nebula in X-Rays
FIG. e-20	FIG. e-21	FIG. e-22	FIG. e-23
by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution	by: Smithsonian Institution