1. Tracking Chandra in Orbit
10 second exposure with a 25 cm aperture telescope. The altitude at the time was 110,000 km.
(Photo: G. Emerson, E.E. Barnard Observatory)

2. Tracking Chandra in Orbit
2 minute exposure with a 7.5 cm aperture, F4.0 camera.
(Photo: G. Emerson, E.E. Barnard Observatory)

3. Illustration of Chandra's Orbit
A schematic view of Chandra's orbit from above, showing the radiation belts, and the orbit of the moon.
(Photo: CXC/M. Weiss)

4. Illustration of Chandra's Orbit
A schematic side view of Chandra's orbit, showing the inner and outer radiation belts.
(Photo: NASA/CXC/M. Weiss)

5. Illustration of Chandra's Orbit
A schematic view of Chandra's orbit from above, showing the radiation belts.
(Photo: NASA/CXC/M. Weiss)

6. Illustration of Chandra's Orbit
This illustration depicts the firings of the propulsion system to take the Chandra observatory to its final orbit after deployment from Space Shuttle Columbia.
(Photo: NASA/NGST)