Space Telescope Parts & Instruments by the sciLINKS program, a
service of National Science Teachers Association. Copyright
2001. sunlight into electricity in order to power the telescope.
Hubble's information to communications satellites called the
Tracking & Data Relay Satellite System (TDRSS) for relay to
ground controllers at the Space Telescope Operations Control
Center (STOCC) in Greenbelt, Hubble's optics in the same way a
camera's lens cap shields the lens. Hubble from extreme
temperatures. Thermal Blanket Layer Hubble from the harsh space
environment with stainless steel sheets. as the master control
system (monitors health, controls movement, holds observation
targets). power when Hubble is in the Earth's shadow (charged by
solar power from the arrays during daylight). powers Hubble and
recharges the batteries. Six batteries power Hubble Hubble
steady, measures distances, and finds and keeps a target
Continually report Hubble's position and sense any movement of
the telescope. Each Rate Sensor Unit h