Section 4b
At what point in its orbit does an Earth-orbiting satellite travel the fastest?
The speed at which a spacecraft must be traveling to leave Earth's gravity without using its rockets anymore is called....
escape velocity
navigational satellites
A satellite stays above the same point on the earth's surface in a.....
geostationary orbit
Which type of satellites help defend countries against attach and can photograph foreign installations?
military satellites
A satellite equipped with special devices to detect radiation that cannot penetrate Earth's atmosphere is an....
astronomical satellite
how do Earth observation satellites work?
detecting different forms of electromagnetic radiation
an unmanned spacecraft launched specifically to explore the unknown is a...
space probe