Terms & Definitions
The path a sun follows in a year.
Ecliptic
Measuring time using time zones
Standard Solar Time
First artificial satellite
Sputnik 1
Used to study the heavens
astronomical
What calendar system do use
Gregorian
Device that splits light into a spectrum
Spectroscope
Time based on stars
Sidereal time
1st US satellite
Explorer 1
helps to make maps and spot forest fires
Earth observation
What does A.D. stand for
Anno Domini
Zenith
System of Timekeeping that divides the day into AM & PM
12 hour time
An unmanned spacecraft used to explore the unknown
Space Probe
relays telephone conversations and radio/television broadcasts
Communications
What does B.C. stand for
Before Christ
The spot when an observer looks directly below
Nadir
Uses the equation of time
Apparent Solar time
The type of orbit when a satellite stays above the same point
Geostationary
includes GPS (global positioning system)
Navigational
The calendar where we get the names of our months
Julian
The technique used to flex and bend a mirror through use of a computer.
Adaptive optics
Unit of time it takes the Earth to orbit the sun
Solar year
A visible light telescope launched into space in 1990
Hubble Space Telescope
Helps meterologists
Weather
Unit of time not based on a heavenly body
Week