86.1
factor that affects the length of the seasons
What is distance to the sun
detecting different forms of electromagnetic radiation
What are Earth observation satellites
first Chinese astronaut
Who is Yang Liwei
oldest form of renewable energy, obtained from plant and animal products
What is biomass energy
point in orbit when an Earth-orbiting satellite travels the fastest
What is distance to the sun
telescope that uses a large, curved mirror as the objective
What is a reflecting telescope
abbreviation A.D. meaning
What is after death
pouring used automotive fluids into a lake would be this type of water pollution
What is point-source
third nation to successfully launch a manned spacecraft
What is China
unit of time larger than a day, that is not based on the motion of a heavenly body
What is a week
sun's northernmost points on the ecliptic
What are equinoxes
moving from first quarter to full, the moon is described as
What is waxing gibbous
navigational satellites are a part of what satellite system
What is Global Positioning System
What is escape velocity
satellite equipped with special devices to detect radiation that cannot penetrate Earth's atmosphere
What is a astronomical satellite
plants are a typed of what factor
What is biotic factor
satellites that help defend countries against attack and can photograph foreign installations
What are military satellites
two points at which the apparent path of the sun crosses the celestial equator
What are equinoxes
rocket using various combinations of liquid chemicals that expand greatly when they react with each other
What is liquid-fuel
Familiar asterism part of Ursa Major
What is the Big Dipper