### location | route | orbit:

Low orbit
* work well for satellites that take pictures of the Earth.
+ Satellite (artificial), Orbits
  * To stay in orbit, the satellite's sideways speed must balance the force of gravity. Closer to the Earth, in LEO, the satellites must move faster to stay in orbit. Low orbits work well for satellites that take pictures of the Earth. It is easier to put a satellite in low Earth orbit, but the satellite appears to move when viewed from Earth. But constantly changing positions does not work for satellite TV and other types of satellites that send and receive a lot of information. Those need to be in geostationary orbit.

Planetary orbit
* All planetary orbits are ellipses, with the sun at one focus of the ellipse
  - lie in almost the same plane
* Most planetary orbits lie nearly in the same plane.
* are all nearly circular
  - ellipses with the sun at one focus
* are nearly circular
* have a distinct elliptical shape.

### location | route:

Trend
* Describe the trends in data communications.
* affect development
  - ecological stability
  - economic development
  - markets
  - resources
* are a measure of how the system has been changing over time, either improving or worsening
  - way to describe a change over time
  - academic journals
  - magazines
  - new cultural movements that follow their own course of birth, life, and death
* are patterns in the values of a ratio
  - or shifts according to time
* are the products of media, the result of the culture that media helps to create
  - result of the interaction of institutions, people and circumstances
  - things that change most frequently, paradigm shifts change the least frequently
* begin with the people who create something new, something different.
* contribute to success.
* correspond to contamination levels
* define the context in which the organisation functions.
* develop as animals interact with the terrain and with each other.
* emerge and disappear, shapes and colours change
  - from data when they are summarized in a graph
* exist in all time frames and all markets.
* increase likelihood.
* influence growth
  - market growth
* is the direction down the plunge of the line.
* long term movement in a time series.
* receive attention.
* refer to consistent price movements over a period of years.
* reflect growth
* seen in the fashion industry also play a role in fabric availability.
* term used to describe the persistence of price movement in one direction over time.
* watching is the treadmill of thinking aerobics.

### location | route | trend:

Demographic trend
* imply that such problems are likely to affect growing numbers of older people.
* indicate dramatic changes as the population of the United States ages
  - people are busy and value their free time
* mean no new supply of young people to pay pensions for older workers.
* show that the number of elderly people is on the increase.

Economic trend
* are important to understand when making many of our decisions.
* tend to develop in unison in the same sector, country, or region.

Fashion trend
* Most fashion trends revolve around showing lots of skin, or at least some skin.
* can affect the demand for dry cleaning.
* seem to trace their way from one end of the western seaboard to the other.

Global trend
* affect everyday lives.
* enhance the urgency of economic matters.

Market trend
* are the least expensive aspect of the marketplace to study
  - upward or downward movement of a market, during a period of time
* is as important as pricing.
* show a growing market for socially responsible businesses and products.

Population trend
* Population Trends Take a look at population growth over time.
* are an integral part of our common future.
* parallel the recent history of Mediterranean cities.

Russia
* includes Caspian.
* is part of Eurasia.