The outlook for energy consumption is based on changeable projections for future reserves. What might be the most important factor in making a projection

The most important factor for energy outlook would be the demand factor

Explanation:

Any outlook for energy consumption includes various determinants. Among these the most important is “demand factor”. The projections which are made for future reserves base themselves on the average consolidated demands concurrently.

This demand factor is highly volatile and is subject to intensive fluctuation. e.g. Scientists have predicted that fossil fuels would run out in the next 75 years at current usage. However, the demand for fossil fuels has decreased relatively due to various factors such as increased dependence on renewables, nuclear power, slowdown and other factors. Hence it becomes of paramount importance to gauge demand factor correctly to make realistic projections.  

light-year  

the distance that light travels in a vacuum in one year, equal to about 9.46 trillion km (5.88 trillion mi). light-years are used in measuring interstellar and intergalactic distances.  

parsec  

a unit of distance used in astronomy, equal to about 3.25 light years (3.08 × 1016 meters).  

parallax  

the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due to its being observed from the earth instead of from the sun (annual parallax or heliocentric parallax)  

absolute magnitude  

the magnitude (brightness) of a celestial object as it would be seen at a standard distance of 10 parsecs.  

apparent magnitude  

the magnitude of a celestial object as it is actually measured from the earth.  

redshift  

an increase in the wavelength of radiation emitted by a celestial body as a consequence of the doppler effect.  

the great thing about your imagination is that it doesn't have to make sense! if i were you i would be stuck in space, no communication with earth travelling around and around, you can only guess how long its been since your communication broke down. you land on an undiscovered planet, you do a scientific investigation examining the elements and conditions. you come across alien lifeforms.  

best of luck!