Sentences with phrase «number of planets per»

Where N is the number of stars in the Milky Way galaxy; fp is the fraction with planets; ne is the number of planets per star capable of supporting life; fl is the fraction of planets where life evolves; fi is the fraction where intelligent life evolves; and fc is the fraction that communicates; and fL is the fraction of the planet's life during which the communicating civilizations live.

The findings could also modify the famed Drake equation, which estimates the number of civilizations in the Milky Way, by lowering the estimate for the average number of planets per star that can support life.

Drake multiplied the number of sunlike stars in our galaxy that form each year by a handful of variables: the fraction of those stars that have planets; the number of planets per planetary system where life could exist; the fraction of habitable planets where life actually arises; the fraction of those where intelligence emerges; the fraction of intelligent species that develop interstellar communication; and finally, the average length of time that those communicating civilizations survive.

Not exact matches

Two are astronomical: the fraction of stars with planets and the mean number of habitable planets per star.

In the 1960s and 1970s, the global population was growing at an annual rate of 2 per cent, enough to double the number of people on the planet every 30 years or so.

PxSxExC, P is the number of people on the planet, S is the services per person, E is the energy per service, and C is the carbon per unit energy.

Each lost planet means a lost resource of some sort, and players will have limited chances to manage their fleets as there's a limited number of deployments per turn.

Dave Cooke (# 303), +4 C per doubling is a somewhat higher than usual (but still reasonable) number that includes feedbacks such as an increasing amount of atmospheric H2O but also non-greenhouse effects such as a diminshed reflective ice cover on the surface of the planet.

n (i) = The sustainable number of people that can occupy any area of this planet = The Number of people living at per capita energy usage E (i)[N (E (i)-RSB- divided by the number of possible people «allowed» by thermodynamic considerations in that Fermionic state [g (i)number of people that can occupy any area of this planet = The Number of people living at per capita energy usage E (i)[N (E (i)-RSB- divided by the number of possible people «allowed» by thermodynamic considerations in that Fermionic state [g (i)Number of people living at per capita energy usage E (i)[N (E (i)-RSB- divided by the number of possible people «allowed» by thermodynamic considerations in that Fermionic state [g (i)number of possible people «allowed» by thermodynamic considerations in that Fermionic state [g (i)-RSB-.

Like so much of the planet, Germany has seen its number of extremely hot days increase across the last several decades, with the number of days where temps exceeded 30 degrees Celsius (86 degrees Fahrenheit) rising from three per year to eight.

So if we want to prevent collapse, we need to get our numbers and per capita consumption safely within the carrying capacity of the planet, and do it before we collapse.

Brighter Planet's 350 Challenge is inspired by Bill McKibben's awareness campaign about the importance of the number 350, the parts per million of CO2 in the atmosphere that we must aim for if we want to keep the planet relativelyPlanet's 350 Challenge is inspired by Bill McKibben's awareness campaign about the importance of the number 350, the parts per million of CO2 in the atmosphere that we must aim for if we want to keep the planet relativelyplanet relatively safe.