# What are the numbers for the Drake equation?

## What are the numbers for the Drake equation?

Widely quoted but at best vaguely known values for these factors are: R* = 10/yr, fp = 0.5, ne = 2, fl = 1, fi fc = 0.01, and thus N = L/10.

### What is the Drake Equation dictionary?

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy.

#### What is the purpose of the Drake Equation quizlet?

– Drake Equation- lays out the factors that are important in determining the number of transmitting civilizations.

What question does the Drake Equation attempt quizlet?

What question does the Drake equation attempt to answer? What is the number of technological civilizations in the Milky Way Galaxy? Which term of the Drake equation is completely unknown and the hardest to determine? average lifetime of a technologically competent civilization.

What are the odds of life forming on Earth?

What we don’t know is that constant chance. It could be that once conditions are favorable, life has a 10% chance of appearing in any given hundred million years. Or 90%.

## What is the Drake equation for life on Earth?

The equation asks first about the average rate of star formation in the galaxy. This doesn’t sound particularly applicable to life, but that’s the beauty of the Drake equation. It realizes that to have a species, you have to have a planet, and to have a planet, you must have stars.

### Why did Frank Drake create the Drake equation?

Frank Drake needed to come up with an agenda for the meeting in order to provide some structure to the discussion. To serve as an agenda, he devises the Drake Equation. Sometimes known as the Sagan-Drake Equation in the past, the meeting was attended by approximately a dozen interested parties.

#### How many planets have been discovered according to the Drake equation?

At the time the Drake Equation was created, the only planets that were known were those of our own solar system. Since that time approximately 200 extrasolar planets have been discovered. When the Drake Equation was created, it was thought that planets would only be found in single star systems.

Which stars are not suitable for the Drake equation?

For example, very massive stars are not considered suitable. Some versions of the Drake Equation use the R term for the overall rate of star formation and then add a second term to estimate the fraction of these stars that are like our own Sun.