Sentences with phrase «average number of galaxies»

Not exact matches

For example, the seeming unlimited number of galaxies (with each containing anywhere from an estimated 10 to 500 billion stars) and the precise order that exists within the universe, and the shear distance between stars (an average about 4.2 light years or about 25 trillion miles), has caused some to stop and look in awe.

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.

In optical light, void galaxies look bluer on average than galaxies in denser regions, thanks to starlight beaming from a goodly number of hulking, bluish stars.

Basically, you take the average number of stars in the galaxy and you ask what percentage have habitable planets.

He found that even if half of our galaxy was full of alien noise, the average number of signals that we would be able to detect from Earth is less than one (Scientific Reports, doi.org/b562).

You probably get the idea at this point, but just to hammer it home: On average, galaxies are separated by millions of light years — and the latest estimates put the number of galaxies in the universe at around 500 billion.