What is the result of the Drake Equation?
The Drake equation amounts to a summary of the factors affecting the likelihood that we might detect radio-communication from intelligent extraterrestrial life. The last three parameters, fi, fc, and L, are not known and are very difficult to estimate, with values ranging over many orders of magnitude (see criticism).
Drake equation, also called Green Bank equation, equation that purports to yield the number N of technically advanced civilizations in the Milky Way Galaxy as a function of other astronomical, biological, and psychological factors.
How many galaxies are there?
The deeper we look into the cosmos, the more galaxies we see. One 2016 study estimated that the observable universe contains two trillion—or two million million—galaxies. Some of those distant systems are similar to our own Milky Way galaxy, while others are quite different.
How many stars are in the Milky Way?
100 billion - 400 billion Milky Way/Stars
What are the variables in the Drake equation?
R* = The rate of formation of stars that are suitable for the development of intelligent life. fp = The fraction of those stars with planetary systems. ne = The number of planets per solar system that have an environment suitable for life. fl = The fraction of suitable planets on which life actually appears.
How many stars does the Milky Way have?
100 billion - 400 billion Milky Way/Stars
How many variables are in the Drake Equation?
seven variables The Drake equation explores the chances that detectable alien civilizations exist using seven variables. While some predictions that use the equation are optimistic, a comprehensive new study suggests a strong likelihood that were alone in the Milky Way galaxy.
Why is it unlikely very massive stars would harbor planets with life?
A smaller amount of metal makes the formation of planets much less likely, under the solar nebula theory of planetary system formation. Any planets that did form around a metal-poor star would probably be low in mass, and thus unfavorable for life.
What galaxy do we live in?
the Milky Way We live in one of the arms of a large spiral galaxy called the Milky Way. The Sun and its planets (including Earth) lie in this quiet part of the galaxy, about half way out from the centre. 100 000 years to cross from one side to the other.
What is the 4 types of galaxies?
In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies.
What is the largest star in the universe?
UY Scuti The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
What are we looking at when we see the Milky Way?
When we look to the edge, we see a spiral arm of the Milky Way known as the Orion-Cygnus Arm (or the Orion spur): a river of light across the sky that gave rise to so many ancient myths. The solar system is just on the inner edge of this spiral arm.