Current Study Guide - Department of Physics and Astronomy
... What is the cosmic background radiation and why is it important? What is Dark Matter and Dark Energy and what is their role in modern cosmology? How would you define Life? What is a curious biochemical feature of life on earth? What does the term “encephalization” refer to? What is the characterist ...
... What is the cosmic background radiation and why is it important? What is Dark Matter and Dark Energy and what is their role in modern cosmology? How would you define Life? What is a curious biochemical feature of life on earth? What does the term “encephalization” refer to? What is the characterist ...
The Search for Extraterrestrial Life
... – Some of these stars likely have Earth-like planets which, if the Earth is typical, may develop intelligent life. – Presumably some of these civilizations will develop interstellar travel, as Earth seems likely to do. – At any practical pace of interstellar travel, the galaxy can be completely colo ...
... – Some of these stars likely have Earth-like planets which, if the Earth is typical, may develop intelligent life. – Presumably some of these civilizations will develop interstellar travel, as Earth seems likely to do. – At any practical pace of interstellar travel, the galaxy can be completely colo ...
SETI
... • Is there intelligent life on other planets? • If so, – Can we find them? – Can we try to communicate? • SETI is the Search for Extra Terrestrial Intelligence ...
... • Is there intelligent life on other planets? • If so, – Can we find them? – Can we try to communicate? • SETI is the Search for Extra Terrestrial Intelligence ...
Conversations with the Earth
... • It is the area in the galaxy whose boundaries are set by its calm and safe environment, and access to the chemical materials necessary for building terrestrial planets similar to the Earth. ...
... • It is the area in the galaxy whose boundaries are set by its calm and safe environment, and access to the chemical materials necessary for building terrestrial planets similar to the Earth. ...
ASTR101 Unit 14 Assessment Answer Key 1. It is believed that the
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
... 1. It is believed that the existence of liquid on a planet is a requirement for the existence of life. The habitable zone is the range of distances from a particular star such that the temperature of a planet would allow for liquid water on the surface. 2. The number of stars in the Milky Way Galaxy ...
A105 Stars and Galaxies
... Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have liquid water on its surface. Ev ...
... Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have liquid water on its surface. Ev ...
Fermi paradox
The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations, such as in the Drake equation, and the lack of evidence for such civilizations. The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a typical star, and there are billions of stars in the galaxy that are billions of years older. With high probability, some of these stars will have Earth-like planets, and if the earth is typical, some might develop intelligent life. Some of these civilizations might develop interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in about a million years.According to this line of thinking, the Earth should already have been visited by extraterrestrial aliens though Fermi saw no convincing evidence of this, nor any signs of alien intelligence anywhere in the observable universe, leading him to ask, ""Where is everybody?""