• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
ISP 205: Visions of the Universe Fall 2001 Professor: ER Capriotti
ISP 205: Visions of the Universe Fall 2001 Professor: ER Capriotti

... B. fewer electrons than protons. C. a different number of electrons than protons. D. more electrons than protons. 39. The wavelength at which the maximum energy is radiated from a black body is A. inversely proportional to temperature. B. directly proportional to temperature. C. independent of the t ...
Chapter 20
Chapter 20

... form complex molecules, primitive life may well have arisen not only on the Earth but also in other locations. The appearance of very simple organisms in Earth rocks that are 3.5 billion years old, and indirect evidence for life as far back as 3.8 billion years (not long after the end of the bombard ...
physics_cosmic_engine - HSC Guru
physics_cosmic_engine - HSC Guru

Unit 8 Chapter 26 Studying Space
Unit 8 Chapter 26 Studying Space

... Because the year is not exactly 365 days long, over centuries, the calendar gradually became misaligned with the seasons. In the late 1500s, Pope Gregory XIII formed a committee to create a calendar that would keep the calendar aligned with the seasons. We use this calendar today. In this Gregorian ...
Life in the galactic danger zone
Life in the galactic danger zone

... Habitable Zone and the Age Distribution of Complex Life in the Milky Way published in the journal Science. “The massive planets could not have formed so close to their host stars so they must have migrated [or been scattered] into smaller orbits. When this happens, it is likely that they would destr ...
life
life

... •We are also damaging our environment •We are using up non-renewable resources •Civilizations may “mature” – some evidence •Sustainable civilizations is technically possible ...
Life Cycles of Stars
Life Cycles of Stars

Quentin Parker Lecture 1b - PowerPoint file.
Quentin Parker Lecture 1b - PowerPoint file.

... any image dance and blur in an effect we refer to as `seeing’ Rarely if ever is the inherent diffraction limit of a large telescope reached regardless of atmospheric stability though obviously the higher the observatory is situated the less atmosphere there is to contend with. Note also that the fin ...
Unit 1: The Big Picture
Unit 1: The Big Picture

... Elliptical Galaxies Sphere or squashed sphere shape with nucleus and halo No spiral arms, little dust or gas Made almost entirely of old reddish stars Stars orbit, but not all in the same path…don’t rotate Range in size from giant to dwarf Dwarf is the most common type of galaxy ...
Navigation Methods
Navigation Methods

... longitude readout position to marine, aero and land receivers. ...
localhost
localhost

... Venus’s close orbit around the sun caused its climate to be slightly hotter than that of Earth, which prohibited the formation of oceans. Without these oceans, the atmosphere of Venus remained thick with CO2, giving the planet its signature runaway greenhouse effect. The heating due to the greenhous ...
Study Guide: Use your notes and handouts to answer the following
Study Guide: Use your notes and handouts to answer the following

... Neptune (further from Sun than other planets) 3. What are significant characteristics of each planet in our solar system? Mercury is the closest planet to the Sun. Mercury is smallest of current planets. It is covered with craters. Venus, the second planet away from the Sun, is Earth’s closest neigh ...
The Science of Life in the Universe (Chap 2
The Science of Life in the Universe (Chap 2

The Science of Life in the Universe (Chap 2
The Science of Life in the Universe (Chap 2

... the statement given makes sense, since we need heavier stars to make the chemical elements upon which our lives are based. In fact, only the most massive stars, greater than about 10 solar masses, will ever form the chemical elements of iron and those more massive than iron, up to and including uran ...
Study Guide for 1ST Astronomy Exam
Study Guide for 1ST Astronomy Exam

...  Using a ratio determine how much larger one object is compared to another given their diameters,  Convert AU into kilometers and kilometers into AU. Unit 2: Beyond the Solar System  Define a galaxy giving a representative diameter,  List the hierarchical structures of the universe in order of i ...
Mid-term Exam 3 - Practice Version
Mid-term Exam 3 - Practice Version

... They formed from the atmosphere of the Sun. They migrated inward after forming far from the Sun in the outer Solar System. They formed inside the radius at which ice mantles could not exist on dust grains. Ice grains are limited to highly eccentric and highly inclined orbits. Dust grains only exist ...
Brock physics - Brock University
Brock physics - Brock University

... 6. Aristarchus argued that the Sun must be the centre of the solar system because (a) he reasoned that the Sun is much larger than the Earth, and so it made sense that the larger object should be at the centre. (b) careful observations showed that the Sun does not move, but the Earth does move. (c) ...
earthmoonsunnotes-120923124709-phpapp02
earthmoonsunnotes-120923124709-phpapp02

... a. Tidal bulging: The stretching of the Earth along the earth-moon line. - This effect happens whenever one body moves around another body in space. - This happens because the earth is STRECHED by the gravity of the moon, not because the moon is pulling the anything towards it. - On earth this is no ...
Stars - Images
Stars - Images

... Gravity squeezes the clumps of gas and dust together with so much friction/pressure that it caused them to begin to glow and get hot. Sizes can vary ...
The Hubble Deep Field (HDF)
The Hubble Deep Field (HDF)

The Hubble Deep Field (HDF)
The Hubble Deep Field (HDF)

Chapter 26 Review - geraldinescience
Chapter 26 Review - geraldinescience

... 5 Which of the following is evidence of Earth's revolution? A B C D ...
Ch 8.3 - The Solar System
Ch 8.3 - The Solar System

... Measuring Distances in the Solar System Astronomical Units: approximately 150 million kilometers; the average distance from Earth to the Sun. - The Astronomical Unit (AU) is equal to 1.5 x 108 km. - The Astronomical unit is equal to the distance from the Sun to Earth. All other planets are compared ...
History_of_Astronomy
History_of_Astronomy

... noon, the Sun cast no shadow in Syene, but in Alexandria a shadow was visible. Using a gnomon (a vertical stick), Eratosthenes measured the shadow's angle to be about one-fiftieth of a circle. Calculated earth radius at 4212 miles vs the 3963 Calculated moon radius at 1478 vs. 1080 miles ...
Venus Investigation
Venus Investigation

< 1 ... 248 249 250 251 252 253 254 255 256 ... 373 >

Rare Earth hypothesis



In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report