• 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
Astronomy Review - Cockeysville Middle
Astronomy Review - Cockeysville Middle

... There is no pattern of rotational periods (Day Length). The outer planets all have rings and multiple moons. ...
33_drake
33_drake

What is a Solar System?
What is a Solar System?

... All planets orbit the sun in almost-circular elliptical orbits on approximately the same plane (the ecliptic). Dwarf Planets, comets, asteroids, and meteoroids also orbit the sun Most Satellites/Moons orbit planets (some orbit dwarf planets or even asteroids) Almost all planets, dwarf planets, and m ...
The wonders of our universe
The wonders of our universe

... The Earth is part of our solar system. At the centre of this is the sun, which is the solar system’s star. Our solar system consists of the sun and objects connected to it by gravity – eight planets and some moons. The four smaller planets, Mercury, Venus, Earth, and Mars, are made of rock and metal ...
Name: Orbits and Escape Velocity – Practice 1. A concrete block of
Name: Orbits and Escape Velocity – Practice 1. A concrete block of

... 2. Miniature Black Holes: Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 1.0 × 1011 kg (and a radius of only 1.0 × 10-16 m) reached Earth, at what distance from your head would its gravitational pull on you match ...
Revolving and Rotating
Revolving and Rotating

... Revolving and Rotating Our Solar System is made up of one star, planets, moons, asteroids and comets. We used to have nine planets but now we only have eight. Most diagrams still show Pluto. Pluto doesn't fit with the definition of a planet – it is too small. One part of the definition of a planet i ...
How much do we make
How much do we make

Habitable Zone - Wando High School
Habitable Zone - Wando High School

The Solar System
The Solar System

The Solar System - Teachers TryScience
The Solar System - Teachers TryScience

... causes sunlight for 42 years at a time ...
Science Standards - Explore-It
Science Standards - Explore-It

... and stars across the sky depend on the rotation of the Earth on its axis 6.3.8 Recognize and describe the sun as a midsize star located near the edge of a disk-shaped galaxy of stars called the Milky Way. Recognize that the universe contains many billions of galaxies, and each galaxy contains many b ...
Ezequiel Zurita,Issi Sanchez Ruth Villa and Kiarah
Ezequiel Zurita,Issi Sanchez Ruth Villa and Kiarah

... of almost 18 miles(50 km) per second. • The Earth weigh’s about 6 trillion tons • The Earths first picture of the worlds weather from space was taken in 1960 by the trios 1 ...
Picture Match Words Giant Planet Phase Habitable Zone Fluctuate
Picture Match Words Giant Planet Phase Habitable Zone Fluctuate

... A ___________________is established by different types of stars; this zone allows acceptable temperatures for liquid water to exist. ...
S NOTES Astronomy
S NOTES Astronomy

... 1) They are located mainly in the Asteroid belt, between _________________ and Jupiter. a) 66 million years ago an asteroid _____________________ could have been responsible for why the dinosaurs became extinct. Evidence of the impact is a thin layer of Iridium dust that covers the Earth geologic re ...
GLY 1001 Answers to Chapter 21 Review Questions
GLY 1001 Answers to Chapter 21 Review Questions

... 10. (Diagrams will vary) Venus will be full when it is on the opposite side of the Sun from Earth, a configuration that could not happen in the Ptolemaic system. 11. The orbits of the planets are the result of gravitation and inertia. (Inertia is the tendency of a moving body to travel in a straight ...
The Solar System
The Solar System

... causes sunlight for 42 years at a time ...
Earth Patterns, Cycles & Changes SOL 4.7
Earth Patterns, Cycles & Changes SOL 4.7

... The sun is approximately 4.6 billion years old.” Does not move its location 869,959 miles around (diameter) ...
Objects Beyond Neptune
Objects Beyond Neptune

... • A region of the solar system that starts just beyond the orbit of Neptune and that contains dwarf planets and other small bodies made mostly of ice • Looks like a doughnut-shaped ring just beyond the orbit of Neptune • Short period comets originate in the Kuiper Belt • There may be hundreds of tho ...
Summary of the Presentation
Summary of the Presentation

... Of the stars examined for planets, planets have been found around only ~12%. As the ability to detect small planets improves, a larger percent of stars should be found to have planets. It is estimated that this will top out to about 50% and that only 25% of these will have planets of suitable size ( ...
Earth Science - Montville.net
Earth Science - Montville.net

... 5. Pretend you are a reporter for a newspaper, write an article for your paper. Use a catchy headline; add interesting details from your research. Share stories with the class. 6. Make up a guessing game. Read clues about “your’” planet and see if others can guess the name of the planet. 7. Using di ...
Lecture5
Lecture5

Section 26.1 - CPO Science
Section 26.1 - CPO Science

... made two discoveries. ...
The Solar System
The Solar System

... causes sunlight for 42 years at a time ...
The Sky
The Sky

... • The stars are scattered randomly on this sphere (except for the Milky Way). • In this randomness, we see pictures: Constellations. ...
Formation of the Solar System The Solar System
Formation of the Solar System The Solar System

... • Theory that best explains properties of Earth and Moon is “giant impact” between early Earth and a Mars-sized object in a similar orbit. ...
< 1 ... 328 329 330 331 332 333 334 335 336 ... 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