• 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
Lecture 3 Ptolemy to Galileo
Lecture 3 Ptolemy to Galileo

... Aristotle & Ptolemy said the Moon is a perfect, smooth sphere. In fact, the Moon is no more “perfect” than the Earth. ...
Celestial Objects
Celestial Objects

... There are over 100 billion stars in a galaxy and there are over 100 billion galaxies.  Classified by shape: elliptical, irregular , spiral ...
Gravity
Gravity

... • Gravity lecture and applications • Workshop: moons of Jupiter break • Minilecture by Geoff and Jonathan • Friday: workshop report on Moon • Friday: take Quiz 3 ...
Rotation and Revolution
Rotation and Revolution

... Rotation and Revolution A planet is a large body that shines by reflected light and travels in a stable path around a star. The sun is the star of our solar system and controls the motion of all the planets that travel around it. The planets are illuminated, or lit up, by sunlight. Some planets may ...
PHYS 390 Lecture 6 - A tour of the planets 6 - 1 Lecture 6
PHYS 390 Lecture 6 - A tour of the planets 6 - 1 Lecture 6

... AU, astonishingly small. The mass distribution is (2008 data from http://exoplanet.eu) 0 - 2 Jupiter masses: 63% 2 - 4 Jupiter masses: 17% 4 - 6 Jupiter masses: 7% Issues: • The conventional model of our solar system argues that the terrestrial planets must lose their gaseous atmospheres - Jupiter-l ...
Article - Iowa State University
Article - Iowa State University

... Belt object more distant and larger than Pluto. It was at that point, that the questions regarding Pluto’s status began to grow even more. The gist of the IAU’s new definition of a planet says that it must be nearly round, orbit a star and dominate its portion of space. ...
13. Two World Views. I. The Ptolemaic System
13. Two World Views. I. The Ptolemaic System

... the movement of both. Or if they should be carried around as if one with the air, neither the one nor the other would appear as outstripping or being outstripped by the other. But these bodies would always remain in the same relative position... And yet we shall clearly see all such things taking pl ...
Planet Walk Activity
Planet Walk Activity

... 1) Measure the distance from the “Sun” to the #4 position of Mars, Jupiter, and Saturn. Plot and label their positions on the grid. (Each floor tile is 1 foot by 1 foot) 2) Plot and label the #2 and #6 positions of Earth on the grid, as well. 3) Draw lines from the #2 position of Earth through each ...
STREAMing THE SOLAR SYSTEM with Third Grade
STREAMing THE SOLAR SYSTEM with Third Grade

... The students were very excited about this lessons. They were astounded by the distance between each planet, especially the outer planets. ...
New Stars, New Planets?
New Stars, New Planets?

... poses additional challenges for astronomers. First of all, theorists have long assumed that planets spontaneously coalesce from a protoplanet disk of material surrounding a star. In such models it is doubtful that such a large planet could ever form so close to a star. Secondly, sun-like stars such ...
Solar System Review
Solar System Review

... b. They are warmer and smaller than the other planets. c. They are made of solid, rock-like materials. d. All of the above ...
Chapter105.ppt
Chapter105.ppt

... “bent”, an effect called gravitational lensing. ...
Astronomy Book Test Study Guide
Astronomy Book Test Study Guide

... Explain what causes the seasons. _____  You will need to include more detail than just “tilt of Earth’s axis”  Rotation does not have to do with seasons  Distance does not have to do with seasons  The angle of sunlight changes throughout the year because the tilt of the Earth relative to the Sun  ch ...
Grade 3 Social Studies
Grade 3 Social Studies

... What is the Solar System? Our solar system is the Sun and the planets that orbit, or spin, around it. The Sun is really a star that is only about 93,000,000 miles from us. Until 2006 we had nine known planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Astronomers then ...
The Copernican Model (1543)
The Copernican Model (1543)

... The Copernican Model (1543) The Copernican Model is Heliocentric and Geodynamic Heliocentric = “Sun Centered” Geodynamic = “Earth in motion” (The Ptolemaic Cosmology was Geocentric and Geostatic.) ...
Ancient to Modern Astronomy
Ancient to Modern Astronomy

... Galileo was one of the first scientists to use experimentation to figure things out in science. He came up with the concepts behind inertia, among other things Kepler and Galileo were contemporaries and actually corresponded. ...
1. Match the following items [a] 1. when a planet seems to reverse its
1. Match the following items [a] 1. when a planet seems to reverse its

... 1. The universe is constantly expanding. 2. The surface of the Moon was heated more than that of the Earth. 3. The density of the Moon is lower than the density of Earth. a. 1 only b. 2 only *c. 2 and 3 d. 3 only ...
Astronomy Unit Test Review Sheet
Astronomy Unit Test Review Sheet

... 11. List the following types of stars from oldest to youngest: giant, supergiant, white dwarf, main sequence. Explain the temperature ranges and luminosity ranges for each (2-2). ...
Planet formation
Planet formation

... • The Gases gather around a large asteroid in space by gravity and slowly start to grow more dense. • The rock becomes the center of the planet as the gases keep surrounding it. • As the planet grows bigger, its gravitational pull increases, dragging in more gasses. • Since Gaseous planets are farth ...
Semester #1 – GeoScience Review Guide – Final Exam Scale
Semester #1 – GeoScience Review Guide – Final Exam Scale

... 1. What is a light-year? How big is it in kilometers? 2. In your scale model of the Solar System, the scale was 1 cm = 10,000,000,000 km. Jupiter is 778,000,000 km from the sun. On your scale model, how many cm was Jupiter from the sun? 3. Is this a true or false statement? 104 = 10 x 10 x 10 x 10 4 ...
wdtoc1
wdtoc1

... The Moon Telescopes have revealed a wealth of lunar detail since their invention in the 17th century, and spacecraft have contributed further knowledge since the 1950s. Earth’s Moon is now known to be a slightly egg-shaped ball composed mostly of rock and metal. It has no liquid water, virtually no ...
Astronomy and Humanism by Ray Thompson A. EARLY
Astronomy and Humanism by Ray Thompson A. EARLY

... between the length of the period of these stars and their intrinsic brightness. It is easy to measure the period of a variable star. But if this also tells you the star's intrinsic brightness, by simply comparing the intrinsic brightness with its apparent brightness you can easily calculate its dist ...
Uniqueness of the Earth, Lebo, 7-30
Uniqueness of the Earth, Lebo, 7-30

... was thrown out of planetary system) there would be no energy source. Must be a G-type star: If hotter, UV would extinguish life: If cooler, would have to be so close that tidal effects of the star on the planet would slow the planet’s rotation. ...
Astronomy – Phys 181 – Midterm Examination
Astronomy – Phys 181 – Midterm Examination

... e) one million years 7) The number of stars in a typical galaxy is closest to: (d) a) 400000 b) 40000000 c) 4000000000 d) 400000000000 e) 40000000000000 ...
Origin of Ocean
Origin of Ocean

... Milky Way Galaxy Milky Way Galaxy is 100 million light in diameter  Our galaxy contains roughly 400 billion stars  Sun is a very typical star located in one of the arms of the Milky Way Galaxy  Other planetary systems have been found in our galaxy ...
< 1 ... 329 330 331 332 333 334 335 336 337 ... 392 >

Extraterrestrial life



Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report