• 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
Solar System Review
Solar System Review

History of astronomy - Part I.
History of astronomy - Part I.

... center of all the Sun resides. For who would place this lamp in another or better place within this most beautiful temple, than where it can illuminate the whole at once? Even so, not inaptly, some have called it the light, mind, or ruler of the universe. Thus indeed, as though seated on a throne, t ...
The Big Bang Demonstration
The Big Bang Demonstration

... In a similar way, the theory is that at the center of this spinning cloud, a small star began to form. This star grew larger and larger as it collected more and more of the dust and gas that collapsed into it. Further away from the center of this mass where the star was forming, there were smaller c ...
File - 5th Grade Science Almost done!!!!!!!!!
File - 5th Grade Science Almost done!!!!!!!!!

... of Saturn's auroras. They show tall auroral curtains, rapidly changing over time when viewed at the limb, or edge, of the planet's northern hemisphere. The sequence of images also reveals that Saturn's auroral curtains reach heights of more than 1,200 km (746 mi) above the planet's limb. These are t ...
Solar System PPT
Solar System PPT

... Way, which is among billions of galaxies that make up the universe ...
Announcements
Announcements

... What produced the organized motions? • Planets formed as part of the formation of the Sun. • Begin with region of higher density composed of H & He + traces of heavier elements in the space between the stars ...
Chapter 2 - Cameron University
Chapter 2 - Cameron University

... • Through the use of models and observations, they were the first to use a careful and systematic manner to explain the workings of the heavens • Limited to naked-eye observations, their idea of using logic and mathematics as tools for investigating nature is still with us today • Their investigativ ...
Skymapper and Kepler K2: Finding the Origin of Hot Gas Giants
Skymapper and Kepler K2: Finding the Origin of Hot Gas Giants

... determine which stars are young. • Data/pretty images prior to May 1 would really help the proposal for K2 targets! • This is standard “fast” survey data. ...
Class 1: From Astrology to Astronomy
Class 1: From Astrology to Astronomy

... number of sphere’s. • On the outermost sphere were the stars. • Inner spheres contained the sun, moon and planets. ...
Chapter 2
Chapter 2

... • Through the use of models and observations, they were the first to use a careful and systematic manner to explain the workings of the heavens • Limited to naked-eye observations, their idea of using logic and mathematics as tools for investigating nature is still with us today • Their investigativ ...
The Solar System (Ch. 6 in text) The solar system consists of the Sun
The Solar System (Ch. 6 in text) The solar system consists of the Sun

... “accumulation” of planetesimals into planets (note that this is sometimes called “accretion” in your text). Either get terrestrial-like planets (if close to the star, where it’s too warm for “volatiles” to be solid or liquid) or Jovian-type planets (further from star, where cooler, so “accretion” of ...
AST301.Ch6.15.SolarSystems - University of Texas Astronomy
AST301.Ch6.15.SolarSystems - University of Texas Astronomy

... “accumulation” of planetesimals into planets (note that this is sometimes called “accretion” in your text). Either get terrestrial-like planets (if close to the star, where it’s too warm for “volatiles” to be solid or liquid) or Jovian-type planets (further from star, where cooler, so “accretion” of ...
Solar System
Solar System

... Probably the most famous of the Kuiper Belt Objects (KBOs) is Pluto, once considered a planet. Pluto was discovered by American astronomer Clyde Tombaugh in 1930, while working at Lowell Observatory in Flagstaff, AZ. The founder of the observatory, Percival Lowell had theorized that a planet beyond ...
Astronomy - SchoolNotes
Astronomy - SchoolNotes

... rocky bodies orbiting the sun in the same direction as the planets. ...
4th Grade Science Study Guide 2010
4th Grade Science Study Guide 2010

... Planets (In order from distance from the sun.) Mercury- Smallest planet. Mercury is extremely hot on the side facing the sun and extremely cold on the side that is away from the sun. Venus- Venus is similar to the size of Earth. Venus has acid clouds that trap the sun’s heat, which makes it very hot ...
The Solar System Characteristics.notebook
The Solar System Characteristics.notebook

... gravitaonal pull  greater than anything else in the universe. • It's "great red spot" is three mes the  size of Earth o This spot is a huge storm • Jupiter has the shortest day of any of the planets, turning  once on  its axis every 10 hours  ...
First GROUP BY - WordPress.com
First GROUP BY - WordPress.com

... and astrology were historically associated, but astrology is not a science and is no longer recognized as having anything to do with astronomy. ...
Planet/Dwarf Planet and Moon Assignments
Planet/Dwarf Planet and Moon Assignments

... You will be drawing the orbits of your assigned planet or dwarf planet on the large poster. In addition, you will also draw the orbit of a second planet to give the reader a sense of scale of the solar system. Feel free to draw additional inner planet orbits if you like. 1. Look at the table of plan ...
Name Date____________________ Block_________ Astronomy
Name Date____________________ Block_________ Astronomy

... 1. Seasons are due to: a. Tilt of the earth b. Gravity pull of the Moon c. The Earth’s Elliptical Orbit d. Parallax 2. During which phase of the moon, will we experience Spring tides: a. 1st quarter b. Waxing crescent c. Waning gibbous d. New Moon 3. The model of the solar system with the Sun at the ...
Scale Model of the Solar System
Scale Model of the Solar System

... Object Sun Mercury Venus Earth Mars Asteroid belt Jupiter Saturn Uranus Neptune Pluto Proxima Centauri The Moon ...
Old Sample Exam #2
Old Sample Exam #2

Lecture (Powerpoint)
Lecture (Powerpoint)

Chapter 19 The Solar System
Chapter 19 The Solar System

... A1) Yes all objects are acting on each other Q2) Why do astronauts have a feeling of weightlessness if there is gravity in space? A2) They are in free-fall with earth’s gravity pulling on them, but their forward motion along their orbit keeps them from getting closer to earth. * ...
Solar System
Solar System

... The planets in our solar system are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto ...
Solar System Data Sheet
Solar System Data Sheet

... Sometimes called “dirty snowballs” or “icy mudballs.” ...
< 1 ... 237 238 239 240 241 242 243 244 245 ... 338 >

Definition of planet



The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report