• 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
ExoplanetWorksheet
ExoplanetWorksheet

... * There is a theoretical distance (Semi-major axis) from each star called the “habitable zone” where an exoplanet would have to orbit in order to support life as we know it (due to temperature). As a general rule, the “habitable zone” for more massive stars is further away than for less massive star ...
the Powerpoint
the Powerpoint

... Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky. Nearly 4.5 billion kilometers from the Sun, Neptune orbits the Sun once every 165 years. It is invisible to the naked eye because of its extreme distance from Earth. It is a lit ...
Name
Name

... The spinning of the Earth, known as the Earth’s rotation, is what controls the length of day and night. The Earth rotates on its axis, an imaginary line through Earth that goes from the North Pole to the South Pole. As the Earth rotates only part of the Earth’s surface faces the sun at a time. This ...
Slide 1 - MrMrsCase
Slide 1 - MrMrsCase

... the solid inner planets and the outer planets which are gas planets. They do not line up as shown in the picture below. It is possible for them to roughly line up once in millions of years. ...
Our Solar System
Our Solar System

... Mars is the second planet in our solar system that has water. Mars is the 4th planet from the sun. Mars is right next to our Earth. Mars is a very dry and dusty planet. Mars’s crust is made of rock and dirt. It takes 24 hours and 37 minutes to rotate once. A trip to mars from earth takes about 6 mon ...
Third Nine Weeks Review – Sky Patterns
Third Nine Weeks Review – Sky Patterns

...  Revolution – Earth orbits or revolves around the sun in one year (365 days)  Seasons of the year are caused by the tilt of the Earth on its axis and the revolution of Earth around the Sun. As Earth revolves around the sun, different parts of the Earth get more direct sunlight.  When a hemisphere ...
JUPITER AND URANUS
JUPITER AND URANUS

... because it rotates really fast. One year is 84 Earth years because it takes a long time to go around the sun. Uranus ...
"It`s increasingly seeming that the solar system is
"It`s increasingly seeming that the solar system is

... orbit at large angles compared to the rotational axis of its star. A few systems even orbit two stars at once, getting Star Wars fans excited about a real-life Tatooine planet with two suns. ...
The Planets
The Planets

Vocabulary Planet Characteristics The Solar System 20 20 20 40 40
Vocabulary Planet Characteristics The Solar System 20 20 20 40 40

... What is a satellite? ...
Do not write on this copy write answers on answer sheet Earth, Solar
Do not write on this copy write answers on answer sheet Earth, Solar

... 12 ( 1c). How does the nebular theory describe the formation of the solar system? A. A star exploded and created the individual planets we have today. B. A cloud of spinning dust and gas condensed into the sun and planets C. A giant asteroid collision broke off parts that became the planets and sun ...
star
star

... large that the unit used to measure distance is a light-year Light-year – the distance light will travel in a vacuum in one year  1light-year = 9,460,730,472,580.8 km (9.5x1012km) or 5,878,625,373,183.608 miles ...
The Structure of Comets - Oregon State University
The Structure of Comets - Oregon State University

... The Asteroid Belt • Using Bode’s Rule (a simple mathematical formula that seemed to predict where planets would be found), the asteroid Ceres was discovered between the orbits of Jupiter and Mars. • Soon many more small bodies were discovered. • Now we know of 21,785 asteroids, located in the aster ...
November Puppy Dog New Notes
November Puppy Dog New Notes

... preceded them in history. We began with a simple story. We imagined a time before people, animals, plants, a time before, earth, a time when there was nothing at all. Then out of the quiet, black darkness came a great big bang and out of this big bang swirled gas and dust. As the gases clumped toget ...
Three Media Reports by Carole Gallagher
Three Media Reports by Carole Gallagher

... conditions and to avoid collisions with other moons and planets in its solar system. Pluto was the last planet to be discovered in our solar system by Clyde Tombaugh in 1930. However, even when using improved telescopes, Pluto appears as a faint object 10,000 times dimmer than the faintest star in t ...
Name: Category: 30 points 20 points 10 points 0 points Accurate
Name: Category: 30 points 20 points 10 points 0 points Accurate

... appearance. ((E.g., Venus is not a blue planet, and if rings are visible around the correct planet.) ...
Planets - Cardinal Hayes High School
Planets - Cardinal Hayes High School

... • Planets – bodies that are partly solid or gaseous that orbit around the sun and are seen by reflected sunlight • Satellite – solid bodies that orbits planets (moons) ...
Minor Objects in the Solar System
Minor Objects in the Solar System

... o The asteroid belt was created when the Solar System was created o Jupiter’s gravity prevented a bunch of rocks from getting together to form a planet which is now the asteroid belt o There are some asteroids that are freely floating in space o An asteroid hitting the Earth would cause an extinctio ...
The Scientific Revolution - Online
The Scientific Revolution - Online

... challenged Aristotle's universe and its theological-philosophical worldview,34and laid the foundations for dynamics (how objects move on the earth) and gravity. ...
Moons On Other Planets
Moons On Other Planets

... Neptune ...
Astronomical Units and Light Years #2
Astronomical Units and Light Years #2

... one. There are too many stars for us to even begin to count. See how many you can count while gazing up at the sky on a clear night. Not only are there too many stars to count but, the stars are beyond our imagination as to how far away they are. They are so far away that standard units of measureme ...
Solar System PPT
Solar System PPT

... Way, which is among billions of galaxies that make up the universe ...
A105 Stars and Galaxies
A105 Stars and Galaxies

... NOT TO SCALE!!! ...
From Big bang to lives on planets
From Big bang to lives on planets

Kepler`s Laws Worksheet
Kepler`s Laws Worksheet

...  Circles have centers. Ellipses are like flattened circles, that don’t have a center, but rather have two ___________.  Eccentricity may be interpreted as a measure of how much an orbit’s shape deviates from a circle. For a circle, e = 0 For an ellipse, 0 < e < 1 ...
< 1 ... 233 234 235 236 237 238 239 240 241 ... 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