• 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
6TH GRADE ACCURATE PLANET SIZES AND DISTANCE FROM
6TH GRADE ACCURATE PLANET SIZES AND DISTANCE FROM

... stand for Pluto). The first four planets; Mercury, Venus, Earth, and Mars, are the terrestrial planets. These planets are made of rock and are close to the Sun, relatively small, and similarly sized. The next four planets; Jupiter, Saturn, Uranus, and Neptune, are the gas planets. These planets are ...
Summary of the Presentation
Summary of the Presentation

Powerpoint - u.arizona.edu
Powerpoint - u.arizona.edu

... and farthest planet from the sun. (Sometimes it passes in front of Neptune, then it is the 8th planet.) • Pluto is the smallest planet. • Pluto is a small, cold, rocky planet. • Pluto has one moon. • Pluto seems to be lying on its side. • Pluto is so far away, that we do not know much about it. ...
The Solar System
The Solar System

... has so little atmosphere. That’s one heck of an impact event. ...
8.4 Scale Diagram of the Solar System
8.4 Scale Diagram of the Solar System

... Diameter (km) ...
Question 1 (7-5 thru 7-7 PPT Questions)
Question 1 (7-5 thru 7-7 PPT Questions)

... 6. When a stellar occultation occurs (i.e., one celestial object passes in front of another), the total amount of light received decreases. During a transit (when a planet passes in front of its star), the star will dim. Such dimming can confirm the existence of an exoplanet or lead to an exoplanet ...
Lecture13
Lecture13

... material, collisions can only occur if orbits change from being nearly circular to being more eccentric  This can occur as the collisions get larger and more violent.  This is the final step in the formation of terrestrial planets. Some of the final impacts were quite large:  Such an impact may h ...
Astronomy Snakes and Ladders Earth, third planet in Solar System
Astronomy Snakes and Ladders Earth, third planet in Solar System

... Spiral Galaxy consist of many stars from different class ...
206a StarFold Lab Instructions
206a StarFold Lab Instructions

... o White Dwarf o Supernova o Black Hole ...
The Solar System
The Solar System

... the clouds reaches the surface. • Much of the heat is absorbed by carbon dioxide in the atmosphere. • Water vapor and later carbon dioxide in the atmosphere created a greenhouse and made the planet very hot (475ºC). ...
Solar System Bead Distance Primary Audience
Solar System Bead Distance Primary Audience

... o Planet Beads: ƒ Sun (yellow) ƒ Mercury (red) ƒ Venus (cream) ƒ Earth (blue) ƒ Mars (red) ƒ Asteroid (black) ƒ Jupiter (orange) ƒ Saturn (gold) ƒ Uranus (blue) ƒ Neptune (blue) ƒ Pluto (brown) o 4.5 Meters of String o Meter Sticks or Measuring Device Instructions: Our Solar System is immense in siz ...
Document
Document

... What is the main reason that many scientists think Mars may have once harbored life? What is the most likely origin of the two moons of Mars? ...
class04
class04

... “lap” another planet (or when Mercury or Venus lap us).  But very difficult to explain if you think that Earth is the center of the universe!  In fact, ancients considered but rejected the correct explanation… ...
moon
moon

... What moon phase do you see When the line up is Sun moon- Earth? ...
Name: :___________Period - East Hanover Township School District
Name: :___________Period - East Hanover Township School District

... Uranus: Uranus is a gas giant planet, orbiting at 19.2 AU from earth. It is unusual in that it rolls along its orbit rather than spins. Neptune: Neptune is another blue gas giant planet, 30.1 AU from the sun. It is about 3.9 times the diameter of the earth. ...
Document
Document

History of Astronomy
History of Astronomy

... 1. The stationary Earth is at the center of the universe. 2. The planets and other celestial bodies travel in perfect circles around it. 3. The heavens are made of a perfect, unchanging substance different from substances on Earth. ...
Rocket Science
Rocket Science

... Since the velocity of a satellite on the surface of a planet is vo… …then the velocity needed to launch a rocket into orbit of radius r; altitude of r-rp is v2 = vo2 + vL2 vL2 = v2 - vo2 ...
GSC 1580 Vocabulary/Who`s Who
GSC 1580 Vocabulary/Who`s Who

... proposed the heliocentric system, that the stars are stationary, and that heavenly bodies move in perfect circles and at constant speeds. Coriolis force: an apparent force that as a result of the Earth's rotation deflects moving objects (as projectiles or air currents) to the right in the northern h ...
Fig. 16-7, p.363
Fig. 16-7, p.363

... from a disk around the Sun as it formed; such protoplanetary disks are seen around many young stars • Planets like Earth are believed therefore to form as normal byproducts of stars forming • There are two types of planets in our solar system, Earth-like and Jupiter-like, results of a process we thi ...
1ºESO SCIENCE: 9th October, 2007
1ºESO SCIENCE: 9th October, 2007

... 8. The change of seasons along the year is caused by revolution and also by the slant of….. (the axis or the Earth axis). 9. It is a group formed by the Sun, the planets and other bodies. It is... (the Solar System). ...
Do you want to make a scale model of the solar system where both
Do you want to make a scale model of the solar system where both

... 1. Use the planet cut outs you made from part 1 of this activity. 2. Label the circles Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. 3. Position yourself as the Sun. 4. Give each of your friends a cut-out planet to hold. 5. Have your classmates position themselves the follow ...
File eschpt20 - My Teacher Pages
File eschpt20 - My Teacher Pages

... Section 20-1 – Observing the Solar System • Geocentric System: Ptolemy developed the Geocentric Theory that the Earth is at the center of the revolving planets. • Heliocentric System: Later, during the 1500’s, Nicolaus Copernicus developed a new model, the Heliocentric System, which is the Earth an ...
Pythagoras Eudoxus of Cnidus Aristotle Eratosthenes Hipparchus
Pythagoras Eudoxus of Cnidus Aristotle Eratosthenes Hipparchus

... agreed with Ptolemy that the planets have epicycles, spinning in smaller orbits as they make the larger revolution. However, Copernicus introduced the idea that the earth and planets revolve around the sun. This new idea became known as the heliocentric (sun centered) theory. ...
An earthllke planet would have a rocky mantle surround
An earthllke planet would have a rocky mantle surround

... on the Limits of Organic Life in Planetary ...
< 1 ... 241 242 243 244 245 246 247 248 249 ... 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