• 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
How Was the Solar System Formed?
How Was the Solar System Formed?

... Gas and dust were swept along. Eventually, the gas giant planets were formed. They include Jupiter, Saturn, Uranus, and Neptune. Farther out in space, there was not as much matter. There were not as many collisions. Objects that were formed were smaller than the planets. The Oort Cloud and the Kuipe ...
Our Solar System - s3.amazonaws.com
Our Solar System - s3.amazonaws.com

...  Made of materials that resist vaporization  Most of the gaseous material and “smaller stuff” consumed by the sun, hence fewer satellites. ...
Solar_Systems_Test_Face
Solar_Systems_Test_Face

... Saturn is the largest planet in the solar system. Venus’s surface is hotter than Mercury’s, despite being twice as far from the Sun. Uranus has a moon named Titan. Apollo 11 landed on Mars. Jupiter rotates faster than any other planet in the solar system. The density of Saturn is lower than any othe ...
50 FACTS about SPACE
50 FACTS about SPACE

... 1. What is a collection of hundreds of billions of stars that are held together by gravity? __________________. 2. The term that refers to everything that physically exists, including all forms of energy is called the _________________. 3. What is the study of the universe called? __________________ ...
File
File

... Match the following Definitions  ...
exoplanets
exoplanets

... •Planets as small as Earth and smaller •Observational bias favors finding large planets •Often find planets very close to star •Observational bias •Gas giants can live very near their stars •Orbits often highly eccentric ...
How Was the Solar System Formed? Questions
How Was the Solar System Formed? Questions

... along. Eventually, the gas giant planets were formed. They include Jupiter, Saturn, Uranus, and Neptune. Farther out in space, there was not as much matter. There were not as many collisions. Objects that were formed were smaller than the planets. The Oort Cloud and the Kuiper Belt are in this regio ...
Early Observers (The Beginnings of Astronomy)
Early Observers (The Beginnings of Astronomy)

... What is a year? What they saw  The time it takes for a group of stars (constellation) to return to the same part of the sky at a certain time of day What we know:  Time required for the Earth to revolve around the sun. ...
Exoplanets. I
Exoplanets. I

... How did we find the planets? •  Mercury, Venus, Mars, Jupiter, Saturn: orbital motion •  Uranus: chance imaging (see by Galileo) •  Neptune: predicted from gravitational perturbations; imaging •  Pluto: orbital motion (guided by erroneous prediction) •  Ceres, Vesta, Pallas, Juno: orbital motions • ...
1. Which of the following statements does not describe Jupiter? A. It
1. Which of the following statements does not describe Jupiter? A. It

... B. It has volcanoes. C. It has a very large magnetic field. D. It is the only satellite with rings around it. 7. The rings of Saturn are probably made of A. hot gas bound to the planet by gravity and inside Roche's limit. B. chunks of rock many miles in diameter captured from the asteroid belt. ...
SNC1P - MsKhan
SNC1P - MsKhan

... (with no binoculars or telescopes) -moons = smaller celestial objects orbiting around ________________ -moons are also visible because they reflect the light of the Sun -Earth has 1 moon, Jupiter and Saturn have more than 60 moons each -galaxies = huge, rotating collections of gas, dust, stars, plan ...
Astronomy Unit Notes - sciencepowerpoint.com
Astronomy Unit Notes - sciencepowerpoint.com

... Name:___________________ ...
The Inner Planets - Library Video Company
The Inner Planets - Library Video Company

... In fact, the first star we see at night isn’t a star, but rather the planet Venus. Venus is the closest planet to Earth, and is very bright due to its clouds being lit by the Sun. Due to the greenhouse effect, its toxic atmosphere is not breathable and it is stiflingly hot! Is Mars similar to Earth? ...
Our Solar System
Our Solar System

... a dirty snowball • Comets come from faraway regions of our solar system beyond the planets ...
Our Solar System Formation
Our Solar System Formation

... planets. Where gas giants are formed there is rocky solid material and much more gas. The rocky material first accretes solid material to become planetesimals and then with its gravity it will collect the gasses around making them a giant like Jupiter. At the beginning of our solar system there wher ...
Astronomy 1 – Winter 2011
Astronomy 1 – Winter 2011

... - Low temperatures (far from sun) - Massive, strong gravity, can hold H, He ...
6.8 Part III The Solar System
6.8 Part III The Solar System

... Earth, is one of the small, rocky planets in our solar system and is the third planet from the sun. Scientific evidence indicates that the Earth is about 4.5 billion years old. It is made up of active layers of rock and is covered by large areas of land called continents and large bodies of liquid w ...
1. Pre and Post test 2. Schedule of the orbits of the planets in our solar
1. Pre and Post test 2. Schedule of the orbits of the planets in our solar

... Pre-Post Test 1. How many planets have been discovered? a) more than 8 b) more than 12 ...
Comparing Earth, Sun and Jupiter
Comparing Earth, Sun and Jupiter

... Rilles found all over moon’s surface: may be evidence of liquid lava flow at earlier time Mars Red surface, due to high iron content Polar caps clearly visible: indicate water content  Change with seasons Atmosphere very thin and dry; planet is too small to hold on to an atmosphere Surface now well ...
A. Comet: dust and rock particles combined with frozen water
A. Comet: dust and rock particles combined with frozen water

... The Solar System Section I The Solar System Age of our solar system is 4.6 billion years old. The solar system is made up of 8 planets since Pluto has been denoted to and many smaller objects that orbit the sun. ...
etlife_exoplanets - University of Glasgow
etlife_exoplanets - University of Glasgow

... Extra-terrestrial life: Is there anybody out there?… Prof Martin Hendry University of Glasgow ...
Space - PAMS-Doyle
Space - PAMS-Doyle

... • Dwarf planets are round and orbit the Sun just like the eight major planets. A dwarf planet is much smaller than a planet (smaller even than Earth's moon), but it is not a moon. Pluto is the best known of the dwarf planets ...
Assignment #1
Assignment #1

... 2. What do the inner planets have in common with each other in terms of size, location, and composition? 3. What do the outer giant planets have in common with each other? ...
A Solar System is Born 4/29/11
A Solar System is Born 4/29/11

... • Hubble image of protoplanetary discs in the Orion Nebula, a light-years-wide "stellar nursery" probably very similar to the primordial nebula from which our Sun formed. ...
Solar system
Solar system

... because of its large size. It was estimated to be 25 miles long in diameter. People think that it was the most viewed comet in history because of its huge size and brightness. ...
< 1 ... 292 293 294 295 296 297 298 299 300 ... 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