• 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
Uranus
Uranus

... – Herschel was an English musician and amateur astronomer – He used a 6.5” homemade reflector (it took him over 200 attempts to make it!) – Prior to its discovery, Uranus had been seen, but not recognized as a planet (it had been designated 34 Tauri) ...
The Interior Structure, Composition, and Evolution of Giant Planets
The Interior Structure, Composition, and Evolution of Giant Planets

... planetary mass of our solar system. Giant planets are also vast natural laboratories for simple materials under high pressure in regimes that are not yet accessible to experiment. With the recent rise in number and stunning diversity of giant planets, it is important to understand these planets as a ...
The Interior Structure, Composition, and Evolution of Giant Planets
The Interior Structure, Composition, and Evolution of Giant Planets

... planetary mass of our solar system. Giant planets are also vast natural laboratories for simple materials under high pressure in regimes that are not yet accessible to experiment. With the recent rise in number and stunning diversity of giant planets, it is important to understand these planets as a ...
Sample
Sample

... nodes. You can also show eclipse seasons by demonstrating the Moon’s orbit (with fixed nodes) as you walk around your model Sun. The students will see that eclipses are possible only during two periods each year. If you then add in precession of the nodes, students can see why eclipse seasons occur ...
Stars
Stars

... Life Cycle of Stars • If the remaining mass of the star is about 1.4 times that of our Sun, the core is unable to support itself and it will collapse further to become a neutron star • Neutron star = star remnant that results from collapse of a massive star after a ...
Science Olympiad 2008 Reach for the Stars Division B
Science Olympiad 2008 Reach for the Stars Division B

... 83. How many times more massive is the Sun than the Earth? A) 30,000,000x B) 300,000x C) 3,000x D) 30x 84. What is the Sun's average photosphere temperature? A) 3,000 K B) 4,600 K C) 5,800 K D) 7,400 K 85. Over the next few billion years, the Sun's luminosity will: A) increase dramatically B) increa ...
deduction of the gravity law and quantum mechanical model of
deduction of the gravity law and quantum mechanical model of

... the angular velocities as the vector, what is the most often ignored. As the result on this way were obtained the possibility to calculate planetary circular velocities, with important detail - faster decreasing of the velocity by increasing of the distance. Kepler held his attention on this detail ...
Tips on taking Astro sights
Tips on taking Astro sights

... obtained from astronomical observations is not so reliable as one obtained from terrestrial bearings. The transferred position line If two position lines are obtained at approximately the same moment, the ship's position is decided by their point of intersection. If there is an appreciable interval ...
Astro Midterm Review Part II: Ch 2
Astro Midterm Review Part II: Ch 2

... E) a fluorescent light ...
The Origin and History of the Solar System
The Origin and History of the Solar System

... us to consider the Creator and what His creation is revealing to us about Him. The Creator-God is not limited merely to the familiar things we know of on Earth. There is an amazing variety in the worlds that exist in our planet's "neighborhood." Great extremes of all kinds are present, some of which ...
Paper - Astrophysics - University of Oxford
Paper - Astrophysics - University of Oxford

... 2.1. Formation of stars across the Universe When did stars form? To answer this basic question we can make use of the fact that every star must eventually die. Indeed the more massive stars die in spectacular supernova explosions that can outshine a whole galaxy. With an ELT these explosions can be ...
Habitability of super-Earth planets around main
Habitability of super-Earth planets around main

... from the solid Earth). This work already considered systems of different types of main-sequence stars; however, it was based on an earlier version of stellar evolution models given by Schaller et al. (1992). Moreover, it also did not include stellar post–main-sequence evolution. The study by Franck ...
Science Argumentative Writing Prompt Problem: Scientists have
Science Argumentative Writing Prompt Problem: Scientists have

Astronomy for Kids - Uranus
Astronomy for Kids - Uranus

... journey through our solar system, the pictures it sent back from Uranus were somewhat disappointing. We had hoped to see some color bands like there are on Jupiter or at least some faint colors, but the face the planet presents doesn't seem to vary, regardless of how close or far away from it you ar ...
A sound nebula: the origin of the Solar System in the field of a
A sound nebula: the origin of the Solar System in the field of a

... It consists of trillions of small objects composed of dust and water, ammonia and methane ice and it is believed that these objects were scattered outwards by the gas giants at the planetary formation stage and then acquired distant circular orbits (out to about one light year) as a result of gravi ...
Historical astronomy How Johannes Kepler Johannes
Historical astronomy How Johannes Kepler Johannes

... laws while revising his book, The Harmony of the World. He considered this law — that the cube of a planet’s distance is proportional to the square of its orbital period — one of his greatest achievements. It now forms the basis of the solar system’s structure. In 1627, he completed The Rudolphine T ...
Solar System - Big Spring ISD
Solar System - Big Spring ISD

... Print on cardstock, laminate, cut apart, and bag the Handout: Solar System Object Cards. You will need one set per group of students. Locate and select various books, text books, and reference materials for research. You may wish to request, in advance, that your librarian pull several books and pla ...
IT`S UNIVERSAL GRAVITY CONCEPTS
IT`S UNIVERSAL GRAVITY CONCEPTS

... simply by observing how its moons orbit around it. The mass of Jupiter was calculated this way hundreds of years ago. Calculating gravitational forces also helps astronomers find planets. In the 1840s, the planet Uranus was observed straying from its predicted orbit. Astronomers reasoned that Uranus ...
What, and Why, is the International Astronomical Union?
What, and Why, is the International Astronomical Union?

... of statutes including the goal of “initiating the formation of international Associations or Unions deemed to be useful to the progress of science.” The organizational meeting for the International Astronomical Union took place at the same time, and of course Hale was there. An additional 16 nations ...
CONSTELLATIONS
CONSTELLATIONS

The Habitability of Our Earth and Other Earths: Astrophysical
The Habitability of Our Earth and Other Earths: Astrophysical

... decade, expectations that the universe could be filled with habitable planets have been bolstered by the increasingly large overlap between terrestrial environments known to harbor life and the variety of environments on newly detected rocky exoplanets. The inhabited and uninhabited regions on Earth ...
Unit 6: Astronomy
Unit 6: Astronomy

... Kepler discovered that Mars’ orbit was an ellipse, not a circle, as Copernicus had thought. Kepler published his first two laws of planetary motion in Astronomia Nova in 1609. The first law of planetary motion stated that planets orbit the sun in an elliptical orbit with the sun in one of the foci. ...
Chapter 12: Uranus and Neptune
Chapter 12: Uranus and Neptune

... 1. If Uranus and Neptune are both represented by the size of tennis balls, how big would Jupiter be on the same scale? How big would the Sun be, and how far would Uranus and Neptune be from the Sun using this scale? 2. Describe the technique that was used to discover the rings of Uranus in 1977. 3. ...
The Search for Exoplanets - Worcester Polytechnic Institute
The Search for Exoplanets - Worcester Polytechnic Institute

... Three principal objectives were identified at the onset of project work. These objectives were defined to provide a clear progression of development of the project, and are listed below. Stage 1 Defined the period under which a general overview of the exoplanetary sciences was conducted. The goal of ...
Event Booklet - Exoplanets I Conference
Event Booklet - Exoplanets I Conference

< 1 ... 44 45 46 47 48 49 50 51 52 ... 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