• 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
EXPLORATION OF THE KUIPER BELT BY HIGH
EXPLORATION OF THE KUIPER BELT BY HIGH

... fluctuation from ordinary scintillation, we analyzed 19 hr of similar photometric data from Neptune and Uranus occultation observations obtained for different purposes (Sicardy et al. 1991). The conditions of observation were similar, but, with a projected radius >10 km at 40 AU, these stars should ...
Chaotic motion in the Solar System
Chaotic motion in the Solar System

... against (most if not all) sufficiently small perturbations. In the remainder of this discussion, we shall only be concerned with stability in an astronomical sense. Some chaotic regions in the three-body problem have been modeled analytically (cf. Sec. V). However, the analytic results thus far obta ...
On the correlation between stellar chromospheric flux and the
On the correlation between stellar chromospheric flux and the

... Fig. 1. Meridional section of an axisymmetric linear force-free field with an azimuthal flux rope encircling the star. The green solid lines are the field lines of the stellar coronal field, the orange dot is a close-in planet from which matter can evaporate and, after moving towards the star along ...
On disc driven inward migration of resonantly coupled planets with
On disc driven inward migration of resonantly coupled planets with

... leads to the orbital separation of the planets being slightly larger than that required for a strict 2:1 commensurability without considering the history in detail as it is beyond the scope of this paper. However, we comment that this might have been complicated with the planet masses varying with t ...
Embedding Comets in the Asteroid Belt - SwRI Boulder
Embedding Comets in the Asteroid Belt - SwRI Boulder

... Our simulations were performed in the context of the so-called Nice model [10, 11, 5] because it is the most successful model to date at explaining the characteristics of the outer Solar System. In the Nice model, the giant planets are assumed to have formed in a compact configuration (all were loca ...
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University

... the gas giant, losing their lustre over the next few hundred million years. Since Galileo, astronomers have subjected the entrancing rings to intense scrutiny to unlock their secrets. On December 31, 2003, Saturn made its closest approach to Earth for the next 29 years, a mere 1,200,000,000 kilomete ...
with presentation
with presentation

... ● https://www.google.com/search?q=styrofoam+ball&source=lnms&tbm=isch&sa=X&ved=0ahUKEwic2JabwsPMAhWHyj4KHZpmDysQ_AUICCgC&biw=1249&bih=646#imgrc=hnw3rGHWAGHVM%3A ● https://www.google.com/search?client=safari&rls=en&biw=1249&bih=646&tbm=isch&sa=1&q=straws+cut+at+different+lengths&oq=straws+cut+at+diff ...
What is a white dwarf?
What is a white dwarf?

... Shrinkage of White Dwarfs • Quantum mechanics says that electrons in the same  place cannot be in the same state • Adding mass to a white dwarf increases its gravity,  forcing electrons into a smaller space • In order to avoid being in the same state in the same  place some of the electrons need to ...
Astronomy, Chapter 1 Learning Target #1 Explain the motion of the
Astronomy, Chapter 1 Learning Target #1 Explain the motion of the

... Why is Venus referred to as Earth’s twin? Only because of their similar sizes and masses How many moons does each planet have? Mercury &Venus = 0 Earth = 1 Mars = 2 Jupiter = 62 ...
the May 2017 Newsletter!
the May 2017 Newsletter!

... Porrima (Gamma Viriginis, magnitude 2.8) with the naked eye, but this time were able to see it, and, for example, we could see Delta Virginis at magnitude 3.4. Jupiter was the only planet visible, quite high up in the east. All four Galilean moons were visible early on, with Io close in to the west ...
Chapter 11: Our Solar System
Chapter 11: Our Solar System

... Ancient sky watchers noticed that, night after night, the positions of the stars didn’t change relative to each other. However, they noticed that some objects in the night sky moved relative to the stars. The ancient Greeks called these objects planets, their word for wanderers. The solar system we ...
1. INTRODUCTION
1. INTRODUCTION

... planet mass, eccentricity, and orbital distance ; (2) the detection of Jupiter-mass planets beyond 4 AU to compare with our Jupiter ; (3) the characterization of multiple-planet systems ; (4) characterization of planet distributions down to Saturn-masses ; and (5) assessment of correlations between ...
James`s 5-Page Final Exam Review
James`s 5-Page Final Exam Review

... a. A rocket is propelled upwards by the shooting of hot gas out the back: _____ b. A spaceship needs no fuel to keep moving straight in deep space: _____ c. I will weigh less if I stand on the surface of the Moon: _____ d. Getting hit by a more massive baseball will hurt more than a smaller mass bas ...
Extreme Optics and the Search for Earth-Like Planets
Extreme Optics and the Search for Earth-Like Planets

... doppler shift in the parent star’s spectrum due to gravitationally induced wobble. This method works best for large Jupiter-sized planets with close-in orbits. ...
Order of the Planets
Order of the Planets

... Place the eight planets and five dwarf planets in their correct order from the Sun. Write the number that matches each planet or dwarf planet in the corresponding box below. ...
QUANTUM GRAVITY IN THE SOLAR SYSTEM
QUANTUM GRAVITY IN THE SOLAR SYSTEM

... sun - Jupiter. There is fundamental planetary orbit which is that of Mercury ; the remaining ones are bonded to it by equations that are similar to those relating the electron’s orbits to the Bohr orbit, in hydrogen. The similarity between quantum gravity ( QG) and quantum electrodynamics ( QED ) es ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
AST 301 Introduction to Astronomy - University of Texas Astronomy

... Many of the helium atoms in the Universe were also made in the big bang. The other atoms were made inside of stars or during explosions of stars. When the Sun becomes a red giant, carbon and maybe oxygen will be made in its core. But the core will be the left-over white dwarf. The gas put back out i ...
PPT Format of Slides
PPT Format of Slides

... Early astronomers knew Moon, stars, Mercury, Venus, Mars, Jupiter, Saturn, comets, and meteors ...
Storyboard - Miss Swan`s Website
Storyboard - Miss Swan`s Website

... of materials which are lighter than water. Actually if you placed Saturn in a great big pond it would float Student 1: Like an ice cube Teacher: That is exactly it, just like an ice cube in water. Saturn is also unique it that it has 18 moons. That’s the most out of all the planets ...
The Moon`s Orbit
The Moon`s Orbit

... In this the lab, you will chart the Moon’s orbit and measure its true orbital period. You should find that the period does not exactly equal the period of the Moon’s phases. As discussed in class, the month is defined by the time period for the phases of the Moon, which are due to the relative posit ...
Astronomy - Surfin` Through the Solar System
Astronomy - Surfin` Through the Solar System

... 3. Constellation- a group of stars that can be seen as a pattern from Earth 4. Comet- a bright body that orbits the sun in an oval shaped path 5. Meteor- chunks of rock or metal flying through space 6. Asteroid Belt- asteroids that orbit the sun between Mars and Jupiter Procedures/Activities 1. Read ...
A Theory of the Origin of the Solar System There have been
A Theory of the Origin of the Solar System There have been

... inspection of the families of the planets reveals that they show the same salient features as exhibited by the family of the Sun — the coplaner orbits of small eccentricity. This indicates that all might have been formed through the same stages of evolution. The idea may also be extended to one gene ...
Chapter 6 The Solar System
Chapter 6 The Solar System

... Early astronomers knew Moon, stars, Mercury, Venus, Mars, Jupiter, Saturn, comets, and meteors ...
Origins: Where Are the Aliens?
Origins: Where Are the Aliens?

... that can be produced by life. However, other natural processes can also produce these gases. In order to be more confident that they have found the potential for life, scientists would like to find more than one of these gases in the same atmosphere. Finding both oxygen and methane in a planet’s atm ...
January
January

... Except for the probes that have been sent to the planets, astronomers cannot reach out and touch their experiment, which is the universe itself. One of the key measurements in Astronomy is distance. To measure distances, the astronomer must rely on the light from any object. Distances are then deter ...
< 1 ... 59 60 61 62 63 64 65 66 67 ... 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