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Lecture 1 Review Sheet
Lecture 1 Review Sheet

... List all the planets and dwarf planets from closest to farthest from the sun What does it mean when astronomers speak of a planet having “cleared all of its orbit”? Why is there an asteroid belt between Mars and Jupiter? What are the three original sources of most meteorites? Why can meteorites most ...
5 - 12.4 CYU Suggested Answers - Tse
5 - 12.4 CYU Suggested Answers - Tse

... the place where the Sun’s physical and gravitational influence ends and is described as a spherical swarm of icy bodies. 15. Student answers will vary but should reflect distances on Figure 11. Uranus is twice as far from the Sun as Saturn. Uranus is 19 times farther from the Sun than Earth. Jupiter ...
FORMATION OF THE SOLAR SYSTEM
FORMATION OF THE SOLAR SYSTEM

... get larger by their gravitational pull attracting more matter creating PLANETS  accreation ...
The Universe
The Universe

... including Pluto 2006 definition of planet included object clearing out all other debris in same orbital plane - Pluto failed this requirement Reclassified as “dwarf planet” Largest asteroid in asteroid belt (Ceres) also reclassified as dwarf planet in 2006 New Horizons First spacecraft to go to Plut ...
ch. 5 study guide
ch. 5 study guide

... o What is a meteorite? a meteor that hits the earth o Know all of the following about the outer planets. (You will be asked to identify one which is not true about them.) They are the farthest from the Sun. They are all bigger than the inner planets. They all have rings. o The Sun is a medium-sized ...
Bianca
Bianca

... The Asteroid belt is made up of large and small rocks and chunks of ice called Asteroids. The Asteroid Belt is in between the inner planets and the outer planets. ...
Solar System Review Sheet KEY
Solar System Review Sheet KEY

... 8. How did technology and/or new methods help to change the model of the solar system? Telescopes made the discovery of Jupiter’s moons and other galaxies possible; using math/scientific method helped prove the heliocentric model was correct. ...
Our place in space
Our place in space

... C. Lowest to highest gravity. Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn, Jupiter ...
Solar System Presentation
Solar System Presentation

... only known dwarf planet in this region. It is spherical and contains a third of the belt’s total mass. ...
The solar system
The solar system

... kilometers into space and faces away from the sun as the comet continues its orbit. ...
IPLS Pages - Plain Local Schools
IPLS Pages - Plain Local Schools

... • Mercury is only slightly larger than our moon, has cratered highlands and smooth terrains like maria. It’s very dense, with a large iron core. Data have confirmed that basaltic volcanism and tectonic activity shape Venus’s surface. • Venus is similar to Earth in size, mass, and density. It is cove ...
Geocentric Model of the Solar System
Geocentric Model of the Solar System

... In 200 A.D., the Greek astronomer Ptolemy explained this “retrograde’ motion by stating that the planets orbited the Earth in a circle, but also orbited another point in a circle, what he called an epicycle. ...
Document
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... What is the object below? • The Hubble Telescope • How is it better than other optical telescopes on Earth? ...
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Instructor Notes

...  bigger than Mercury   2nd largest moon in solar system   only moon with a significant atmosphere   organic chemistry in atmosphere  ...
THE SOLAR SYSTEM
THE SOLAR SYSTEM

... Dwarf Planets: Pluto is now classified as a dwarf planet because of its small size and distant location. It also overlaps Neptune's orbit because it orbits around the sun in a long elliptical (oval shape) manner rather than a circular one like the other planets. Pluto: Pluto is named after the Roman ...
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Document

... Jupiter, Saturn, Uranus, and Neptune. The outer planets are the planets after the asteroid belt. ...
Our Solar System
Our Solar System

... What are Kuiper Belt objects? Class of icy bodies orbiting beyond Neptune. Found only in the outer Solar System (>30AU) Densities of 1.2 to 2 g/cc (mostly ices) Examples: Pluto & Eris (icy dwarf planets) Kuiper Belt Objects (30-50AU) Charon, Pluto’s large moon Sedna & Quaor: distant large icy bodi ...
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Solar System

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Solar System Overview-Sec.1
Solar System Overview-Sec.1

... from the whirling material of the disk ...
Lecture 1 Review Sheet
Lecture 1 Review Sheet

... List all the planets and dwarf planets from closest to farthest from the sun What does it mean when astronomers speak of a planet having “cleared all of its orbit”? Why is there an asteroid belt between Mars and Jupiter? What are the three original sources of most meteorites? Why can meteorites most ...
The Inner Planets Write the letter of each phrase next to
The Inner Planets Write the letter of each phrase next to

... The third planet from the sun. The smallest of the inner planets. The largest of the inner planets. Sometimes called Earth’s twin. Surface used to have running water. May have formed after a Mars-sized body hit the Earth. Has a very old surface. Has a very young surface. Has “seas” called maria. Its ...
Chapter 19 Notes- Planets I. Inner planets – the four inner planets
Chapter 19 Notes- Planets I. Inner planets – the four inner planets

... - Inner planets all have a metal core and rocky surfaces. - Have similar geologic features as Earth does, including mountains, canyons, and craters A.) Mercury- closest planet to the sun - Covered in craters - Almost no atmosphere and no water - very extreme temperatures= 720K during the day and 120 ...
Section 17.1 - CPO Science
Section 17.1 - CPO Science

... 17.1 What is the solar system? • Today, we define the solar system as the sun and all objects that are gravitationally bound to the sun. • The solar system is roughly divided into the inner planets (Mercury, Venus, Earth, and Mars) and the outer planets (Jupiter, Saturn, Uranus, and Neptune) • The ...
Our own Earth`s interior structure, and surface features will be
Our own Earth`s interior structure, and surface features will be

... The near-Earth asteroid, Eros, was studied during the NEAR mission. The extreme drop in the intensity of sunlight was highlighted before moving to planets of the outer solar system. Jupiter was used to introduce the jovian planets (Jupiter, Saturn, Uranus, Neptune). These planets are massive, large, ...
the planets
the planets

... SOUTHWESTERN CHRISTIAN SCHOOL EARTH SCIENCE CHAPTER # 4 - THE PLANETS ...
< 1 ... 101 102 103 104 105 106 107 108 109 >

Dwarf planet



A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. That is, it is in direct orbit of the Sun, and is massive enough for its shape to be in hydrostatic equilibrium under its own gravity, but has not cleared the neighborhood around its orbit.The term dwarf planet was adopted in 2006 as part of a three-way categorization of bodies orbiting the Sun, brought about by an increase in discoveries of objects farther away from the Sun than Neptune that rivaled Pluto in size, and finally precipitated by the discovery of an even more massive object, Eris. The exclusion of dwarf planets from the roster of planets by the IAU has been both praised and criticized; it was said to be the ""right decision"" by astronomer Mike Brown, who discovered Eris and other new dwarf planets, but has been rejected by Alan Stern, who had coined the term dwarf planet in 1990.The International Astronomical Union (IAU) currently recognizes five dwarf planets: Ceres, Pluto, Haumea, Makemake, and Eris. Brown criticizes this official recognition: ""A reasonable person might think that this means that there are five known objects in the solar system which fit the IAU definition of dwarf planet, but this reasonable person would be nowhere close to correct.""It is suspected that another hundred or so known objects in the Solar System are dwarf planets. Estimates are that up to 200 dwarf planets may be found when the entire region known as the Kuiper belt is explored, and that the number may exceed 10,000 when objects scattered outside the Kuiper belt are considered. Individual astronomers recognize several of these, and in August 2011 Mike Brown published a list of 390 candidate objects, ranging from ""nearly certain"" to ""possible"" dwarf planets. Brown currently identifies eleven known objects – the five accepted by the IAU plus 2007 OR10, Quaoar, Sedna, Orcus, 2002 MS4 and Salacia – as ""virtually certain"", with another dozen highly likely. Stern states that there are more than a dozen known dwarf planets.However, only two of these bodies, Ceres and Pluto, have been observed in enough detail to demonstrate that they actually fit the IAU's definition. The IAU accepted Eris as a dwarf planet because it is more massive than Pluto. They subsequently decided that unnamed trans-Neptunian objects with an absolute magnitude brighter than +1 (and hence a diameter of ≥838 km assuming a geometric albedo of ≤1) are to be named under the assumption that they are dwarf planets. The only two such objects known at the time, Makemake and Haumea, went through this naming procedure and were declared to be dwarf planets. The question of whether other likely objects are dwarf planets has never been addressed by the IAU. The classification of bodies in other planetary systems with the characteristics of dwarf planets has not been addressed.
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