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Unit Review Answers - click here
Unit Review Answers - click here

... 16. The classification of inner and outer planets is based on the composition and distance from the Sun. The inner planets are closest to the Sun (inner part of the solar system) and have rocky compositions, so they should be classified together. The outer planets are much farther away from the Sun ...
Semester Review Answers - School District of La Crosse
Semester Review Answers - School District of La Crosse

... Venus and the earth? Venus high amt of green house gases 22. A planet which has a magnetic field may imply what type of core?Molten metallic 23. The scientist who first choose to think of the solar system as heliocentric was: Aristarchus 24. Galileo was put under pressure from the church because: al ...
Earth years
Earth years

... system in which all of the planets revolve around the sun; Copernicus believed in this heliocentric system ...
Planetary Taxonomy
Planetary Taxonomy

The Origin of the Solar System
The Origin of the Solar System

... observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
Slide 1
Slide 1

... wave telescope is located in Puerto Rico with a diameter of 305 meters and is suspended over a ...
Jupiter
Jupiter

... The largest moon in our solar system is hiding an ocean under its surface, according to observations made with the Hubble Space Telescope. Aurorae spotted by the telescope, confirmed the long standing theory, and the findings were announced during a NASA teleconference. The news comes just a day aft ...
4 - grade 6 science
4 - grade 6 science

... d) I am the second biggest of all nine planets. I am _________________. e) I have thick, toxic, yellow clouds surrounding me, so I am VERY hot. I am ___________. f) My days are longer than my years, which are only about 225 earth days. I am ___________. g) I was the last “planet” to be discovered, a ...
The Planets
The Planets

... Is no longer considered a planet (since 2006) Now classified as a “dwarf planet” which also includes Ceres and Eris Has a Moon (Charon) that is half as big as Pluto itself Charon and Pluto move around each other ever 6.5 days Has at least two other small moons (Hydra and Nix) Is frozen and dark Rock ...
Toilet Paper Solar System
Toilet Paper Solar System

... Interplanetary travel is extremely difficult due to the almost unimaginable distances between the planets in our solar system. Voyager II, traveling at nearly 50,000 mph took 12 years to reach the planet Neptune! This gives you an idea of just how far our planets are from each other. However, we can ...
Mini-Assessment-SC.5.E.5.3
Mini-Assessment-SC.5.E.5.3

Astronomy Test Review
Astronomy Test Review

... 8. Why can we see some stars all year round, but others only during certain seasons? 9. Draw what the moon looks like in each of the following phases: a. Waxing crescent b. Waning gibbous c. First quarter 10. Why is it that we can see Jupiter, Mars and Saturn very well during some nights, but Venus ...
L`Aquila verdict poses risk for science
L`Aquila verdict poses risk for science

... An international team of astronomers together with volunteers using the Planethunters.org website identified and confirmed the discovery of this circumbinary planet (PH1) in a four-star system. The volunteers, Kian Jek of San Francisco and Robert Gagliano of Cottonwood, Arizona, spotted faint dips i ...
Page 48
Page 48

Citizen science finds planet
Citizen science finds planet

... An international team of astronomers together with volunteers using the Planethunters.org website identified and confirmed the discovery of this circumbinary planet (PH1) in a four-star system. The volunteers, Kian Jek of San Francisco and Robert Gagliano of Cottonwood, Arizona, spotted faint dips i ...
PLANETARY TRAVEL PROJECTS (50 pts, due April 3)
PLANETARY TRAVEL PROJECTS (50 pts, due April 3)

... The second destination must be a gas giant (jovian planet.) As the name suggests, these are the large planets made mostly of gas farther from the sun. The four gas giants are Jupiter, Saturn, Uranus, and Neptune. Your final destination must be something in the solar system that’s not a planet. You m ...
friends of the planetarium newsletter - june 2010
friends of the planetarium newsletter - june 2010

... South Equatorial Belt (SEB), the brown cloudy band is twice as wide as Earth and more than twenty times as long. The loss of such an enormous "stripe" can be seen with ease halfway across the solar system. "In any size telescope, or even in large binoculars, Jupiter's signature appearance has always ...
August 2016
August 2016

... water. The Voyager Probe discovered Jupiter’s third Galilean moon to be the largest moon in the solar system at a diameter of 3,273 miles. Titan, Saturn’s huge moon was considered the largest, is slightly smaller. Ganymede is larger than planet Mercury and all the dwarf planets -- Pluto, Ceres, Eris ...
Test#2
Test#2

... 16. What is the process of accretion? a) Growth of an object by the accumulation of matter. b) The breakup of large objects by violent collisions with other similar-sized objects. c) The period of time during which the Sun swept away all the excess material in the solar nebula. d) It is the process ...
No Slide Title
No Slide Title

... radius a and albedo A orbiting the Sun at a distance of r A.U. from it. Albedo = fraction of incident light reflected. The radiance at the Sun’s surface is σT4 where T = 5779 K. The surface area of the Sun is 4πR2, so the total emergent radiant flux from the Sun is = 4πRσT4. At a distance r from ...
File
File

... Comets often produce two tails: Gas (Ion) Tail—gases emitted from the ...
Powerpoint
Powerpoint

... • Much of the knowledge of the world came together as the rule of Alexander spread across Europe, Asia, and Northern Africa. • Founded the city of Alexandria • Library of Alexandria contained the written works and inventions of many great thinkers and scientists. ...
Document
Document

... • Gliese 581 C marked a milestone in the search for worlds beyond our solar system. It is the smallest exoplanet ever detected, and the first to lie within the habitable zone of its parent star, thus raising the possibility that its surface could sustain liquid water, or even life. It is 50 percent ...
History of astronomy
History of astronomy

... center of all the Sun resides. For who would place this lamp in another or better place within this most beautiful temple, than where it can illuminate the whole at once? Even so, not inaptly, some have called it the light, mind, or ruler of the universe. Thus indeed, as though seated on a throne, t ...
Lecture powerpoint
Lecture powerpoint

... Using the planetary data from the back cover of the textbook, find the location where a spacecraft experiences an equal but opposite gravitational force from the Earth and the Moon. Give your answer as a ratio of the distance from the from the center of the Earth divided by the distance from the cen ...
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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.
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