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Unit 2 Lesson 1
Unit 2 Lesson 1

... • Objects such as comets, meteoroids, and asteroids can hit the surface of other bodies in the ...
$doc.title

... •  Kepler’s laws are just an approximation: we are treating the whole system as a collection of isolated 2-body problems ...
Ancient Astronomy - Mrs. Petersen`s Earth Science
Ancient Astronomy - Mrs. Petersen`s Earth Science

... one of the basic measures of distance for astronomy. When designing probes for trips to other planets in our solar system it is important for the planners to keep the communications time lag, caused by the speed of light, in mind. For example, a probe designed to land on Mars must be smart enough to ...
1704 chart front - Adventure Science Center
1704 chart front - Adventure Science Center

... Maiden. Neither of these constellations has any other bright stars. Even under dark skies away from city lights, it’s hard to imagine these mythological figures just by connecting the dots. Not too far from Spica is the bright planet Jupiter. If you have binoculars, you may be able to see the giant p ...
Big idea # 5 * Earth in space in time
Big idea # 5 * Earth in space in time

... SC.8.E.5.1 Recognize that there are enormous distances between objects in space and apply our knowledge of light and space travel to understand this distance. SC.8.E.5.2 Recognize that the universe contains many billions of galaxies and that each galaxy contains many billions of stars. SC.8.E.5.3 Di ...
Neptune - TeacherLINK
Neptune - TeacherLINK

... hours. Auroras were detected but are much weaker than those on Earth and other planets. Neptune is now known to have eight satellites, six of which were found by Voyager 2. The new satellites are all small and remain close to Neptune's equatorial plane. Names selected from mythology's water deities ...
Scale Model of Solar System - Teaching Commons Guide for
Scale Model of Solar System - Teaching Commons Guide for

... chunks of the stuff that formed our solar system four and one-half billion years ago. We have learned a lot about comets from some previous space missions; but comets are still very mysterious objects. Comets have most likely played an important role in our solar system’s development and maybe even ...
July 2014 Newsletter - Chesterfield Astronomical Society
July 2014 Newsletter - Chesterfield Astronomical Society

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Sky Notes - February 2012 - North Devon Astronomical Society
Sky Notes - February 2012 - North Devon Astronomical Society

... known. It’s brightness is somewhat variable, but with an average magnitude of +7.8, it is visible in binoculars and small telescopes. In addition, the constellation also contains the recently discovered Canis Major Dwarf Galaxy the closest satellite galaxy to Earth. However, it is obscured visually ...
The Planets - Guild of Students
The Planets - Guild of Students

... measure Mercury's motion more accurately than ever before and thus provide one of the most rigorous tests ever of Einstein's theory. BepiColombo is named after Professor Giuseppe (Bepi) Colombo (1920-1984) from the University of Padua, Italy, a mathematician and engineer of astonishing imagination. ...
A scenario of planet erosion by coronal radiation*
A scenario of planet erosion by coronal radiation*

... distribution observed in Fig. 2, confirms that FX is the main variable, with few massive planets surviving exposure to high radiation as discussed below. The distribution of density with mass displayed in Fig. 3 is also consistent with the effects of erosion, since planets with higher densities would ...
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04 Solar System

... Planets Beyond the Solar System These are the orbits of many extra-solar planets discovered so far. Most have masses closer to that of Jupiter than that of Earth. ...
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... 225 days. The mean distance of the Sun from the Earth is 92.9 million miles. Find the mean distance of Venus from the Sun. A. 67,288,700 miles B. 70,000,200 miles C. 80,000,200 miles D. 69,288,700 miles ...
December 2010 Clear Skies Newsletter PDF
December 2010 Clear Skies Newsletter PDF

... internal heat source. The findings were reported November 9 in the Journal of Geophysical ResearchPlanets by Liming Li, then of Cornell University, and colleagues from several institutions, including Goddard and NASA’s Jet Propulsion Laboratory in Pasadena California, which manages the Cassini missi ...
Astronomy - Ocee PTA
Astronomy - Ocee PTA

... (gas; we call these Jovian or gas giants).  The smaller planets are made of mostly what? (rock; we call these terrestrial or rock planets).  What is Pluto now classified as? (a dwarf planet)  Which planets have rings of rocks and gas that circle them? (all gas giants) Segment 1: Phases of the Moo ...
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Homes for life

... conditions on the Earth, so they are by definition ideal for us... We will return to all these points in great detail later as they are obviously of great importance to astrobiology. ...
Sep 2017 - What`s Out Tonight?
Sep 2017 - What`s Out Tonight?

... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
ART. VULCAN/05
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... If we consider the conscious power of planetary bodies involved in the interactive energetic organisation of an earthquake, and translate it into scientific keywords, we find therefore: Vulcan, as will and power of decision, which means the seismic momentum. Pluto represents the deep transformation ...
s*t*a*r chart - Ontario Science Centre
s*t*a*r chart - Ontario Science Centre

... way of mapping the night sky. Modern astronomers still use the traditional names, which give today’s stargazers a permanent link to the sky myths and legends of the past. This season's evening sky features Orion the Hunter. Connect three bright stars to form Orion’s belt. Betelgeuse, a red super-gia ...
A Planetary Overview
A Planetary Overview

... (Charon). It will be visited by spacecraft in 2015. • Soon in the 1990s other objects out where Pluto lived were being discovered. One of these, Eris, was found to be a little larger than Pluto • In 2006, the phrase “dwarf planet” was defined for these objects and asteroids (like Ceres) which were r ...
High Contrast - University of Arizona
High Contrast - University of Arizona

... UV/Optical imaging and spectroscopy of collisionally evolved circumstellar debris and co-orbital bodies will play a pivotal role in furthering our understanding of the formation and evolution of exosolar planetary systems. To study physical processes acting over sub-AU spatial scales and time scale ...
Comets and Mass Extinction
Comets and Mass Extinction

... • In March 1993 astronomers Shoemaker and Levy discovered a comet orbiting Jupiter that collided with on July 16, 1994. A large fireball, easily observable from the spacecraft Galileo, brought the atmospheric temperature in the region of impact up from 130 K to 24,000 K. Fragments continued to rain ...
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M WHITE DWAR F The WhiTe-hoT Core

... pairs of stars orbiting each other, are fairly common. As many as half the stars in the Milky Way might be binary stars! ...
Friday, Oct. 10
Friday, Oct. 10

... related to their masses. ...
contents
contents

... terrestrial, or rocky, inner planets (Mercury, Venus, Earth and Mars). Further out, where gravity was weaker, lighter elements formed the gas giants (Jupiter, Saturn, Uranus and Neptune). ...
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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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