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pagina 1 van 2 Page 1 of 2

... Pupils may complete the summary as follows: Astronomers are excited, because a new solar system with seven planets has been found. The planets circle around a dwarf star, called Trappist-1. Astronomers found the dwarf star Trappist-1 with a telescope. When they looked at it with stronger and bigger ...
Powerpoint Presentation Physical Geology, 10/e
Powerpoint Presentation Physical Geology, 10/e

... • composed of hydrogen and helium gases, with a small ice/rock core • atmospheric clouds are composed of methane, ammonia and water ices • high pressure deep in the interior, results in ...
Georgia Performance Standard Or QCC Objective
Georgia Performance Standard Or QCC Objective

... S6E1 – Students will explore current scientific views of the universe and how those views evolved. a) Relate the Nature of Science to the progression of basic historical scientific models (geocentric, heliocentric) as they describe our solar system, and the Big Bang as it describes the formation of ...
planets suitable for life
planets suitable for life

... The number 4 x 106 still seems to be an optimistic estimate, if giant Moon is necessary to make Earth suitable for life. The same number could well be a pessimistic estimate, if migration of Jovian planets is not so common a phenomenon in reality. Recent progress in theory of planet formation and di ...
Document
Document

... 2) Emergence of the first gas giants after the disk mass was reduced to that of the minimum nebula model. 3) Planetary mobility promotes formation & destruction. 4) The first gas giants induce formation of other siblings. 5) Shakeup led to the dynamically porous configuration of the inner solar syst ...
Structure of the Solar System
Structure of the Solar System

... Why don’t you try this website? Click on each picture then you will hear the name of the planet. Don’t forget to make sure your flash player in the computer and your speakers are working. ...
Chapter 11 (in pdf)
Chapter 11 (in pdf)

... •  All four jovian planets have ring systems •  Others have smaller, darker ring particles than Saturn ...
Hmwk2012 - science9atsouthcarletonhs
Hmwk2012 - science9atsouthcarletonhs

... Complete the following work in a separate homework folder. Organize the work by section. Clearly underline titles and defined words. You are responsible for the vocabulary in each section. However, you only need to define those terms not already completed in class. With the exception of starred (*) ...
Inner versus Outer Planets
Inner versus Outer Planets

... Astronomers think that hydrogen and helium gases comprised much of the solar system when it first formed. Since the inner planets didn’t have enough mass to hold on to these light gases, their hydrogen and helium floated away into space. The Sun and the massive outer planets had enough gravity to ke ...
Chapter 15 The Formation of Planetary Systems
Chapter 15 The Formation of Planetary Systems

... Current record holder, until last year. ...
Solar System PowerPoint
Solar System PowerPoint

... the Asteroid Belt, they are: Jupiter, Saturn, Uranus, Neptune and the dwarf planets Pluto and Eris • Jupiter, Saturn, Uranus, and Neptune are called “Gas Giants” . They are much larger than Earth and do not have solid surfaces ...
Introduction to the Solar System
Introduction to the Solar System

... Humans’ view of the solar system has evolved as technology and scientific knowledge have increased. The ancient Greeks identified five of the planets and for many centuries they were the only planets known. Since then, scientists have discovered two more planets, many other solar-system objects and ...
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–1– AST104 Sp04: WELCOME TO EXAM 1 Multiple Choice

... a. because red light has more energy b. because red light has shorter wavelengths c. because red light scatters more than blue d.* because red light scatters less than blue e. only to color-blind folks 21. Ptolemy’s model of the universe a. was identical to the Copernican model b.* placed the Earth ...
Moons and Rings of Outer Planets
Moons and Rings of Outer Planets

... These two global images of Iapetus show the extreme brightness dichotomy on the surface of Iapetus. Images taken by Cassini spacecraft December 27, 2004 (left panel) and September 10, 2007. Click here for more information. ...
History of astronomy
History of astronomy

Astro 10-Lecture 13: Formation and Structure of the Solar
Astro 10-Lecture 13: Formation and Structure of the Solar

... 4a. Because the inner solar system was hot, only rock and metal could condense which resulted in terrestrial planets 4b. The outer solar system was cold enough for ices to condense and for hydrogen gas to be captured by a massive enough body. This resulted in Jovian planets. 4c. If an object in the ...
Star and Planet Formation - Homepages of UvA/FNWI staff
Star and Planet Formation - Homepages of UvA/FNWI staff

... 1. If the Earth rotates around the Sun, birds should actually stay behind because of the movement of the Earth on its orbit. 2. If the Earth rotates around its axis (as required to explain day and night), things should fly off the spinning planet. 3. If the Earth rotates around the Sun, we should ob ...
Force and Motion How To Get and Hold Onto A Moon
Force and Motion How To Get and Hold Onto A Moon

... Back to the impact debris. Some of the matter fell back to Earth in the usual way. But some of the matter that ew out in a straight line had its path altered by the force due to Earth’’s gravity. Take a rock the size of a trash can as an example. It ew off in a straight line like that shown on the ...
Death of Low Mass Stars 8 Solar Masses or less
Death of Low Mass Stars 8 Solar Masses or less

... subject to a series of explosions that eject gas and dust into space (nebula). • A star can lose up to 1/2 the original mass. • Diameter can be very large (typically 1 ly) • Gas expands 30 km/s • Usually circular in shape • Gas and dust in nebula becomes part of the interstellar medium (ISM). Makes ...
Structure of the Solar System - Beck-Shop
Structure of the Solar System - Beck-Shop

... five satellites with periods given by the formula in Eq. (1.6), we can determine the number that have a value of χ < 0.0247 for these values of L and U . Hence we estimate that the probability that the current configuration has arisen by chance is 0.79. Thus, despite the seemingly impressive fit displa ...
Asteroids
Asteroids

... Trojan Asteroids • The law of gravity permits an orbit around the sun exactly 60º ahead of and behind Jupiter, called Lagrange points. – Asteroids collect there – Several hundred Trojan asteroids locked to Jupiter ...
Bell work - TeacherWeb
Bell work - TeacherWeb

... Bell work ...
December 2015 - Hermanus Astronomy
December 2015 - Hermanus Astronomy

... objects accelerates so much that it breaks free from the massive gravitational pull of the Sun. However, earlier studies that proposed giant planets could possibly eject one another did not consider the effect such violent encounters would have on minor bodies, such as the known moons of the giant p ...
Chapter 1: Origin of the earth
Chapter 1: Origin of the earth

... very refractory material. Venus, Earth, Mars and the asteroids are more similar to one another. (Mercury’s high density is actually most plausibly explained by removal of much of the silicate mantle by collision with a large body). The major planets are very different in composition being largely ga ...
In this chapter we briefly review the origin of the Earth, from the Big
In this chapter we briefly review the origin of the Earth, from the Big

... very refractory material. Venus, Earth, Mars and the asteroids are more similar to one another. (Mercury’s high density is actually most plausibly explained by removal of much of the silicate mantle by collision with a large body). The major planets are very different in composition being largely ga ...
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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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