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The Search for Another Earth
The Search for Another Earth

... be floating freely while some planets are discovered around binary stars. ...
Chapter 08
Chapter 08

... 27. Why are the rings of Saturn so bright? A) Light reflected off of gigantic Titan reinforces the sunlight. B) They are made of metallic iron, never rusted by exposure to oxygen. C) They are made of young, fresh water ice. D) They are made of glassy beads expelled by the volcanoes of Enceladus. E) ...
Astrobiology: The Search for Extraterrestrial Life
Astrobiology: The Search for Extraterrestrial Life

... Astrobiologists strive to answer the question of whether life exists beyond Earth, and if so, how to locate it. In order to provide answers to this question, astrobiologists utilize several different scientific fields, including physics, chemistry, astronomy, biology, geography, and many others. As ...
AyC10 Fall 2007: Midterm 2 Review Sheet
AyC10 Fall 2007: Midterm 2 Review Sheet

... mass of the star) to get the planet’s orbital distance. Based on the strength of the wobble, we can also determine a minimum value for the planet’s mass, but not the exact value, because we don’t know the extent to which the orbit and wobble are along our line of sight. The Doppler method is limited ...
The Night Sky 12-07
The Night Sky 12-07

... evening twilight. During the first few days of April, before it disappears from view, Mercury can be glimpsed along the horizon well below Mars. Jupiter reaches opposition this month, which means that it will be up all night long and high in the south at local midnight. For us in the U.P. on Eastern ...
The Sidereal Messenger - UB
The Sidereal Messenger - UB

... number of fixed stars, yet they made me wonder somewhat, because they seemed to be arranged exactly in a straight line parallel to the ecliptic, and to be brighter than the rest of the stars equal to them in magnitude. I have wanted to report these comparisons of the position of Jupiter and its adja ...
Frostburg State Planetarium presents
Frostburg State Planetarium presents

... Why does Sun Rise & Set? • For thousands of years, humans believed that sun & sky objects moved about Earth every day! • In the 1500’s, Copernicus proposed that the Earth itself was moving, not the sky objects! • Copernicus wrote that the Earth was spinning every day and orbiting the sun every year ...
DeltaScience - Delta Education
DeltaScience - Delta Education

... baseball and a tennis ball are about the same size. However, a baseball is heavier because it has more mass. Thus it is more dense than a tennis ball. ...
Trading Cards - Amazing Space
Trading Cards - Amazing Space

Chapter 9
Chapter 9

... • Most moons are inundated with craters, many of which are surrounded by white markings of shattered ice • The moons also have several surface features that have yet to be explained ...
Frostburg State Planetarium presents
Frostburg State Planetarium presents

... Why does Sun Rise & Set? • For thousands of years, humans believed that sun & sky objects moved about Earth every day! • In the 1500’s, Copernicus proposed that the Earth itself was moving, not the sky objects! • Copernicus wrote that the Earth was spinning every day and orbiting the sun every year ...
4-3.1 - S2TEM Centers SC
4-3.1 - S2TEM Centers SC

... average distance of the Earth from the Sun. Explain that in the actual solar system. Earth is 1AU from the sun. Have a student measure and mark Earth’s position in the model. (1 foot away from the sun). Direct “Earth” to stand at that mark. Ask students “Where should Venus and Mercury stand?” (betwe ...
Mon Jul 4, 2011 4TH OF JULY COSMIC FIREWORKS On the 4th of
Mon Jul 4, 2011 4TH OF JULY COSMIC FIREWORKS On the 4th of

... 4TH OF JULY COSMIC FIREWORKS th On the 4 of July in the year AD 1054, a bright star suddenly appeared in the eastern predawn sky. It was off in the direction of the constellation Taurus, just behind the forward horn tip of the bull. For the next several weeks this new star, this “nova,” was so brigh ...
here
here

... • Neptune: discovered in 1846 by Johann Galle (based on the predictions of John C. Adams and Urbain Leverrier). • Pluto: discovered in 1930 by Clyde Tombaugh. • Asteroids: thousands, starting in 1801. • Kuiper Belt Objects: Dozens, starting in the 1980s. ...
Notes for Unit 5
Notes for Unit 5

... The next section deals with the history of astronomy from Greece to Newton, a favourite topic of mine. The book leaves out some absolutely critical events (like Ptolemy, HELLO PEOPLE?!?!). So, I took the liberty of filling in some gaps. The stuff in italics are things mentioned in the text; all the ...
Planet Riddles - Super Teacher Worksheets
Planet Riddles - Super Teacher Worksheets

... No matter how hard you look, you'll never find me, Unless you have a telescope to help you see. I was once called a planet, but not any more. Now I'm just a “Dwarf Planet,” but too important to ignore. Which planet am I? __________________________________ ...
SkyMatters Jan-2017 - CIT Blackrock Castle Observatory
SkyMatters Jan-2017 - CIT Blackrock Castle Observatory

... Farther to the right is the Seven Sisters, or Pleiades, another open cluster of young stars. The gas from which they were formed can still be seen in photographs. Taurus, the Bull, is seen attacking Orion ,the Hunter, who has a defensive shield of stars held up to protect him. To the left of Taurus ...
The atmospheres of different planets
The atmospheres of different planets

Model of Solar System
Model of Solar System

... tools and technology that are used to gather information about space; apparent daily motions of the Sun, the Moon, the planets, and the stars; rotation of the Earth about its axis, and the Earth's revolution around the Sun; tilt of the Earth's axis that produces seasonal variations in climate; and e ...
© The Multi Taskin Mom | http://www.themultitaskinmom.com
© The Multi Taskin Mom | http://www.themultitaskinmom.com

Answers to Final Exam – Study Guide
Answers to Final Exam – Study Guide

... 64. The type of high tide that occurs when the earth, the moon and the sun are all lined up is called a spring tide 65. An object thrown upward into the air experiences negative acceleration called deceleration 66. Draw the third quarter of the moon. 67. The point on a planet’s or comet’s orbit wher ...
Astron 104 Laboratory #2 Planetary Motion and the Night Sky
Astron 104 Laboratory #2 Planetary Motion and the Night Sky

... points of light? Feel free to draw your own; there’s no correct answer here! You can describe what you see in the space below the images. [5 pts] ...
lesson13 - e
lesson13 - e

... completed their Planetary Trading Cards and their Planetary Posters and will have some knowledge about the planets and their major characteristics. The writers of the letters or emails do not identify their locations, so students will have to use the clues in the letters to determine from which plan ...
here
here

... • Neptune: discovered in 1846 by Johann Galle (based on the predictions of John C. Adams and Urbain Leverrier). • Pluto: discovered in 1930 by Clyde Tombaugh. • Asteroids: thousands, starting in 1801. • Kuiper Belt Objects: Dozens, starting in the 1980s. ...
November 2014 - Hermanus Astronomy
November 2014 - Hermanus Astronomy

... region would cool and contract, pulling away from its surroundings and creating fractures similar to the cracks that form in mud as it dries out, but on a much larger scale. The study also noted a surprising similarity between the rectangular pattern of structures on the Moon and those surrounding t ...
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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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