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... and Mars. These planets are all made of rock and have a solid surface. Mercury is the planet closest to the sun, and it is the smallest of the eight planets. Because it is so close to the sun, from Earth it can only be seen at sunrise in the east and sunset in the west. This makes the planet seem li ...
(Lecture 3). The Solar System in the Night Sky (cont)
(Lecture 3). The Solar System in the Night Sky (cont)

... count 365 days, and exactly 365 mean solar days later, as the Sun crosses the Meridian, we celebrate the start of the new year. The trouble is, the Sun has not returned to the same place relative to the stars. It is still 0.25 days away from that point. After the next year, it is half a day, and the ...
the solar system
the solar system

... Solar System is made up of a star and everything that travels around it from planets, their satellites and dwarf planets. Also includes asteroids, comets, and meteroids. Sun exerts a gravitational pull on all the bodies within the system. Our solar system is located in the Orion arm of the milky way ...
Warm Up - Cloudfront.net
Warm Up - Cloudfront.net

... • Astronomical Unit (AU) – average distance from Earth to the sun (~150 million kilometers) ...
Lecture13
Lecture13

... the free-fall timescale, which can be as short as a few hundred years. ...
Poor Pluto: Everyone`s favorite dwarf planet
Poor Pluto: Everyone`s favorite dwarf planet

... CHAPEL HILL -- Faith Coggins never knew about Pluto when it was a planet. The 8-year-old's introduction to it came just a few weeks ago when Lauren McLeod, her teacher at Deep River Elementary School in Sanford, read her class a book called "Poor Pluto." "It said that Pluto didn't have a family anym ...
For Chapter 16 on November 26, 2012
For Chapter 16 on November 26, 2012

... • Discovered in 1846 by Johann Galle, a German astronomer • Englishman John Couch Adams and Frenchman U.J.J. Leverrier were mathematicians using Newton’s law of gravitation • They noted that Uranus’ motion was disturbed and predicted the location of another planet – this is how Galle eventually disc ...
Planets and Dwarf Planets - Super Teacher Worksheets
Planets and Dwarf Planets - Super Teacher Worksheets

... This is a very exciting time. New objects in space are still being discovered! Scientists say there will likely be more dwarf planets announced in the next few years. What will be the name of the next dwarf planet? What name would you choose? ...
Due: January 7, 2014 Name
Due: January 7, 2014 Name

... more times, but vary the distribution of planets along the initial line a little bit. What common themes do you see in the outcomes of the three simulations? ...
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Script Planets of our Solar System

... You might think the minimum size requirement is arbitrary, but the size cutoff is actually based on other properties of the object and its history in the Solar System. Both planets and dwarf planets orbit the Sun, not other planets (in which case we call them moons). Both must be large enough that t ...
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Document

... natural satellite. It is named after the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from ...
Document
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... natural satellite. It is named after the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from ...
Document
Document

... the Big Bang. The discovery suggested planets are very common in the universe and raised the prospect that life began far sooner than most scientists ever imagined. ...
Information extracted from Britannica 97
Information extracted from Britannica 97

... the naked eye since ancient times. Its existence had been postulated on the basis of apparent perturbations of the motions of Uranus and Neptune, which suggested that a more distant planet was gravitationally disturbing the two then outermost planets. It is now known that these perturbations were sp ...
Making Inferences QR Task Cards
Making Inferences QR Task Cards

... Making Inferences I am the second planet away from the Sun and the closest planet to Earth. I am named after the Roman goddess of Love and Beauty. I have a thick swirling cloud cover over my surface. I rotate extremely slow, taking 243 days to turn on my axis. ...
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94263_Solar_Sys_Halfs

... Bode’s Law predictions. How close are Bode’s Law predictions and your measurements to the ACTUAL AU distance? 2. Pluto is not a planet, but Bode’s Law predicted the farthest planet to be at 78 AU (Pluto’s average orbital distance is 39.6 AU). Neptune and Pluto were not discovered in Bode’s lifetime. ...
INSTITUTO EDUCACIONAL SÃO JOÃO DA ESCÓCIA
INSTITUTO EDUCACIONAL SÃO JOÃO DA ESCÓCIA

... The Sun, eight planets and their moons, an asteroid belt and many comets and meteors are in our Solar System. The Sun is in the center. It is a large, bright object in the Solar System. Around the Sun there are planets,moons,dwarf planets, asteroids, comets, meteoroids, rocks, interplanetary dust an ...
Astronomical Ideas Fall 2012 HW 2 solutions 1. a. Compare the
Astronomical Ideas Fall 2012 HW 2 solutions 1. a. Compare the

... M star than it would block out from a Sun-like star. 3. a. Why are the semi-major orbital radii of these first 77 confirmed Kepler planets typically smaller than the orbital radius of the Earth (1 AU)? This could be a result of true planetary demographics (planets tend to be closer than the Sun than ...
Solar System
Solar System

The Planets Within Our Solar System
The Planets Within Our Solar System

Some 250 years ago, the philosopher Immanuel Universal
Some 250 years ago, the philosopher Immanuel Universal

... Caves honeycomb the Mingsha Hill some 25 shows 26 drawings of differently shaped clouds used in geographical mapping today. kilometres southeast of Dunhuang, a desert accompanied by text on cloud divination. The Ancient Chinese astronomers divided the town in Gansu province. Excavated between other ...
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Lecture11

... also large amounts of water, ammonia, and methane ice. Formed very differently: gathered ice (cooler temperatures far from sun), then sucked in hydrogen and helium gas. ...
GLE 6 - SLPS
GLE 6 - SLPS

... GLE 6.2.D.c: Describe how the Sun’s gravitational pull holds the Earth and other planets in their orbit The sun's gravitational pull holds the Earth and other planets in their orbit. Newton's Law of Universal Gravitation Mass = a quantity of matter. The more mass an object has, the harder it is to m ...
The Sun Our sun is a star. It is the star we see in the daytime. It is the
The Sun Our sun is a star. It is the star we see in the daytime. It is the

... In ancient times, people did not have telescopes. When they wanted to know what’s there in the sky, they had just their eyes to use. They could only see the objects close to Earth. When telescopes were invented, astronomers could see much more. In 1977, some special spaceships (Voyager 1 and Voyager ...
Solar system
Solar system

... Gravity is a force that holds the objects of our solar system in orbit Earth, its moon, and the sun form a system within our solar system The planets were created from a nebula that formed after a supernova ...
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Planets beyond Neptune



Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities.Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the Voyager 2 spacecraft found that the irregularities observed in Uranus's orbit were due to a slight overestimation of Neptune's mass. After 1992, the discovery of numerous small icy objects with similar or even wider orbits than Pluto led to a debate over whether Pluto should remain a planet, or whether it and its neighbours should, like the asteroids, be given their own separate classification. Although a number of the larger members of this group were initially described as planets, in 2006 the International Astronomical Union reclassified Pluto and its largest neighbours as dwarf planets, leaving Neptune the farthest known planet in the Solar System.Today, the astronomical community widely agrees that Planet X, as originally envisioned, does not exist, but the concept of Planet X has been revived by a number of astronomers to explain other anomalies observed in the outer Solar System. In popular culture, and even among some astronomers, Planet X has become a stand-in term for any undiscovered planet in the outer Solar System, regardless of its relationship to Lowell's hypothesis. Other trans-Neptunian planets have also been suggested, based on different evidence. As of March 2014, observations with the WISE telescope have ruled out the possibility of a Saturn-sized object out to 10,000 AU, and a Jupiter-sized or larger object out to 26,000 AU.
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