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Sun, Moon, and Earth Notes
Sun, Moon, and Earth Notes

... universe- Everything that exists anywhere in space. It includes all the galaxies, stars, planets, and other bodies that they may contain. star- A huge ball of glowing gas that appears as a bright point in the night sky. Astronomers think there are more that 200 billion stars in the universe. sun- Th ...
Solar System - Joy Senior Secondary School
Solar System - Joy Senior Secondary School

... their distance from sun • The planets according to their distance from sun are:• Mercury • Venus • Earth • Mars • Jupiter • Saturn • Uranus • Neptune ...
Moon PowerPoint Template
Moon PowerPoint Template

... PLANETS ...
CIENCIAS NATURAIS – 1º de ESO
CIENCIAS NATURAIS – 1º de ESO

... Graspra is a small asteroid about 19 km long. It is composed of rock and metal typical of most of the many thousands of asteorids that are found orbiting the Sun in a wide belt between Jupiter and Mars. About 100 000 asteroids are large enough to be seen from the Earth. The largest is Ceres, wich is ...
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SPACE By: Hailey Merrill and Katie Whatley Earth

... There is a lot of water on the earth in fact there is so much water that you could cover the entire atmosphere with 1 inch of water. In 1783 an ice land eruption threw up enough dust to temporally block out the sun over Europe Approximately 40,000 meteoritic dust hits the earth each year. Earth is a ...
A lesson on Gravity and the Solar System - ICE-CSIC
A lesson on Gravity and the Solar System - ICE-CSIC

... Rotation time: same as around the Earth Temperture: ranges from -230o F to 220o F ...
The Milky Way
The Milky Way

... Due to the vast distances involved, many representations of the Solar System show orbits the same distance apart. In reality, with a few exceptions, the farther a planet or belt is from the Sun, the larger the distance between it and the previous orbit. Attempts have been made to determine a relati ...
the universe notes - Cloverleaf Local Schools
the universe notes - Cloverleaf Local Schools

... About 15 billion years ago there was a gigantic explosion, making the universe. There was nothing (no time, space, or energy) the explosion started it all. Proof of Big Bang 1. The Universe is expanding.  Hydrogen in the stars show a RED SHIFT, meaning that the stars are moving away from us.  This ...
New Scientist Magazine - Surrey, England… 19th November 2008
New Scientist Magazine - Surrey, England… 19th November 2008

... It sounds like a simple enough wish list, but finding a planet that fulfils all of these criteria has kept astronomers busy for decades. Until recently, it meant finding a planet in the "Goldilocks zone" - orbiting its star at just the right distance to keep surface water liquid rather than being bo ...
Kepler`s Laws (ANSWER KEY)
Kepler`s Laws (ANSWER KEY)

... (Giancoli, p 142, #53) Neptune is an average distance of 4.5 × 10 9 km from the Sun. Estimate the length of the Neptunian year given that the Earth is 1.50 × 10 8 km from the Sun on the average. 1.6 x 102 year ...
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Contact: Sharon Worthy

... that two Earths would fit in it. The spot is thought to be a high-pressure weather system. Befitting such a behemoth, astronomers so far have discovered 61 celestial bodies orbiting Jupiter, including four large moons, three of which are larger than Earth’s moon. The Galileo spacecraft was launched ...
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A105 Stars and Galaxies

...  A planet orbits the star e Eridani at a radius of 3.2 A.U.  e Eridani is similar to our Sun  e Eridani is only 10.5 light years away  The planet is similar to Jupiter  The planet orbits e Eridani in 7 years  e Eridani has at least one more planet ...
Defrosting North Polar Dunes
Defrosting North Polar Dunes

... hydrogen and helium with enough methane to give it a bluish tint. Winds on Neptune blow faster than on any other planet. The discoveries of Neptune and its largest moon, Triton, came less than a month apart in 1846. Mathematicians had accurately predicted where Neptune could be discovered, based on ...
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... and Neptune • Semimajor axes: 19.19 au (U) and 30.06 (N) • Orbital periods: 84.01 years (U) and 164.8 years (N) • Diameters: 4.0XEarth (U) and 3.9XEarth (N) • Masses: 14.5XEarth (U) and 17.1XEarth (N) ...
Our Solar System
Our Solar System

... Have the student work in pairs; talk about the planet distances and sizes compared to a scale model. The distances to the planets and the sizes of the planets are shown on the same scale, which is 1 inch = 12,000 miles. At this scale, Jupiter is 1,111 yards from the Sun and is represented by a socce ...
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The Milky Way - Drage Homepage

... Due to the vast distances involved, many representations of the Solar System show orbits the same distance apart. In reality, with a few exceptions, the farther a planet or belt is from the Sun, the larger the distance between it and the previous orbit. Attempts have been made to determine a relati ...
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Planets of the Solar System Section 2 Kepler`s Laws, continued

... force that exists between any two objects in the universe. • While gravity pulls an object towards the sun, inertia keeps the object moving forward in a straight line. The sum of these two motions forms the ellipse of a stable orbit. • The farther from the sun a planet is, the weaker the sun’s gravi ...
Early Observers (The Beginnings of Astronomy)
Early Observers (The Beginnings of Astronomy)

... Had complex systems of mathematics and astronomy. Many buildings were aligned with celestial bodies during certain astronomical events ...
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 ...
celestial si ghtseeing
celestial si ghtseeing

... Also in 2004, one of the largest and most complex interplanetary spacecraft ever conceived, NASA's Cassini, will arrive at Saturn after a seven-year flight. The school-bus-size robot will study the planet's rings and deploy a European-built probe called Huygens, which will penetrate the clouds cover ...
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Grade 9 Science Part 3 Other Celestial Bodies

... - Pluto is now considered part of this ...
12Kepler - NMSU Astronomy
12Kepler - NMSU Astronomy

Solar System Review Sheet - Grosse Pointe Public School System
Solar System Review Sheet - Grosse Pointe Public School System

... Number of rings Number of moons ...
Open File
Open File

... when the Earth’s shadow falls on the moon because the Earth is between the moon and the sun ...
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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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