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Lab 1
Lab 1

... All of the following objects are part of the solar system. Make sure you can distinguish them for exam purposes: Star: An object so massive that nuclear fusion is triggered in its interior, and thus it shines. Planet: Too small trigger nuclear fusion, these relatively large objects orbit a star. Moo ...
Big Bang
Big Bang

... • Star Formation: Stars are formed within extended regions of higher density in the interstellar medium. These regions are called molecular clouds mainly composed of hydrogen plus helium • Main Sequence: Stars spend about 90% of their lifetime at this stage, fusing hydrogen to produce helium near t ...
Feb 2016 - Sudbury Astronomy Club
Feb 2016 - Sudbury Astronomy Club

... known objects that orbit beyond Neptune. They say there’s only a 0.007% chance, or about one in 15,000, that the clustering could be a coincidence. Instead, they say, a planet with the mass of 10 Earths has shepherded the six objects into their strange elliptical orbits, tilted out of the plane of t ...
What`s In Outer Space?
What`s In Outer Space?

... • Saturn is the 6th planet from the sun. • Saturn is the 2nd largest planet in the solar system. • Saturn’s day is only 10 hours and 39 minutes long. • Saturn is so dense that if a large enough ocean could be found, it would float in it. • Saturn has rings around it that make it very beautiful. ...
THE MEDIEVAL ARISTOTELIAN WORLD VIEW Some
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... wind) move towards their natural places (natural motions). Earth (still in the centre) ...
CEEES/SC 10110/20110 Planet Earth Our Place in the Universe
CEEES/SC 10110/20110 Planet Earth Our Place in the Universe

... The next four planets are much larger = Gas Giant (Outer) Planets (H & its compounds; CH4, H2O, NH4). ...
Diapositiva 1
Diapositiva 1

... brightest stars, grouped in the famous Big Dipper asterism, are visible throughout the year in the northern hemisphere. Ursa Minor is a constellation of the northern sky. It is especially known because within it lies the north celestial pole, although its position is subject to a continuous, slow mo ...
Space and planets
Space and planets

... the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune. Together, these four planets are sometimes referred to as the Jovian planets. The planet was known by astronomers of ancient times and was associated with the mythology and rel ...
chapter4 - Empyrean Quest Publishers
chapter4 - Empyrean Quest Publishers

... directly proportional to its mass and acceleration) the principle of action and reaction: whenever one body exerts a force on a second body, the second body exerts an equal and opposite force on the first ...
BBC NEWS 15 July 2015 PLUTO: What jhave we learnt so far? Now
BBC NEWS 15 July 2015 PLUTO: What jhave we learnt so far? Now

... Is Pluto another red planet? The initial image released by Nasa had a reddish hue, something that scientists have long known. It's very different from the other red planet, Mars, in that the colour of the more distant, tiny world is likely caused by hydrocarbon molecules called tholins, that are for ...
The Planets in our Solar System
The Planets in our Solar System

... Solar System Basics • Our solar system is not only made of the Sun, the nine planets and their satellites, but also asteroids and comets. • All celestial bodies revolve around the sun. ...
7La – Observing the sky/A place near the Sun
7La – Observing the sky/A place near the Sun

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Document

... The rocky inner planets (Mercury, Venus, Earth and Mars) are called the terrestrial planets. The gaseous outer planets (Jupiter, Saturn, Uranus and Neptune) are the Jovian planets. An asteroid belt lies between the inner and outer planets. The outermost icy planet, Pluto, is in a class called Trans- ...
Beyond Pluto
Beyond Pluto

... planets on his bedroom wall. On it, Pluto was depicted as ―this crazy and very eccentric planet,‖ he says. ―It was everyone‘s favorite crazy planet.‖ Brown still recalls the mnemonic he learned for the names of the planets: Martha visits every Monday and—a for asteroids—just stays until noon, period ...
Click on image to content
Click on image to content

... revolving outside the orbit of Saturn and inside the orbit of Neptune. It is of the sixth magnitude, so that it is just visible to the naked eye. Uranus was accidentally discovered in 1781 by the British astronomer William Herschel. The planet was called Herschel in honour of its discoverer. The nam ...
The Solar System
The Solar System

... CBA Review ...
Uranus and Neptune are Comparable in Size
Uranus and Neptune are Comparable in Size

... places it between a star and the Earth. When this occurs, we refer to it as an occultation. During an occultation of a star by Uranus, the starlight intensity was noticed to decrease both before and after the planet’s disk crossed. This was due to the rings surrounding the planet. ...
Notes 21 Inner Solar System
Notes 21 Inner Solar System

... inner planets by their composition and general properties. Describe the relative size and famous features of each inner planet. ...
Powerpoint
Powerpoint

... Interplanetary Matter: Comets Comets are icy, with some rocky parts. The basic components of a comet ...
Size of Sun and Size of Planets
Size of Sun and Size of Planets

... 1. On which planet would you weigh the most? _______________________ 2. Why do you think this is true? ______________________________________ 3. On which planet(s) would you weigh the least? __________________________ 4. Why do you think this is true? _______________________________________ Conclusi ...
What do we see in the night sky - Laureate International College
What do we see in the night sky - Laureate International College

... the North Star – ____________ - which seems to stay fixed in place while others move around it. How to find Polaris? We can use _________________ – patterns formed by other stars Polaris is the last star in the handle of ______________ (Little Bear), Little Dipper. Constellations that circle around ...
Astronomy powerpoint
Astronomy powerpoint

... What is the name of stars that are super BIG, very bright and sometimes explode into events called ...
ASTRO REVIEW 14
ASTRO REVIEW 14

... _____ 9. What theory states that the universe began in a violent explosion? a. Doppler effect b. big crunch c. big bang d. Hubble’s law 10. Compare and contrast the geocentric and the heliocentric models of the universe. ...
Solar System
Solar System

... “Superior” planets A “superior” planet is one who’s orbit is outside the earth’s orbit. The superior planet moves slower around its orbit than the earth since it is further from the sun and so has to move slower to prevent it from escaping out into space. The diagram on the next slide is from the p ...
Unit 2. The planets in the Solar System The Solar System: Consists
Unit 2. The planets in the Solar System The Solar System: Consists

... bodies bound by gravity that move around the Sun. The bodies include planets, dwarf planets, satellites and another small bodies. Among the planets, we can distinguish between the inner and the outer planets: ...
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IAU definition of planet



The definition of planet set in Prague in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which: is in orbit around the Sun, has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and has ""cleared the neighborhood"" around its orbit.A non-satellite body fulfilling only the first two of these criteria is classified as a ""dwarf planet"". According to the IAU, ""planets and dwarf planets are two distinct classes of objects"". A non-satellite body fulfilling only the first criterion is termed a ""small Solar System body"" (SSSB). Initial drafts planned to include dwarf planets as a subcategory of planets, but because this could potentially have led to the addition of several dozens of planets into the Solar System, this draft was eventually dropped. The definition was a controversial one and has drawn both support and criticism from different astronomers, but has remained in use.According to this definition, there are eight planets in the Solar System. The definition distinguishes planets from smaller bodies and is not useful outside the Solar System, where smaller bodies cannot be found yet. Extrasolar planets, or exoplanets, are covered separately under a complementary 2003 draft guideline for the definition of planets, which distinguishes them from dwarf stars, which are larger.
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