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Glossary
Glossary

... a satellite closer to a planet. (p. 386) aeronautical—anything related to the science, design, or operation of aircraft. (p. 199) aft—the rear of a spacecraft or any other ship. (p. 309) air lock—an airtight chamber, usually located between two regions of unequal pressure, in which air pressure can ...
Day-6
Day-6

... The Law of Inertia An object in straight line uniform motion will continue that motion unchanged unless some external force acts on it ...
Homework #3 Solutions
Homework #3 Solutions

... What do we conclude if a planet has few impact craters of any size? If we do not see many impact craters of any size, then there must be some sort of geological process erasing the craters (c). All of the bodies in our solar system underwent a period of heavy bombardment early in their formation – s ...
Document
Document

... up the nucleus at the center of an atom. Electrons (negatively charged particles) are found relatively far from the nucleus. – If the nucleus were the size of a grape, the closest electrons would orbit at a distance about the length of a football field. – Most “solid” matter, then, is made up of mos ...
ASTRONOMICAL PARAMETERS OF THE EARTH AND THE SUN
ASTRONOMICAL PARAMETERS OF THE EARTH AND THE SUN

... in twenty-four hours, from West to East. If the earth is considered stationary, the whole celestial sphere along with its celestial bodies like the stars, sum, moon etc. appear to revolve round the earth from East to West. The axis of rotation of earth is known as the polar axis, and the points at w ...
Final Review - PCHS SCIENCE
Final Review - PCHS SCIENCE

... similar - although it looks to our eyes like it is just one color, it is actually made up of many different colors. The spectra that we see coming from stars often contain what look like dark lines at particular colors, which means there is much less light coming from the star at that color than at ...
Benchmark One Study Guide: Science Benchmark Wed
Benchmark One Study Guide: Science Benchmark Wed

... 2. How do the inner or terrestrial planets differ from the outer planets in terms of composition (what the planets are made up of) and size? The terrestrial planets are all solid rocky planets that are very close to the Sun. The outer planets are gas giants and are spread far apart, and are far from ...
AIM: HOW DO STARS FORM?
AIM: HOW DO STARS FORM?

... • Other stars are so far away that they look like points of light. • There are huge distances between stars. ...
Jupiter`s Galilean Moons
Jupiter`s Galilean Moons

... earth is still elliptical, its tidal bulge wobbles a little over the course of each month. This is a very small effect. For the case of Io orbiting Jupiter at a very close orbital radius, the tidal forces are enormously greater than the earth induces on the Moon, which is only a little smaller than ...
Article - Iowa State University
Article - Iowa State University

... Milky Way there are as many as 100,000 stars in one cubic light-year. In our part of the galaxy, there isn’t even another star within four light-years. If you were traveling in a spaceship at 10 miles per second (36,000 miles per hour) it would take you 70,000 years to get to the next closest one. C ...
Revision sheet Q3
Revision sheet Q3

... ------is what the air outside is like. ------- clouds are puffy and tall. ---------clouds are puffy ,small and white ---------clouds are wispy and thin ---------clouds are flat and gray ...
Lecture 2 : Early Cosmology
Lecture 2 : Early Cosmology

... 3.  The Earth and planets revolve around the Sun. 4.  The distance from the Earth to the Sun is imperceptible compared with the distance to the stars. 5.  The rotation of the Earth accounts for the apparent daily rotation of the stars. 6.  The apparent annual cycle of movements of the Sun is caused ...
Celestial Sphere, Celestial equator, N
Celestial Sphere, Celestial equator, N

... The earth’s daily rotation makes the stars appear to rotate around us. Because we only see half the celestial sphere at any one place, this simple rotation of the stars looks more complicated and actually makes it appear that stars rise and set. The set of stars that rise and set varies with locatio ...
Time
Time

... • What Time Is It? Before 1884, almost every town in the world kept its own local time. There were no national or international conventions which set how time should be measured, or when the day would begin and end, or what length an hour might be. However, with the vast expansion of the railway and ...
Motion in the Sky & Getting to know the Sky
Motion in the Sky & Getting to know the Sky

... therefore it appears very small in the sky. Venus is in the “new” phase when it is at its closest distance to the earth, so the “narrow crescent” Venus looks very large (and very bright)! ...
THE STAR - physics.udel.edu
THE STAR - physics.udel.edu

... contemporaneous Persian figure.[2] The two other notably bright stars in Cassiopeia are both variable stars. Gamma Cassiopeiae is a shell star, a type of variable star that has a very high rate of rotation. This causes the star to be somewhat unstable and periodically eject rings of material. ...
NGSS Alignment - University of Louisville
NGSS Alignment - University of Louisville

... • The  sun  is  a  star  that  appears  larger  and  brighter  than  other  stars  because  it  is  closer.  Stars  range  greatly  in  their   distance  from  Earth.  (5-­‐ESS1-­‐1)   • The  orbits  of  Earth  around  the  Sun  and ...
Astronomy 360 - Indiana State University
Astronomy 360 - Indiana State University

... Absolute Magnitude is defined as how following. Magnitude Difference of 1 is 2.512:1, 2 is 2.5122:1 or 6.31:1, 3 is 2.5123 = 15.85:1 etc. ...
Eclipse PowerPoint
Eclipse PowerPoint

... has an atmosphere. The outer layer of the Sun’s atmosphere is called the corona. Because the sun is so bright, it is not visible unless the Sun’s surface is blocked out during an eclipse. ...
Pluto
Pluto

... • Meteoroids are chunks floating through the Solar System, not in the asteroid belt. • Most are small (< 10 m). They probably come from the asteroid belt produced by collisions • When enter atmosphere of the Earth (<100 km), they burn due to friction. This makes a METEOR (“shooting star”). Mostly li ...
CT9
CT9

... returning to A. The work done by the force of gravity during this orbit is: A: zero ...
Document
Document

... Astronomical distances are so large that we use the speed of light to measure them Mean Earth-Sun Distance – 150 million Km = 1 Astronomical Unit (AU) = 8.3 Light Minutes 1 Light Year (Ly) = 9.5 trillion Km = 63,240 AU Parsec = 3.26 Lys (parallax angle unit) ...
Lecture 1: The Universe: a Historical Perspective
Lecture 1: The Universe: a Historical Perspective

... for (1) Earth's obliquity relative to the ecliptic and (2) length of the year ● key importance for preserving Greek thought ● many star names are Arabic (e.g. Deneb, Algol, ...
Gravitation - Galileo and Einstein
Gravitation - Galileo and Einstein

... on top of it, does the small stone press on the large one? • His reply: One always feels the pressure upon his shoulders when he prevents the motion of a load resting upon him; but if one descends just as rapidly as the load would fall how can it press upon him? Do you not see that this would be the ...
Earth`s Motions
Earth`s Motions

... appear to move in circles against the space-fixed backdrop of stars – the position of the Earth in its orbit around the Sun at the solstices, equinoxes, or other time defined relative to the seasons, slowly changes http://earthobservatory.nasa.gov/Features/Milankovitch/Images/milankovitch_precess_hi ...
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Extraterrestrial skies



In astronomy, the term extraterrestrial sky refers to a view of outer space from the surface of a world other than Earth.The sky of the Moon has been directly observed or photographed by astronauts, while those of Titan, Mars, and Venus have been observed indirectly by space probes designed to land on the surface and transmit images back to Earth.Characteristics of extraterrestrial skies appear to vary substantially due to a number of factors. An extraterrestrial atmosphere, if present, has a large bearing on visible characteristics. The atmosphere's density and chemical composition can contribute to differences in colour, opacity (including haze) and the presence of clouds. Astronomical objects may also be visible and can include natural satellites, rings, star systems and nebulas and other planetary system bodies.For skies that have not been directly or indirectly observed, their appearance can be simulated based on known parameters such as the position of astronomical objects relative to the surface and atmospheric composition.
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