'North celestial pole' diaporamas de présentation

The Solar System 1 star 9 8 planets 63 (major) moons asteroids, comets, meteoroids The distances to planets are known from Kepler’s Laws (once calibrated with radar ranging to Venus) How are planet sizes determined? Measure angular size on sky, Then use geometry…..

The Solar System. 1 star 9 8 planets 63 (major) moons asteroids, comets, meteoroids. The distances to planets are known from Kepler’s Laws (once calibrated with radar ranging to Venus). How are planet sizes determined? Measure angular size on sky, Then use geometry….

The Sky. Edward M. Murphy Space Science for Teachers 2005. Horizon and Zenith. It is sometimes useful to think of the sky as a great dome over our heads. The horizon is where the dome meets the Earth. The zenith is the point directly overhead.

The ancients thought the stars were motionless and fixed to the firmament, unimaginably far, far away…. Motions of and Distances to Stars: Chapter 17 and 19. How can you guess the distance to stars?. Review: Angles. sin = opposite hypotenuse. cos = adjacent

Observing the Sky. The Birth of Astronomy. Pre-Historic Astronomers. Need for Astronomy. Predicting seasons enables Survival Migration Store food (like squirrels) Plant crops in spring (after last frost?) Predict seasonal flooding Knowing time of day enables Survival

THE UNIVERSE. Ancient ideas. Introduction Motion of the moon and the stars was observed by ancient civilizations. These cycles became associated with certain yearly events. (A) This photograph shows the path of stars around the North Star.

The Sky. Edward M. Murphy Space Science for Teachers 2005. Horizon and Zenith. It is sometimes useful to think of the sky as a great dome over our heads. The horizon is where the dome meets the Earth. The zenith is the point directly overhead.

Celestial Sphere. Imagine the sky as a hollow sphere The stars are attached to this hollow sphere, they rise in the east and set in the west The Sun, Moon and the planets wander on this sphere Celestial Sphere Very convenient But why spherical?? Pythagoras-> Shadow of the Earth.

Chapter 1: The Cycles of the Sky. Constellations help astronomers know the positions of celestial objects. Zodiac signs. These coordinates can be used to describe the position of stars locally. zenith. Altitude. Azimuth. Angular distances of stars are measured in degrees.

IS1101 Nothing to Something. Mr Goh Hock Leong. Content. Celestial Sphere declination, right ascension vernal equinox, autumnal equinox, winter solstice & summer solstice celestial poles, celestial equator, ecliptic Seasons. Movement of Earth.

Green Bank Laser Rangefinders. Richard Prestage on behalf of PTCS Team. FAST Presentation, 22 July 2010. LRF Overview. Project conceived in early 1990s, as an integral part of GBT Development. Requirement was for ~ 100µm ranges over ~ 100m distance. No commercial technology available.

Where am I?. The Prime Meridian is a real, physical feature marked out in Greenwich, England. Nautical Charts give: Depth information location of submerged hazards geographic features latitude and longitude. Lambert Cylinder Equal Area Projection . Harbor Buoys:. Entering – Green on left

Lisa Blair PHY 489.02 May 4, 2011. Bad Astronomy Teacher Presentation. 3 Preconceptions We experience seasons because of the earth’s changing distance from the sun The earth’s revolution around the sun causes day and night All stars rise and set.

Apparent Motion. What is apparent motion?. Important to understand what we see and what is actually happening. Apparent motion is what we see from Earth Actual motion is what is really happening

Sun - Major Misconceptions. The Sun orbits around the Earth during the course of the day. Seasons are caused by the Earth’s changing distance to the Sun. The Sun will be directly over your head at noon during the summer. The Sun will always rise/set due east/west as seen from Iowa. The Sun.

EQ:What are some historical observations of the sky and concluding theories?. Who has been observing our sky and for how long?. Stonehenge 2300 BC. Sumerian star catalogue 1200 BC. Chinese Calendar 1400 BC. Mayan culture 1500 BC – 900 AD. “Planetarium” Cave in SW U.S. More Astronomers.

Today! From Earth’s Perspective: A. Celestial Coordinates B. Precession of the equinoxes C. Astrology?. The Celestial Sphere (Pythagoras) FROM NOTES Celestial sphere - -imaginary sphere on which the 'fixed stars' are located

The Celestial Sphere. (The sphere should really be rotating, not Earth). An Ancient Greek Idea. Imagine the universe to be a hollow sphere with the Earth at the center The Celestial Sphere Idea based upon how things _________ to be The pattern of stars in the sky ________________

Terrestrial Coordinates (useful for specifying locations on the surface of the Earth). Longitude -- East/West Coordinate -- 0  at the Prime Meridian (the Great Circle through Greenwich England) -- increases to either 180 E or 180 W at the International Date Line

The Motions of the Earth. Evidence of Movement and the Consequences. How do we know that the Earth is Round?. First, the sky is curved. This is a reflection of the Earth’s curvature. We can see the Earth’s shadow during a lunar eclipse.