'Angular diameter' presentation slideshows

Chapter 1

Chapter 1. Charting the Heavens The Foundations of Astronomy. Scale: relative size and distance units speed of light, distance, and time Measuring distance and size triangulation parallax angular measurement View from Earth celestial sphere constellations and the zodiac

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Astronomy 1100 Introduction to Astrophysics

Astronomy 1100 Introduction to Astrophysics.

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The Motion of the Planets

The Motion of the Planets. The planets are orbiting the sun almost exactly in the plane of the Ecliptic. Jupiter. Venus. Mars. Earth. Mercury. Saturn. The Moon is orbiting Earth in almost the same plane (Ecliptic). Inferior planets are visible only at small angular distances from the Sun.

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The Moon orbits the Earth and returns to the same right ascension every 27.32 days. (It moves eastward

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SOLAR ECLIPSE

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Cycles of the Moon

0. Note that the following lectures include animations and PowerPoint effects such as fly-ins and transitions that require you to be in PowerPoint's Slide Show mode (presentation mode). 0. Cycles of the Moon. Chapter 3. 0. Guidepost.

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Lightyears

Lightyears. a lightyear is a unit of interstellar space measurement. One l.y. (lightyear) is how far light will travel in one year. How far is that? Well if light travels 299,800 kilometers in 1 second and there are 31,560,000 seconds in a year that means in one year light can travel....

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Looking out at the Night Sky

Looking out at the Night Sky. What questions do you have?. Motions in the Sky:. How does the sun move during the day? How do stars move during the night? Does the motion of the sun change with the seasons? Does the sun set at the same point along the horizon (from the same location)?

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Astronomy and the Universe

Astronomy and the Universe. Chapter One. Some Guiding Questions. What methods do scientists use to expand our understanding of the universe? What makes up our solar system? What are the stars? Do they last forever? What are galaxies? What do astronomers learn by studying them?

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Observational Measurements Using Angles Ap parent vs. Actual Size and Distance

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Dynamite Diameters

Dynamite Diameters. Tabetha Boyajian GSU/CHARA Presented by Hal McAlister. Goals. To measure the angular diameter ( ? ) of a large sample of A, F, and G main sequence stars with the CHARA Array to better than 4% accuracy Establish effective temperatures to better than 2%

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WHY STUDY ASTROPHYSICS ?

Caroline Chisholm College Physics. ASTROPHYSICS. To gain an understanding of our universe and our role in it. Learn about how the universe operates --> modern science.

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GALAXIES

GALAXIES . Visible contents of the cosmos. Galaxies: Local or Distant?. Angular diameters span ratio of about 100 Angular diameter => actual diameter to distance ratio; large ratio => large distances Clincher: Cepheid variables in Andromeda galaxy (1922); 2 million ly!.

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Constraining Dark Energy from SNIa CMB BAO Observations

Constraining Dark Energy from SNIa CMB BAO Observations. Chien-Wen Chen. Distance Measures. Comoving distance Luminosity distance Angular diameter distance Comoving volume. http://www.astro.ufl.edu/~guzman/ast7939/projects/project01.html.

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Issues with the use of telescopes Long wavelength (Radio) Astronomy Resolution Revisited

Issues with the use of telescopes Long wavelength (Radio) Astronomy Resolution Revisited. Radio telescopes have relatively poor ability to resolve objects because of the long wavelength of the EM waves. Issues with the use of telescopes Resolution. ? (in ? m ). ? min (in arc sec) = .25.

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S U S I

The Pulsation of the Cepheid l Car Measured with SUSI J. Davis, M.J. Ireland, A. Jacob, J.R. North, S.M. Owens, J.G. Robertson, W.J. Tango, P.G. Tuthill. S U S I. Abstract

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