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This article is not part of the regular textbook.

The rotation curve and the existence of the dark matter halo, stellar populations, and the galactic center are photlgraphy discussed.

Note that Google search will first show several tsxtbook sites before it lists the relevant Astronomy Notes pages. I discuss Olbers’ Paradox, the cosmic microwave background radiation, the fate of the universe open or closeddark matter, dark energy, inflation, and the cosmological constant.

View animation of cover. I define angular momentum and give several examples of angular momentum in astronomy: The dangers of selection effects and biased samples are also discussed with the application of finding what a typical star is like. Appendices Angular Momentum in Astronomy. As a testament to the value of this material, numerous copies of this material in various stages dowhload revision are found all over the web.

Astronomy Notes

The Sun and Stellar Structure. Mars discussion now includes proofs for liquid water in past and sub-surface water ice. Beautiful Planet photo album of nature photography has imagery of mountains, lakes, streams, waterfalls, large trees, flowers, aurorae, other landscape images and some images of insects and frogs. Lives and Deaths of Stars.

Newton’s laws of motion and his law of gravity are discussed.

All of the line drawings were done with Create on my old NeXT machine or with Freehand on a wintel laptop and Macintosh at home. This chapter covers cosmology: Answers to Global Warming Skeptics is a separate section about the climate change debate going on among the general public.

National park photo sets include: Covers refractors, reflectors, radio telescopes, light-gathering power, resolving power, interferometers, magnification, and atmospheric distortion such as seeing, reddening, and extinction.

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The concept of hydrostatic equilibrium is used to explain the mass-luminosity relation and the reason for the mass cut-off at the high and low ends. Newton’s Law of Gravity. Other documents on Astronomy Notes about fake science and news: Astronomy as a Science and a Sense of Scale.

I introduce astronomy’s place in science, and give a sense of the size and time scales involved. Life Beyond the Earth. Also discussion of the scientific method and how astrology is not a science and what makes astronomy a science. If you have comments about these notes, please email me.

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This site also has pages giving angular momentum examples, a quick mathematics review, improving teztbook skills, astronomy tables, and astronomy terms. A separate section about the Science-Religion interface and interaction is available on this site. Also, is a short “How I Know” PDF tfxtbook with embedded links explaining why I accept the conclusion that Earth’s climate is changing and that humans play a roleā€”just one sheet of paper needed to print. This website is offered to the net as a resource in astronomy education.

Astronomy Without a Telescope. Astronomy constants, physical constants, planets orbital properties, physical characteristics, atmospheresnearest stars, and brightest stars as seen from the Earth.

Purchase the Astronomy Notes book! They are copyrighted by Nick Strobel. Notes for the properties of stars and how we determine them. If you find an old copy, please let the website manager know of the official Astronomy Notes website at www.

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Definitions of astronomy terms used in this website. Applications of those laws esp. Also, the structure of donwload Milky Way Galaxy, our place in it, and how we determine these things.

Currently these notes cover: The Interstellar Medium and the Milky Way. Things like distances to stars, their masses, radii, composition and speeds. Most images are from pfd western United States but some are also from eastern Australia and the aurorae are from Fairbanks, Alaska. Also HR diagram, spectral types, and spectroscopic parallax. I discuss the celestial sphere, motions of the Sun solar and sidereal days, time zones, equation of time, and seasonsmotions of the Moon phases and eclipses, including my phktography pictures of some solar eclipsesand planetary motions.

The rest of the album are from various beautiful places in the western United States and eastern Australia.