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Newton`s Law of Universal Gravitation
Newton`s Law of Universal Gravitation

... 3. Suppose that two objects attract each other with a gravitational force of 16 units. If the mass of both objects was doubled, and if the distance between the objects remained the same, then what would be the new force of attraction between the two objects? 4. Suppose that two objects attract each ...
Plotting Supernova Light Curves
Plotting Supernova Light Curves

... the mass of the star, it either collapses to form a neutron star or, in the case of stars more than a hundred times the mass of the Sun, it forms a black hole. After the explosion, the star’s luminosity gradually decreases. A plot of how the luminosity of the star changes with time as all this happe ...
Stars - Mike Brotherton
Stars - Mike Brotherton

... The Deaths of Massive Stars: Supernovae Final stages of fusion in high-mass stars (> 8 Msun), leading to the formation of an iron ...
April 2014 - Bluewater Astronomical Society
April 2014 - Bluewater Astronomical Society

... March 6, 2014: NASA's Hubble Space Telescope has recorded the never-before-seen break-up of an asteroid into as many as 10 smaller pieces. Fragile comets, comprised of ice and dust, have been seen falling apart as they approach the sun, but nothing like this has ever before been observed in the aste ...
The Bigger Picture
The Bigger Picture

... only 0.01 arcseconds! • Space-based missions have taken over parallax measurements. A satellite called Hipparcos measured parallaxes for about 100,000 stars (pre-Hipparcos, this number was more like 2000 stars). ...
arXiv:astro-ph/0009259 v3 12 Dec 2000
arXiv:astro-ph/0009259 v3 12 Dec 2000

... enormous amounts of energy, thus increases the possible limit of the duration of life on this planet, and allows the time claimed by the geologist and biologist for the process of evolution. The discovery of radioactivity opened up the possibility that nuclear energy might be the origin of solar rad ...
How the Sun Shines
How the Sun Shines

... enormous amounts of energy, thus increases the possible limit of the duration of life on this planet, and allows the time claimed by the geologist and biologist for the process of evolution. The discovery of radioactivity opened up the possibility that nuclear energy might be the origin of solar rad ...
The Science of Astronomy
The Science of Astronomy

... Learning About Ancient Achievements  The study of ancient astronomical achievements is a rich field of research. Many ancient cultures made careful observations of planets and stars, and some left remarkably detailed records. The Chinese, for example, began recording astronomical observations at lea ...
Basic Properties of Stars
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6.1 Introduction

... natural broadening of the line. The equivalent width can then grow again, as the line develops characteristic ‘damping wings’ [where the absorption coefficient falls off as the inverse square of (λ − λ0 )]. Before proceeding, a note of clarification is required here. The above treatment is strictly ...
Power Punt on Binary Asteroids
Power Punt on Binary Asteroids

... Lightcurves of asteroids • Asteroids spin (typically in 8 hours) and as they spin, they change brightness as we see more or less reflected sunlight • By measuring lightcurves (brightness vs time) from different viewing angles, can get 3dim shape of asteroid • Binary asteroids show additional “bumps ...
TAP 704- 8: The ladder of astronomical distances
TAP 704- 8: The ladder of astronomical distances

... The prestigious meeting of the International Astronomical Union in 1976 was startled to be told that the Universe is only half as big as the astronomers present all thought, and therefore only half as old. The challenger was the French-American astronomer Gerard de Vaucouleurs; the leader of the cha ...
Distance - Fixed Earth
Distance - Fixed Earth

... catalog of objects having very large redshifts shows that among 109 quasi-stellar objects, in which both absorption and emissions lines could be measured, the value of the absorption redshift in a given object, is always different from the one measured in emission for the same object. It is clear th ...
stars and beyond - Math/Science Nucleus
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... main stars of each hemisphere. It is divided into 88 regions called constellations. The purple band that runs around the globe is the Milky Way Galaxy. The dotted line within this band is the galactic equator. There is a second smaller purple area in the southern hemisphere between 5h and 6h, at -70 ...
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STELLAR STRUCTURE AND EVOLUTION
STELLAR STRUCTURE AND EVOLUTION

Lecture 2
Lecture 2

31-2 - Fremont Peak Observatory
31-2 - Fremont Peak Observatory

http://hcs.harvard.edu/~jus/0302/bester.pdf
http://hcs.harvard.edu/~jus/0302/bester.pdf

Comets
Comets

... cloud, far from the Sun. (4) A comet or asteroid impact may have caused the extinction of dinosaurs. ...
Pathways to Astronomy/Space
Pathways to Astronomy/Space

... Many visible changes to the old science curriculum are evident, but the most obvious difference is the layout of ordering of the expectations. Previously, the Relating Science to Technology, Society and the Environment (STSE) expectations were listed at the end of the strand’s expectations, but are ...
Stars in Their Youth
Stars in Their Youth

... is that they are converting hydrogen into helium in their cores. In the Chap. 1 we outlined the extraordinary conjecture by Eddington. But it took nearly twenty years to work out the details. The first breakthrough in solving the problem of how stars liberate energy came in 1938 when C. F. von Weizs ...
File - Mr. Catt`s Class
File - Mr. Catt`s Class

... formed red giant will result in the formation of an accretion disk around the white dwarf. The material in the disk comes from the red giant and is mostly hydrogen. 2. An accretion disk is a rotating disk of gas orbiting a star, formed by material falling toward the star. ...
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Theoretical astronomy

Theoretical astronomy is the use of the analytical models of physics and chemistry to describe astronomical objects and astronomical phenomena.Ptolemy's Almagest, although a brilliant treatise on theoretical astronomy combined with a practical handbook for computation, nevertheless includes many compromises to reconcile discordant observations. Theoretical astronomy is usually assumed to have begun with Johannes Kepler (1571–1630), and Kepler's laws. It is co-equal with observation. The general history of astronomy deals with the history of the descriptive and theoretical astronomy of the Solar System, from the late sixteenth century to the end of the nineteenth century. The major categories of works on the history of modern astronomy include general histories, national and institutional histories, instrumentation, descriptive astronomy, theoretical astronomy, positional astronomy, and astrophysics. Astronomy was early to adopt computational techniques to model stellar and galactic formation and celestial mechanics. From the point of view of theoretical astronomy, not only must the mathematical expression be reasonably accurate but it should preferably exist in a form which is amenable to further mathematical analysis when used in specific problems. Most of theoretical astronomy uses Newtonian theory of gravitation, considering that the effects of general relativity are weak for most celestial objects. The obvious fact is that theoretical astronomy cannot (and does not try) to predict the position, size and temperature of every star in the heavens. Theoretical astronomy by and large has concentrated upon analyzing the apparently complex but periodic motions of celestial objects.
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