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stars - acpsd
stars - acpsd

... sequence and expand to form red giants. With this new stage, the fusion of helium begins to form heavier elements like Oxygen and Carbon. This process of expansion- collapse-expansion of stars forms the light elements present in the universe (up to Fe). Life in the Suburb: a Main Sequence Star. Main ...
30 Doradus - HubbleSOURCE
30 Doradus - HubbleSOURCE

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... where stars spend the majority of their life and where they convert H into He. ...
classifying stars
classifying stars

Constellation Classification Cards*
Constellation Classification Cards*

... 7. Family members can live nearby or farther away. Again, begin the U-shape in the front left corner of the room, starting with the closest stars. Ask the students with distances less than 25 light-years to start the line. If 20 cards are used, there should be one student representing 8.3 light-minu ...
The Properties of Stars Early in its history, the universe organized
The Properties of Stars Early in its history, the universe organized

... Stars are not scattered evenly over the H-R diagram; instead, they tend to appear in groups. One such group runs from the lower-right-hand corner (cool, lowluminosity stars) to the upper-left-hand corner (hot, high-luminosity stars). This should seem quite reasonable; in general, stars with hotter s ...
MAIN SEQUENCE STARS, Red Giants and White Dwarfs
MAIN SEQUENCE STARS, Red Giants and White Dwarfs

... • 16O + 4He  20Ne +  • 20Ne + 4He  24Mg +  • We’ll come back to this type of onion-layer model star when we talk about supernova explosions and neutron stars. • The elements cooked here are needed for life ...
Pop Quiz Question
Pop Quiz Question

Spectral Classification of Stars
Spectral Classification of Stars

Stellar Evolution
Stellar Evolution

$doc.title

... We now introduce the concept of proper motion, as stellar positions change through both parallax and proper motion, and astrometric programs seek to measure both of these.. Since stars move around with random motions within our Galaxy as well as rotate around its center, there are two components to ...
Stellar Populations of Galaxies- 2 Lectures H
Stellar Populations of Galaxies- 2 Lectures H

stellar spectra instructor notes
stellar spectra instructor notes

Stellarium01 Starter Part A B Doc - ASTR101
Stellarium01 Starter Part A B Doc - ASTR101

... Start Stellarium. Use “Current Location” listed above by going to the Icon Bar at the left-hand side of the screen and find the Location window icon (shortcut key= “F6”, in some linux it is fn-f6) and click on it. Scroll through the list of locations in the window until you find the current location ...
9J Gravity and Space
9J Gravity and Space

... system was set up more than two thousand years ago, the sun's path was divided into twelve equally spaced "signs," each 30 degrees wide. ...
Leo Powerpoint
Leo Powerpoint

... death and using one of his claws tore away his skin, which he later used as an impermeable armor on his body for the remaining 11 tasks that he had to complete. As Hercules came out successful in his first labor, his step mother was furious but she couldn't have undone what Hercules had done. She st ...
31-2 - Fremont Peak Observatory
31-2 - Fremont Peak Observatory

... Just east of λ-Scorpii is the third magnitude star GScorpii. G-Scorpii is interesting because just 4 ½ arc minutes east of G-Scorpii is the globular cluster NGC -6441. NGC-6441 is an 8th magnitude globular about 35,000 light years from the earth. In a small telescope at low power or binoculars the G ...
Publisher: Emily Barrosse Acquisitions Editor: Kelley Tyner
Publisher: Emily Barrosse Acquisitions Editor: Kelley Tyner

... Though the details can differ, all stars containing less than about ten times the Sun’s mass will have the same fate. As fusion exhausts the hydrogen in their centers, their internal pressure will diminish. Gravity will pull the core in, and the core will heat up again. Hydrogen will begin “burning” ...
Stellar Continua
Stellar Continua

... I. The Paschen Continuum • The Paschen continuum slope (B-V) is a good temperature indicator • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K ...
The Star Finder Book - Starpath School of Navigation
The Star Finder Book - Starpath School of Navigation

... After teaching celestial navigation to over 3,000 students during the past 6 years, we have well learned the recurring questions. We especially appreciate questions and comments of former students after they navigate their first ocean crossing. Comments from new navigators are invaluable to the deve ...
An interesting nebular object in LDN 288
An interesting nebular object in LDN 288

... (b in Fig.5b). There is another star with a jet in its vicinity (object c in the Fig.5b). c. SNO 69 [3] (see Fig.5c). This looks like a trapezium-like system, consisting of four stars. There are spiral jets, at the ends of which there are condensations. It seems that not only the jets, but also the ...
General Astronomy - Stockton University
General Astronomy - Stockton University

... We may imagine the enormously complicated situation of changing things we call the physical universe is a chess game played by the gods; we are not permitted to play, but we can watch. Our problem is that we are left to puzzle out the rules of the game for ourselves as best we can by watching the pl ...
THE PHYSICAL CHARACTERIZATION OF THE STARS 1
THE PHYSICAL CHARACTERIZATION OF THE STARS 1

... of the physical stellar parameters, the current state of the knowledge and the future perspectives. We do not pretend to be complete, but to list the most used approaches. ...
interactive.hr.diagram
interactive.hr.diagram

... H-R Diagram Internet Activity Go to the following website to answer the following questions: http://www.wwnorton.com/college/astronomy/astro21/demo/_animations/hr_diagram.swf To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal a ...
Lecture 12
Lecture 12

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Corona Borealis

Corona Borealis /kɵˈroʊnə bɒriˈælɨs/ is a small constellation in the Northern Celestial Hemisphere. It is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Its brightest stars form a semicircular arc. Its Latin name, inspired by its shape, means ""northern crown"". In classical mythology Corona Borealis generally represented the crown given by the god Dionysus to the Cretan princess Ariadne and set by him in the heavens. Other cultures likened the pattern to a circle of elders, an eagle's nest, a bear's den, or even a smokehole. Ptolemy also listed a southern counterpart, Corona Australis, with a similar pattern. The brightest star is the magnitude 2.2 Alpha Coronae Borealis. The yellow supergiant R Coronae Borealis is the prototype of a rare class of giant stars—the R Coronae Borealis variables—that are extremely hydrogen deficient, and thought to result from the merger of two white dwarfs. T Coronae Borealis, also known as the Blaze Star, is another unusual type of variable star known as a recurrent nova. Normally of magnitude 10, it last flared up to magnitude 2 in 1946. ADS 9731 and Sigma Coronae Borealis are multiple star systems with six and five components respectively. Five star systems have been found to have Jupiter-sized exoplanets. Abell 2065 is a highly concentrated galaxy cluster one billion light-years from our Solar System containing more than 400 members, and is itself part of the larger Corona Borealis Supercluster.
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