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The Naked Eye Stars as Data Supporting Galileo`s
The Naked Eye Stars as Data Supporting Galileo`s

... would support Galileo's ideas regarding the stars being suns scattered through space. Data on the numbers of visible stars brighter than a given magnitude are given in Figure 3.10 ...
$doc.title

... 4.  How  long  would  it  take  the  planetary  nebula  to  expand  outside  of  the  solar  system?  Show  your  work  and  give  your   answer  in  years.  (Note,  the  solar  system  is  about  80  AU.)   ...
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera

... projected along the line of sight. The area is dominated by the Rosette Nebula—a large low-density cloud of glowing ionized hydrogen in which star formation has recently taken place. The young massive stars recently formed within Rosette emit vast amounts of ultraviolet light, ionizing and heating ...
Chapter 2 Surveying the stars 2.1 Star magnitudes
Chapter 2 Surveying the stars 2.1 Star magnitudes

to get the file
to get the file

... The image is nearly overtaken by the sun in a mere five minutes after the first picture •The solution to the transmittance problem was to attach a variable polarizing lens to the telescope ...
Neutron Star
Neutron Star

... Some pulsars have planets orbiting around them. Just like in binary pulsars, this can be discovered through variations of the pulsar period. As the planets orbit around the pulsar, they cause it to wobble around, resulting in slight changes of the observed pulsar period. ...
Chapter 4
Chapter 4

... – Gamma-ray astronomy began in 1965 – By 1970s, gamma rays found to be coming from familiar objects: Milky Way center and remnants of exploded stars – 1967 gamma-ray bursts from space discovered by military satellites watching for Soviet nuclear bomb explosions – Source of gamma-ray bursts is likely ...
The Milky Way - National Tsing Hua University
The Milky Way - National Tsing Hua University

... Some pulsars have planets orbiting around them. Just like in binary pulsars, this can be discovered through variations of the pulsar period. As the planets orbit around the pulsar, they cause it to wobble around, resulting in slight changes of the observed pulsar period. ...
The Relationship Between a Star`s Brightness and its Distance
The Relationship Between a Star`s Brightness and its Distance

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Stellar Magnitudes & Distances
Stellar Magnitudes & Distances

Star Formation
Star Formation

... • Dark nebula are usually molecular clouds • Molecular clouds are relatively dense and are very cold, often only 10 K. • Giant molecular clouds can contain as much as 104 solar masses (M) of gas and be 10 light years across. • Molecular clouds are the primary sites for star formation. ...
How Close is our Nearest Neighbor
How Close is our Nearest Neighbor

Star formation PowerPoint
Star formation PowerPoint

... gravity is balanced by the outward pressure from the core. The star is now on the main sequence • More massive stars follow the same process, but more ...
Stars and Planets - The University of Texas at Dallas
Stars and Planets - The University of Texas at Dallas

... The Pleiades is a famous cluster of young stars visible in the constellation Taurus. When most of the gas and dust is gone from a stellar nursery, the young stars are in an open cluster. One day these star systems will drift apart. Image source: http://antwrp.gsfc.nasa.gov/apod/ap021201.html ...
Structure of the solar system
Structure of the solar system

... If you can visually see two stars they are called “visual binaries”, if not they are “spectroscopic binary” (more on that later) and they can also be “eclipsing binary” if one eclipses the other during its orbit. ...
11/17/2011 1 Ch. 27 Notes: Nebular Hypothesis The Nebular
11/17/2011 1 Ch. 27 Notes: Nebular Hypothesis The Nebular

... • A rotating cloud of gas and dust condensed to form the sun and surrounding planets. ...
Today in Astronomy 102: electron degeneracy pressure and white
Today in Astronomy 102: electron degeneracy pressure and white

... Theory of white dwarfs Fowler applied his theory of degeneracy pressure, soon after he invented it (1926), to white dwarf stars. His result: q Stars supported by degeneracy pressure instead of gas pressure would have sizes close to that determined from astronomical observations of Sirius B. Soon th ...


... of the nebula in which the metal grains grew. By dividing the temperature interval (100 oC) by the growth time (19 days, or 456 hours), he found a cooling rate of 0.2 oC per hour. This is substantially slower than the cooling rates of CAIs and chondrules (with a few exceptions). Meibom and coworkers ...
test - Scioly.org
test - Scioly.org

... 7) A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of neutron-degenerate matter. 8) The density of a White dwarf is 1 × 109 kg/m3 . Therefore the specific gravity of White Dwarf material is 10,000 SG. 9) A blackbody refers to an opaque object that emits ultraviole ...
Astronomy 328 Midterm Exam - Department of Physics and Astronomy
Astronomy 328 Midterm Exam - Department of Physics and Astronomy

PPT 15MB - HubbleSOURCE
PPT 15MB - HubbleSOURCE

...  Amazing network of long, straight filaments seen in great detail for first time in ionized gas; some of them follow magnetic field lines;  New compact nebulae discovered with young massive stars, ranging from early to late stages of star formation  Many candidate massive stars identified by brig ...
the rest of the univ..
the rest of the univ..

... extremely faint Kuiper Belt objects (left). The objects are very small and faint perhaps only 20 km or so across. There may be as many as 100 million such comets in low-inclination orbits and shining brighter than the HST's magnitude-28 limit. (A follow-up HST observation failed to confirm this obse ...
ph507lecnote07
ph507lecnote07

... Also known as Alpha Canis Majoris, Sirius is the fifth closest system to Sol, at 8.6 light-years. Sirius is composed of a main-sequence star and a white dwarf stellar remnant. They form a close binary, Alpha Canis Majoris A and B, that is separated "on average" by only about 20 times the distance fr ...
High-Speed Ballistic Stellar Interlopers
High-Speed Ballistic Stellar Interlopers

... approach between two binary star systems—or a binary system and a third star. In such cases, one or more of the stars can pick up enough energy through gravitational interaction with the others to be thrown from the system. Determining how many stars have been ejected from their neighbors is importa ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
AST 301 Introduction to Astronomy - University of Texas Astronomy

... How were the atoms in your body made? The hydrogen atoms (or the protons and electrons they are made of) were made in the big bang. Many of the helium atoms in the Universe were also made in the big bang. The other atoms were made inside of stars or during explosions of stars. When the Sun becomes ...
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Cygnus (constellation)



Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.
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