
The Magnitude scale
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
Chapter 25 PowerPoint
... Flares- violent eruptions of particles near sunspots. Solar Winds- particles ejected from the Sun’s corona. Bounce of the Earth’s atmosphere causing the auroras. ...
... Flares- violent eruptions of particles near sunspots. Solar Winds- particles ejected from the Sun’s corona. Bounce of the Earth’s atmosphere causing the auroras. ...
Astronomy Assignment
... ‘We are all just Star Stuff”- Carl Sagan, truer words have never been spoken. Every atom of our bodies was formed in the core of some long dead star. But how and where and why? In order to answer these questions we must understand the stars themselves and the clouds from which they arise and often a ...
... ‘We are all just Star Stuff”- Carl Sagan, truer words have never been spoken. Every atom of our bodies was formed in the core of some long dead star. But how and where and why? In order to answer these questions we must understand the stars themselves and the clouds from which they arise and often a ...
Spring 2014 Astronomy Exam Study Guide (Co-Taught)
... Use the H-R diagram to answer questions related to the following concepts: Location of stars based on their temperature, luminosity and size. Location and color of hottest and brightest stars Location and color of coolest and dimmest stars Life cycle of various stars Location of most star ...
... Use the H-R diagram to answer questions related to the following concepts: Location of stars based on their temperature, luminosity and size. Location and color of hottest and brightest stars Location and color of coolest and dimmest stars Life cycle of various stars Location of most star ...
B. protostar - University of Maryland Astronomy
... 23. A gigantic outburst of energy and particles occurred on the Sun this morning. Mrs. Deming was excited and told her ASTR 101 class to look for A. a full moon tonight. B. an eclipse. C. a meteor shower if it is clear. D. an aurora if it is clear. E. dangerous cosmic rays. 24. Which of the followi ...
... 23. A gigantic outburst of energy and particles occurred on the Sun this morning. Mrs. Deming was excited and told her ASTR 101 class to look for A. a full moon tonight. B. an eclipse. C. a meteor shower if it is clear. D. an aurora if it is clear. E. dangerous cosmic rays. 24. Which of the followi ...
Lecture 13
... • These stars have finished fusing H to He in their cores are no longer on the main sequence. • They may be fusing He to Carbon in their core or fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hyd ...
... • These stars have finished fusing H to He in their cores are no longer on the main sequence. • They may be fusing He to Carbon in their core or fusing H to He in shell outside the core … but there is no H to He fusion in the core. • All stars become larger and redder after exhausting their core hyd ...
1. Stellar Evolution – Notes Astronomers classify stars according to
... The Sun is an average medium-mass star. It has been shining as a stable main sequence star for about 5 billion years, and it should continue to shine steadily for another 5 billion years. red giant nebula ...
... The Sun is an average medium-mass star. It has been shining as a stable main sequence star for about 5 billion years, and it should continue to shine steadily for another 5 billion years. red giant nebula ...
Deducing Temperatures and Luminosities of Stars
... – Absolute magnitude of sun ≈ +5 (pretty faint) ...
... – Absolute magnitude of sun ≈ +5 (pretty faint) ...
Lars Bildsten - nnpss
... The luminosity of the star is determined by heat transport, since the core is hot, and the surface is cold (VACUUM!). Unlike in your house, the heat is transported by diffusion of photons, which have a mean free path l, giving: ...
... The luminosity of the star is determined by heat transport, since the core is hot, and the surface is cold (VACUUM!). Unlike in your house, the heat is transported by diffusion of photons, which have a mean free path l, giving: ...
Grand Tour Worksheet - School District of La Crosse
... 4. What order of magnitude is a light year to an A.U.? 5. What is the average distance between stars in our galaxy? ...
... 4. What order of magnitude is a light year to an A.U.? 5. What is the average distance between stars in our galaxy? ...
Directed Reading A
... _____ 18. left side of modern H-R diagram 19. Place these stars in order from earliest in life cycle to oldest in life cycle: red giant, white dwarf, main-sequence star. _______________________________________________________________ _______________________________________________________________ __ ...
... _____ 18. left side of modern H-R diagram 19. Place these stars in order from earliest in life cycle to oldest in life cycle: red giant, white dwarf, main-sequence star. _______________________________________________________________ _______________________________________________________________ __ ...
Stages in the Life of a Star
... • At the bloated-out surface, the energy is spread out over a larger area so each square centimeter will be cooler giving the light a red color. • Red giants can eject a lot of mass through “winds”’. Note: A Red Giant may be large in terms of linear size, but it is less massive than the main sequenc ...
... • At the bloated-out surface, the energy is spread out over a larger area so each square centimeter will be cooler giving the light a red color. • Red giants can eject a lot of mass through “winds”’. Note: A Red Giant may be large in terms of linear size, but it is less massive than the main sequenc ...
Methods Of Discovering Extra solar Planets.
... Method 3: Radial Velocity! • Radial Velocity is one of the motions of the star does known as stellar motion. • Radial Velocity is use in redshift. As it will be altered slightly when a planet goes by. • To use radial velocity astronomers look for an altercation in the movement of the star, Possibly ...
... Method 3: Radial Velocity! • Radial Velocity is one of the motions of the star does known as stellar motion. • Radial Velocity is use in redshift. As it will be altered slightly when a planet goes by. • To use radial velocity astronomers look for an altercation in the movement of the star, Possibly ...
Astronomy Notes: Deep Space
... Nearest star to our solar system: Proxima Centauri 4.2 ly (lightyear): (one parsec). Parallax measures the shift of a star compared to background stars. Electromagnetic Spectrum: energy given off in transverse waves. P. 14 ESRT 2. All EME travels at the speed of light. Longer wavelengths = lower ene ...
... Nearest star to our solar system: Proxima Centauri 4.2 ly (lightyear): (one parsec). Parallax measures the shift of a star compared to background stars. Electromagnetic Spectrum: energy given off in transverse waves. P. 14 ESRT 2. All EME travels at the speed of light. Longer wavelengths = lower ene ...
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.