Starry Night¨ Times - October 2008
... a fine open cluster lying about 2,000 lightyears from the back of your eyeball. It has about 25 bright stars spattered across a field about the size of a full moon; in reality, they're spread over an area 20 lightyears in width. Bright enough to be sometimes visible to the naked eye (Aristotle is sa ...
... a fine open cluster lying about 2,000 lightyears from the back of your eyeball. It has about 25 bright stars spattered across a field about the size of a full moon; in reality, they're spread over an area 20 lightyears in width. Bright enough to be sometimes visible to the naked eye (Aristotle is sa ...
Why Study Binary Stars?
... • Velocity times Period gives Distance traveled which equals Circumference of orbit thus radius of orbit in kilometers • (M1+M2)=A3/P2 gives total mass times sine inclination (upper limit) • V1/V2=M2/M1 gives ratio of Masses ...
... • Velocity times Period gives Distance traveled which equals Circumference of orbit thus radius of orbit in kilometers • (M1+M2)=A3/P2 gives total mass times sine inclination (upper limit) • V1/V2=M2/M1 gives ratio of Masses ...
ISP205L Visions of the Universe Laboratory
... Properties of light. Spectroscopy of arc lamps (hands-on lab exercise in PL lobby). ...
... Properties of light. Spectroscopy of arc lamps (hands-on lab exercise in PL lobby). ...
The Search for Exoplanets - Worcester Polytechnic Institute
... derives from the Greek εξώ, meaning “outside”, and πλανήτης, meaning “planet”, and was coined in the early 1990s. Exoplanets come in a wide variety of sizes and compositions - some being large gas giants like Jupiter or Saturn, while others are small and rocky, like Earth and Mars. Exoplanets are al ...
... derives from the Greek εξώ, meaning “outside”, and πλανήτης, meaning “planet”, and was coined in the early 1990s. Exoplanets come in a wide variety of sizes and compositions - some being large gas giants like Jupiter or Saturn, while others are small and rocky, like Earth and Mars. Exoplanets are al ...
Star Formation
... A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
... A. It would continue contracting, but its temperature would not change B. Its mass would increase C. Its internal pressure would increase ...
Planets Unit Plan
... This book is part of the Magic School Bus series with the familiar characters of Ms. Frizzle, Arnold and the whole gang. It is a great resource for an introduction to the solar system as it goes through all of the planets and has funny commentary throughout the book. Somewhere in the Universe This b ...
... This book is part of the Magic School Bus series with the familiar characters of Ms. Frizzle, Arnold and the whole gang. It is a great resource for an introduction to the solar system as it goes through all of the planets and has funny commentary throughout the book. Somewhere in the Universe This b ...
The James Webb Space Telescope: A Vision for the Future
... dioxide and methane, the chemical byproducts of life. ...
... dioxide and methane, the chemical byproducts of life. ...
Stars in Their Youth
... of catching them in this phase will obviously be the greatest). If all the stars found in the main sequence are chemically homogeneous and are converting hydrogen into helium in their core, one may ask what distinguishes them. The most important factor that determines the location of a star within t ...
... of catching them in this phase will obviously be the greatest). If all the stars found in the main sequence are chemically homogeneous and are converting hydrogen into helium in their core, one may ask what distinguishes them. The most important factor that determines the location of a star within t ...
Stellar Evolution
... force of gravity pulling in, and pressure from the heat of fusion pushing out. • Stars on the main sequence burn hydrogen in their core to produce heat. • Longest phase of a star’s life. ...
... force of gravity pulling in, and pressure from the heat of fusion pushing out. • Stars on the main sequence burn hydrogen in their core to produce heat. • Longest phase of a star’s life. ...
High velocity clouds (v > 90 km/s), up to 108 M_sun in total Seen at
... This is how V should fall off with r as long as all of the mass is interior to the orbits being considered. Now, consider a spherical distribution of mass of uniform density, in which particles (stars) orbit inside the mass distribution. The mass interior to the orbit is then ! ...
... This is how V should fall off with r as long as all of the mass is interior to the orbits being considered. Now, consider a spherical distribution of mass of uniform density, in which particles (stars) orbit inside the mass distribution. The mass interior to the orbit is then ! ...
Astronomy Activity: The Life-Line of the Stars
... Just like a fire flame (like a burning match) has different colors, so do the stars. This is because stars have different temperatures. Really hot stars are blue or white-hot. Cool stars are red or redish-orange in color. Astronomers classify stars based on what they are made of (in addition to hydr ...
... Just like a fire flame (like a burning match) has different colors, so do the stars. This is because stars have different temperatures. Really hot stars are blue or white-hot. Cool stars are red or redish-orange in color. Astronomers classify stars based on what they are made of (in addition to hydr ...
The Constellations
... Pattern in the Sky • Star pattern repeats itself about every 24 hours… because of the rotation of Earth with respect to the distant stars! • Star pattern in the winter is different from that in the summer… because of the revolution of Earth around the Sun! • Stars do move back a nd forth (a teeny-ti ...
... Pattern in the Sky • Star pattern repeats itself about every 24 hours… because of the rotation of Earth with respect to the distant stars! • Star pattern in the winter is different from that in the summer… because of the revolution of Earth around the Sun! • Stars do move back a nd forth (a teeny-ti ...
PDF version - Caltech Astronomy
... What about understanding? What good was it to discover quasars or gamma-ray bursts if you didn’t understand the physical processes at work? Genuine astrophysical understanding required a completely different set of tools: theoretical tools. Isaac Newton’s discoveries of the laws of motion and gravit ...
... What about understanding? What good was it to discover quasars or gamma-ray bursts if you didn’t understand the physical processes at work? Genuine astrophysical understanding required a completely different set of tools: theoretical tools. Isaac Newton’s discoveries of the laws of motion and gravit ...
Shining Light on the Stars: The Hertzsprung-Russell
... A star’s color is related to one of its most important properties: its surface temperature. Consider our three stars again. Red stars like Betelgeuse are the coolest with surface temperatures of about three or four thousand degrees Kelvin, where Kelvin degrees come from a temperature scale related t ...
... A star’s color is related to one of its most important properties: its surface temperature. Consider our three stars again. Red stars like Betelgeuse are the coolest with surface temperatures of about three or four thousand degrees Kelvin, where Kelvin degrees come from a temperature scale related t ...
Chapter 30 Notes
... • Giant stars called Cepheid variables brighten and fade in a regular pattern. Most Cepheids have regular cycles. The longer the cycle, the brighter the star’s absolute magnitude. • Scientists compare the Cepheid’s absolute magnitude and the Cepheid’s apparent magnitude to calculate the distance to ...
... • Giant stars called Cepheid variables brighten and fade in a regular pattern. Most Cepheids have regular cycles. The longer the cycle, the brighter the star’s absolute magnitude. • Scientists compare the Cepheid’s absolute magnitude and the Cepheid’s apparent magnitude to calculate the distance to ...
DSSI at DCT: Superearth Validation with High
... target brightness for the speckle observations on the WIYN 3.5 m telescope (Howell et al. 2011). ...
... target brightness for the speckle observations on the WIYN 3.5 m telescope (Howell et al. 2011). ...
Linking Asteroids and Meteorites through Reflectance
... • Black dwarf – Theoretical cooled down white dwarf • Not hot enough to emit significant amounts of light • Since the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe of 13.7 billion years, no black dwarfs are expected to exist in th ...
... • Black dwarf – Theoretical cooled down white dwarf • Not hot enough to emit significant amounts of light • Since the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe of 13.7 billion years, no black dwarfs are expected to exist in th ...
apparent magnitude - Harding University
... from that star. Thus, if the star were to explode today, we would not be aware of it for 4.3 years! Similarly, when we observe the light from a distant star we are looking at that stars characteristics some time in the distant past – that star may not ever exist today! ...
... from that star. Thus, if the star were to explode today, we would not be aware of it for 4.3 years! Similarly, when we observe the light from a distant star we are looking at that stars characteristics some time in the distant past – that star may not ever exist today! ...
The Solar Neighborhood
... Estimating the Ages of Star Clusters - Massive stars burn their nuclear fuel faster than lower mass stars and leave the main sequence sooner. In a cluster in which all the stars formed at the same time, the stars “peel off” the main sequence from the top, leaving only progressively less and less mas ...
... Estimating the Ages of Star Clusters - Massive stars burn their nuclear fuel faster than lower mass stars and leave the main sequence sooner. In a cluster in which all the stars formed at the same time, the stars “peel off” the main sequence from the top, leaving only progressively less and less mas ...
Stellar Evolution
... solar masses), hottest (surface temperatures over 25,000 K), and shortest lived stars known. Wolf-Rayet stars represent an evolutionary phase in the lives of massive stars during which they undergo heavy mass loss. They are characterized by spectra dominated by emission lines of highly ionized eleme ...
... solar masses), hottest (surface temperatures over 25,000 K), and shortest lived stars known. Wolf-Rayet stars represent an evolutionary phase in the lives of massive stars during which they undergo heavy mass loss. They are characterized by spectra dominated by emission lines of highly ionized eleme ...