Photometric Surveys and Variable stars
... The large surveys are looking for more than variable stars -- everything from extrasolar planets to weak lensing. Variable stars are a stated aim for most, but secondary. (High-z SN are the only “variables” mentioned on the LSST front page!) ...
... The large surveys are looking for more than variable stars -- everything from extrasolar planets to weak lensing. Variable stars are a stated aim for most, but secondary. (High-z SN are the only “variables” mentioned on the LSST front page!) ...
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 ...
Activities, In the Footsteps of Galileo
... telescope. It has four moons (Io, Europa, Ganymede, and Callisto) which orbit around it, the innermost (Io) taking less than two days to do so and the outermost (Callisto) taking two weeks. Activity: Observe and draw Jupiter and its four moons at about the same time on at least three evenings over o ...
... telescope. It has four moons (Io, Europa, Ganymede, and Callisto) which orbit around it, the innermost (Io) taking less than two days to do so and the outermost (Callisto) taking two weeks. Activity: Observe and draw Jupiter and its four moons at about the same time on at least three evenings over o ...
HR diagram
... This diagram is a plot of stellar brightness (luminosity) versus stellar color (temperature). Brightness (luminosity) is plotted along the Y-axis; color (temperature) along the X-axis. The diagram is named for the two astronomers who created the first version around 1912, uncovering fundamental rela ...
... This diagram is a plot of stellar brightness (luminosity) versus stellar color (temperature). Brightness (luminosity) is plotted along the Y-axis; color (temperature) along the X-axis. The diagram is named for the two astronomers who created the first version around 1912, uncovering fundamental rela ...
7.4 Evolution on the Main-Sequence Main-sequence (m
... LMS stars have convective envelopes because of their high opacities. The extent depends on mass: at 1 M , the convective envelope accounts for 3% by mass whereas at 0.5 M , the convective envelope increases to 40% by mass. Note: stars with M ≤ 0.25 M are fully convective. • (b) Upper Main Sequenc ...
... LMS stars have convective envelopes because of their high opacities. The extent depends on mass: at 1 M , the convective envelope accounts for 3% by mass whereas at 0.5 M , the convective envelope increases to 40% by mass. Note: stars with M ≤ 0.25 M are fully convective. • (b) Upper Main Sequenc ...
ES Chapter 30
... together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through several methods. • Accurate measurements can show that its position shifts back and forth as ...
... together and that orbit a common center of mass. – More than half of the stars in the sky are either binary stars or members of multiple-star systems. – Astronomers are able to identify binary stars through several methods. • Accurate measurements can show that its position shifts back and forth as ...
Document
... – How does the daily motion of the Celestial Sphere (rotation of the Earth!) relate to the daily/monthly changes due to Earth’s orbit? ...
... – How does the daily motion of the Celestial Sphere (rotation of the Earth!) relate to the daily/monthly changes due to Earth’s orbit? ...
2016 Spring, VAS Newsletter
... The Closest New Stars To Earth By Ethan Siegel When you think about the new stars forming in the Milky Way, you probably think of the giant star-forming regions like the Orion Nebula, containing thousands of new stars with light so bright it's visible to the naked eye. At over 400 parsecs (1,300 lig ...
... The Closest New Stars To Earth By Ethan Siegel When you think about the new stars forming in the Milky Way, you probably think of the giant star-forming regions like the Orion Nebula, containing thousands of new stars with light so bright it's visible to the naked eye. At over 400 parsecs (1,300 lig ...
HR DIAGRAM (Page 1) - McDonald Observatory
... the brightest star in the sky, mainly because it lies so close to us at a mere 9 light years away. Procyon is only 11 light years away, and is a F5 V stellar type. It is cooler than Sirius, and thus less luminous. Alpha Centauri A and the Sun could be considered “twin” stars. They are the same stell ...
... the brightest star in the sky, mainly because it lies so close to us at a mere 9 light years away. Procyon is only 11 light years away, and is a F5 V stellar type. It is cooler than Sirius, and thus less luminous. Alpha Centauri A and the Sun could be considered “twin” stars. They are the same stell ...
Supernovae Gamma-Ray Bursts and and some of their uses
... • Supernova remnants may be observed for hundreds of thousands of years as often beautiful, visual objects, but also as emitters of radio waves and X-rays • Close to 150 supernova remnants have been detected in the Milky Way and more than a hundred are being discovered every year in distant galaxies ...
... • Supernova remnants may be observed for hundreds of thousands of years as often beautiful, visual objects, but also as emitters of radio waves and X-rays • Close to 150 supernova remnants have been detected in the Milky Way and more than a hundred are being discovered every year in distant galaxies ...
The Earth in Context: Universe and Solar System
... electrons are drawn into the nucleus of atom, combining with p+ to form neutrons, hence the name "neutron star" ...
... electrons are drawn into the nucleus of atom, combining with p+ to form neutrons, hence the name "neutron star" ...
QDSpaperFred1.tex
... the Hipparchos data provides distance measurements or lower limits that provide an easy distinction between the relatively low luminosity main-sequence stars that could host colonies, and the very large, short-lived giant stars. As new instruments become available a search of greater sensitivity bec ...
... the Hipparchos data provides distance measurements or lower limits that provide an easy distinction between the relatively low luminosity main-sequence stars that could host colonies, and the very large, short-lived giant stars. As new instruments become available a search of greater sensitivity bec ...
The Final Flight of Atlantis - Westchester Amateur Astronomers
... inexpensive Meade Electronic Eyepiece, to shoot this image of the Sun. The scope was mounted on a Tech200/Giro-2 "track and train" drive. He captured a one-minute avi file using Deepsky Imaging on a netbook with an inexpensive USB-video adaptor. Larry ran the avi through Registax 5 to stack the imag ...
... inexpensive Meade Electronic Eyepiece, to shoot this image of the Sun. The scope was mounted on a Tech200/Giro-2 "track and train" drive. He captured a one-minute avi file using Deepsky Imaging on a netbook with an inexpensive USB-video adaptor. Larry ran the avi through Registax 5 to stack the imag ...
Slides from the second lecture
... • Further atom building in solar-type stars is prohibited by the increasingly strong Coulomb barrier (Not enough T and density to get an alpha into a nucleus) – However, in more massive stars, the central temperature may be significantly higher, allowing further reactions to occur. – Iron is the mos ...
... • Further atom building in solar-type stars is prohibited by the increasingly strong Coulomb barrier (Not enough T and density to get an alpha into a nucleus) – However, in more massive stars, the central temperature may be significantly higher, allowing further reactions to occur. – Iron is the mos ...
The Sun is a Star
... THE SUN- OBSERVING THE SUN • NEVER look directly at the Sun. It can damage your eyes. • You can view the Sun by making a small hole in a piece of paper. Then, hold the paper with the hole about a meter from a black piece of paper. You will see an image of the Sun. ...
... THE SUN- OBSERVING THE SUN • NEVER look directly at the Sun. It can damage your eyes. • You can view the Sun by making a small hole in a piece of paper. Then, hold the paper with the hole about a meter from a black piece of paper. You will see an image of the Sun. ...
star
... observe a star this long! How can we learn about the stages in a star’s life? We can take a celestial census, getting a snapshot of many stars at different stages of their life We can then try to infer the stages that a star goes through from the data we assemble in the census But we can be misled i ...
... observe a star this long! How can we learn about the stages in a star’s life? We can take a celestial census, getting a snapshot of many stars at different stages of their life We can then try to infer the stages that a star goes through from the data we assemble in the census But we can be misled i ...
Gravity
... distance of two Earth radii above the surface of Earth. As it travels from Earth to this new location, which of the following is correct? a. The mass of the satellite decreases and the weight remains constant. b. The mass of the satellite remains constant and its weight decreases. c. Both the mass o ...
... distance of two Earth radii above the surface of Earth. As it travels from Earth to this new location, which of the following is correct? a. The mass of the satellite decreases and the weight remains constant. b. The mass of the satellite remains constant and its weight decreases. c. Both the mass o ...
Lectures 14 & 15 powerpoint (neutron stars & black holes)
... 4.3 and 3.9 Earth masses! Further analysis revealed a third planet with a mass of about that of our moon! And there is evidence that a fourth planet about 100 Earth masses orbits this pulsar with a much larger separation. Q: How can a NS have planets?!? (Recall that NS are created by supernovae, and ...
... 4.3 and 3.9 Earth masses! Further analysis revealed a third planet with a mass of about that of our moon! And there is evidence that a fourth planet about 100 Earth masses orbits this pulsar with a much larger separation. Q: How can a NS have planets?!? (Recall that NS are created by supernovae, and ...
12-3 Planets and Satellites Types of Orbits
... objects are not points. Near side of Earth is closer to Moon than far side, so the magnitude of the gravitational force is not the same on both sides. This difference in gravitational forces on different parts of an extended object is the tidal force. ...
... objects are not points. Near side of Earth is closer to Moon than far side, so the magnitude of the gravitational force is not the same on both sides. This difference in gravitational forces on different parts of an extended object is the tidal force. ...
MilkyWay
... velocities of those globular clusters were ~250 km/s, much higher than the mass of the smaller Kapteyn galaxy model would require. So the galaxy must contain more stars (and mass) than Kapteyn originally thought in order to keep the star clusters from flying off. ...
... velocities of those globular clusters were ~250 km/s, much higher than the mass of the smaller Kapteyn galaxy model would require. So the galaxy must contain more stars (and mass) than Kapteyn originally thought in order to keep the star clusters from flying off. ...
Elements from Stardust
... • The Sun is a G-type main-sequence star (G2V) based on spectral class and it is informally designated as a yellow dwarf because its visible radiation is most intense in the yellow-green portion of the spectrum, and although it is actually white in color, from the surface of the Earth it may appear ...
... • The Sun is a G-type main-sequence star (G2V) based on spectral class and it is informally designated as a yellow dwarf because its visible radiation is most intense in the yellow-green portion of the spectrum, and although it is actually white in color, from the surface of the Earth it may appear ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.