2010_02_04 LP08 Our Galactic Home
... From wandering on a foreign strand! If such there breathe, go, mark him well; ...
... From wandering on a foreign strand! If such there breathe, go, mark him well; ...
search for extrasolar planets
... • Existing data precise enough to have shown terrestrial-mass planets ...
... • Existing data precise enough to have shown terrestrial-mass planets ...
Schedule for Spring 2013 SCI 103 Introductory Astronomy
... Proof that the CE intersects the horizon exactly due E and W for all observers, Examples UNL Rotating Sky Proof that the slant angle of rising and setting stars wrt to the vertical = obs lat, Examples Altitude of the SCP Declination of the southernmost visible star Time scales based on path length D ...
... Proof that the CE intersects the horizon exactly due E and W for all observers, Examples UNL Rotating Sky Proof that the slant angle of rising and setting stars wrt to the vertical = obs lat, Examples Altitude of the SCP Declination of the southernmost visible star Time scales based on path length D ...
Duncan Wright
... and those from another ThAr image (Figure 3-a) we can measure the changes in position of the emission lines precisely by fitting a Gaussian to the crosscorrelation of a section of the two spectra (Figure 3-b and c). By doing this for different sections of ThAr spectra over the image wecan build up i ...
... and those from another ThAr image (Figure 3-a) we can measure the changes in position of the emission lines precisely by fitting a Gaussian to the crosscorrelation of a section of the two spectra (Figure 3-b and c). By doing this for different sections of ThAr spectra over the image wecan build up i ...
HW6 due - Yale Astronomy
... happens to encounter another star is a random event -‐-‐in other words, that all paths through the galaxy are equally likely.) ...
... happens to encounter another star is a random event -‐-‐in other words, that all paths through the galaxy are equally likely.) ...
Exoplanets. I
... The radius of the orbit is inversely proportional to the mass The radius of the Sun’s orbit with respect to the Earth is 1/300,000 AU, or 500 km ...
... The radius of the orbit is inversely proportional to the mass The radius of the Sun’s orbit with respect to the Earth is 1/300,000 AU, or 500 km ...
Stars
... It is about 2,100 times larger than the sun. It would fit about 9,261,000,000 suns in it. The smallest star known is the OGLE-TR-122B it is 12 solar radii. • That is about 167,ooo km (kilometers). ...
... It is about 2,100 times larger than the sun. It would fit about 9,261,000,000 suns in it. The smallest star known is the OGLE-TR-122B it is 12 solar radii. • That is about 167,ooo km (kilometers). ...
Extra-Solar Planets
... In 1994, Penn State Prof. Alex Wolzczan discovered the first planet outside the solar system through timing of a pulsar. This pulsar has 3 small planets with masses of 0.02, 4.3, and 3.9 M (M=mass of Earth). These planets probably formed after the supernova explosion from the debris that was left ...
... In 1994, Penn State Prof. Alex Wolzczan discovered the first planet outside the solar system through timing of a pulsar. This pulsar has 3 small planets with masses of 0.02, 4.3, and 3.9 M (M=mass of Earth). These planets probably formed after the supernova explosion from the debris that was left ...
No. 35 - Institute for Astronomy
... is swamped by the glare of their host stars, which are about a billion times brighter. However, when gasgiant planets are young, they also emit their own light at infrared wavelengths, by releasing the heat stored in their interiors at the time of formation. This makes young planets much easier to d ...
... is swamped by the glare of their host stars, which are about a billion times brighter. However, when gasgiant planets are young, they also emit their own light at infrared wavelengths, by releasing the heat stored in their interiors at the time of formation. This makes young planets much easier to d ...
29_worlds_unnumbered..
... had a close in “Vulcan” that fell into the Sun at some point. Note searches based on stellar wobble are most sensitive to massive planets orbiting close in. We don’t yet have the sensitivity to detect Earth mass planets. Therefore results suggest a variety of solar systems. We have not yet ruled out ...
... had a close in “Vulcan” that fell into the Sun at some point. Note searches based on stellar wobble are most sensitive to massive planets orbiting close in. We don’t yet have the sensitivity to detect Earth mass planets. Therefore results suggest a variety of solar systems. We have not yet ruled out ...
Habitable zone - Penn State University
... • Caveat: For planets with low volcanic outgassing rates and with low stellar insolation, it may not be possible to maintain warm climates all the time. Instead, one may get limit cycling behavior, in which the climate alternates between warm and globally glaciated states (see, e.g., Kadoya and Taji ...
... • Caveat: For planets with low volcanic outgassing rates and with low stellar insolation, it may not be possible to maintain warm climates all the time. Instead, one may get limit cycling behavior, in which the climate alternates between warm and globally glaciated states (see, e.g., Kadoya and Taji ...
Week 11 Concept Summary
... is distributed and not concentrated at the center. In fact, all the stars and gas we know of are not enough mass to keep the curve flat at large distances. This tells us there is much more matter out in the halo than what we can see: first evidense for Dark Matter. 5. Distance Ladder: How do you mea ...
... is distributed and not concentrated at the center. In fact, all the stars and gas we know of are not enough mass to keep the curve flat at large distances. This tells us there is much more matter out in the halo than what we can see: first evidense for Dark Matter. 5. Distance Ladder: How do you mea ...
Answers for the HST Scavenger Hunt
... Give a definition of these kinds of stars. Hot, dense remains of a low-mass star like our Sun that has exhausted its sources of fuel for thermonuclear fusion. What is a Wolf-Rayet Star? Massive stars, which are usually are surrounded by outflowing gas clouds. How is this star type different from whi ...
... Give a definition of these kinds of stars. Hot, dense remains of a low-mass star like our Sun that has exhausted its sources of fuel for thermonuclear fusion. What is a Wolf-Rayet Star? Massive stars, which are usually are surrounded by outflowing gas clouds. How is this star type different from whi ...
The Milky Way Galaxy
... White Dwarf Stars, Red Dwarfs (0.2 Msun), Brown Dwarfs (<0.08 Msun), Neutron Stars, Black Holes. Recall that the more massive remnants result from relatively rare high, mass stellar progenitors. ...
... White Dwarf Stars, Red Dwarfs (0.2 Msun), Brown Dwarfs (<0.08 Msun), Neutron Stars, Black Holes. Recall that the more massive remnants result from relatively rare high, mass stellar progenitors. ...
MilkyWay
... White Dwarf Stars, Red Dwarfs (0.2 Msun), Brown Dwarfs (<0.08 Msun), Neutron Stars, Black Holes. Recall that the more massive remnants result from relatively rare high, mass stellar progenitors. ...
... White Dwarf Stars, Red Dwarfs (0.2 Msun), Brown Dwarfs (<0.08 Msun), Neutron Stars, Black Holes. Recall that the more massive remnants result from relatively rare high, mass stellar progenitors. ...
The life and times of stars
... A galaxy will give out a continuous spectrum as it has billions of different sources The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will pr ...
... A galaxy will give out a continuous spectrum as it has billions of different sources The surface of the Sun gives out a continuous spectrum – it is an incandescent body The Sun’s atmosphere will produce an absorption spectrum as it is a gas that the Sun’s light is shining through Most nebula will pr ...
Stars and galaxies Intro
... Globular cluster Messier 10 seen here in an image from the 3 NASA/ESA Hubble Space Telescope ...
... Globular cluster Messier 10 seen here in an image from the 3 NASA/ESA Hubble Space Telescope ...
What is a galaxy - University of Melbourne
... ★ It takes time for information to reach us ★ When we receive it, we get a snapshot of the ...
... ★ It takes time for information to reach us ★ When we receive it, we get a snapshot of the ...
Chapter 25 - Notes Super Size
... » Depending on the mass of the core, one of the _________________ will occur: 1.) _________________ Star- smaller cores will produce a dense core of neutrons about 20km in diameter. 2.) Black Hole- larger cores will collapse to a super dense _________________. The gravity near this mass is so strong ...
... » Depending on the mass of the core, one of the _________________ will occur: 1.) _________________ Star- smaller cores will produce a dense core of neutrons about 20km in diameter. 2.) Black Hole- larger cores will collapse to a super dense _________________. The gravity near this mass is so strong ...
Practice Questions for Final
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
Chapter 28 – Stars and Galaxies
... 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appear in the nighttime sky H. Variable Stars 1. Some st ...
... 2. If two stars have the same surface temperature, the larger star would be more luminous 3. If the same size, hotter one would be brighter 4. Types of magnitude a. Absolute – as if all stars were same distance from earth b. Apparent – as they appear in the nighttime sky H. Variable Stars 1. Some st ...
The human race has made great strides in the last few centuries
... The first exoplanets were detected using a spectroscopic technique. A star and its planet both orbit around a common center of mass. Though the orbital speed of the star is much less than that of the planet, it is, nonetheless, detectable in the Doppler shift of the stellar lines. The first discover ...
... The first exoplanets were detected using a spectroscopic technique. A star and its planet both orbit around a common center of mass. Though the orbital speed of the star is much less than that of the planet, it is, nonetheless, detectable in the Doppler shift of the stellar lines. The first discover ...
March 2016 Star Diagonal - Ogden Astronomical Society
... eye. At over 400 parsecs (1,300 light years) distant, it's one of the most spectacular sights in the night sky, and the vast majority of the light from galaxies originates from nebulae like this one. But its great luminosity and relative proximity makes it easy to overlook the fact that there are a ...
... eye. At over 400 parsecs (1,300 light years) distant, it's one of the most spectacular sights in the night sky, and the vast majority of the light from galaxies originates from nebulae like this one. But its great luminosity and relative proximity makes it easy to overlook the fact that there are a ...
Exam 3 Study Guide
... Spiral galaxies have spiral arms, gas, and young stars. Elliptical galaxies do not have arms, or a disk like structure, are mostly older stars, and contain very little gas. How do spiral galaxies form? A protogalactic cloud forms a disk because of available gas. For this to happen, the cloud must no ...
... Spiral galaxies have spiral arms, gas, and young stars. Elliptical galaxies do not have arms, or a disk like structure, are mostly older stars, and contain very little gas. How do spiral galaxies form? A protogalactic cloud forms a disk because of available gas. For this to happen, the cloud must no ...
Space Interferometry Mission
The Space Interferometry Mission, or SIM, also known as SIM Lite (formerly known as SIM PlanetQuest), was a planned space telescope developed by the U.S. National Aeronautics and Space Administration (NASA), in conjunction with contractor Northrop Grumman. One of the main goals of the mission was the hunt for Earth-sized planets orbiting in the habitable zones of nearby stars other than the Sun. SIM was postponed several times and finally cancelled in 2010.In addition to hunting for extrasolar planets, SIM would have helped astronomers construct a map of the Milky Way galaxy. Other important tasks would have included collecting data to help pinpoint stellar masses for specific types of stars, assisting in the determination of the spatial distribution of dark matter in the Milky Way and in the Local Group of galaxies and using the gravitational microlensing effect to measure the mass of stars.The spacecraft would have used optical interferometry to accomplish these and other scientific goals. This technique collects light with multiple mirrors (in SIM's case, two) which is combined to make an interference pattern which can be very precisely measured.The initial contracts for SIM Lite were awarded in 1998, totaling US$200 million. Work on the SIM project required scientists and engineers to move through eight specific new technology milestones, and by November 2006, all eight had been completed.SIM Lite was originally scheduled for a 2005 launch, aboard an Evolved Expendable Launch Vehicle (EELV). As a result of continued budget cuts, the launch date has been pushed back at least five times. NASA has set a preliminary launch date for 2015 and U.S. federal budget documents confirm that a launch date is expected ""no earlier"" than 2015. The budget cuts to SIM Lite are expected to continue through FY 2010. As of February 2007, many of the engineers working on the SIM program had moved on to other areas and projects, and NASA directed the project to allocate its resources toward engineering risk reduction. However, the preliminary budget for NASA for 2008 included zero dollars for SIM.In December 2007, the Congress restored funding for fiscal year 2008 as part of an omnibus appropriations bill which the President later signed. At the same time the Congress directed NASA to move the mission forward to the development phase. In 2009 the project continued its risk reduction work while waiting for the findings and recommendations of the Astronomy and Astrophysics Decadal Survey, Astro2010, performed by the National Academy of Sciences, which would determine the project's future.On 13 August 2010, the Astro2010 Decadal Report was released and did not recommend that NASA continue the development of the SIM Lite Astrometric Observatory. This prompted NASA Astronomy and Physics Director, Jon Morse, to issue a letter on 24 September 2010 to the SIM Lite project manager, informing him that NASA was discontinuing its sponsorship of the SIM Lite mission and directing the project to discontinue Phase B activities immediately or as soon as practical. Accordingly, all SIM Lite activities were closed down by the end of calendar year 2010.